BUEHLER®

BUEHLER ®
Tables for Knoop
and Vickers
Hardness Numbers

Knoop Hardness Table
Definition
Knoop Hardness: The value calculated according to the following formula from the test load at the time when the test surface
is indented and the projected area obtained from the length of longer diagonal of the indentation by use of diamond indenter
in the form of a right pyramid with a rhomboid base having angles at the vertex between two opposite edges of 172° 30 ‘
and 130° :
where HK : Knoop hardness
F : test load (N)
A : projected area of indentation ( mm 2
)
c : indenter constant (the constant to obtain A from d, it is taken as 0.07028)
d : length of longer diagonal of indentation (mm)
The numerical value of HK is not attached with unit.
HK = 0.102 F
A =0.102 F =1.451 F
2
cd d 2
Note: In the case where the unit of test load F is kgf, Knoop hardness shall be calculated according to the following formula:
HK = F
cd 2
F
d 2
= 14.23 x . . . . f: kgf, d: mm)
= 14.23 x 10 F
3
x . . . . f: kgf, d: µm)
d 2
F
d 2
= 14.23 x 10 6 x . . . . f: kgf, d: µm)

Knoop Hardness Table
Table of Contents
Load 5 gf (0.005kgf) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Load 10 gf (0.01kgf) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Load 25 gf (0.025kgf) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Load 50gf (0.05kgf) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Load 100gf (0.1kgf) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Load 200gf (0.2kgf) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Load 300gf (0.3kgf) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Load 500gf (0.5kgf) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Load 1000gf (1kgf) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Load 2000gf (2 kgf) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Load 5kgf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Load 10kgf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
Load 20kgf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Load 30kgf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Load 50kgf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

Load 5gf (0.005kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
5 2846 2735 2631 2533 2440 2352 2269 2190 2115 2044
6 1976 1912 1851 1793 1737 1684 1633 1585 1539 1494
7 1452 1411 1372 1335 1299 1265 1232 1200 1169 1140
8 1112 1084 1058 1033 1008 985 962 940 919 898
9 878 859 841 823 805 788 772 756 741 726
10 712 697 684 671 658 645 633 621 610 599
11 588 577 567 557 547 538 529 520 511 502
12 494 486 478 470 463 455 448 441 434 428
13 421 415 408 402 396 390 385 379 374 368
14 363 358 353 348 343 338 334 329 325 320
15 316 312 308 304 300 296 292 289 285 281
16 278 274 271 268 265 261 258 255 252 249
17 246 243 241 238 235 232 230 227 225 222
18 220 217 215 212 210 208 206 203 201 199
19 197 195 193 191 189 187 185 183 181 180
20 178 176 174 173 171 169 168 166 164 163
21 161 160 158 157 155 154 152 151 150 148
22 147 146 144 143 142 141 139 138 137 136
23 134 133 132 131 130 129 128 127 126 125
24 124 123 121 120 120 119 118 117 116 115
25 114 113 112 111 110 109 109 108 107 106
26 105 104 104 103 102 101 101 99.8 99.1 98.3
27 97.6 96.9 96.2 95.5 94.8 94.1 93.4 92.7 92.1 91.4
28 90.8 90.1 89.5 88.8 88.2 87.6 87.0 86.4 85.8 85.2
29 84.6 84.0 83.4 82.9 82.3 81.8 81.2 80.7 80.1 79.6
30 79.1 78.5 78.0 77.5 77.0 76.5 76.0 75.5 75.0 74.5
31 74.0 73.6 73.1 72.6 72.2 71.7 71.3 70.8 70.4 69.9
32 69.5 69.1 68.6 68.2 67.8 67.4 66.9 66.5 66.1 65.7
33 65.3 64.9 64.6 64.2 63.8 63.4 63.0 62.6 62.3 61.9
34 61.5 61.2 60.8 60.5 60.1 59.8 59.4 59.1 58.8 58.4
35 58.1 57.8 57.4 57.1 56.8 56.5 56.1 55.8 55.5 55.2
36 54.9 54.6 54.3 54.0 53.7 53.4 53.1 52.8 52.5 52.3
37 52.0 51.7 51.4 51.1 50.9 50.6 50.3 50.1 49.8 49.5
38 49.3 49.0 48.8 48.5 48.3 48.0 47.8 47.5 47.3 47.0
39 46.8 46.5 46.3 46.1 45.8 45.6 45.4 45.1 44.9 44.7
40 44.5 44.2 44.0 43.8 43.6 43.4 43.2 43.0 42.7 42.5
41 42.3 42.1 41.9 41.7 41.5 41.3 41.1 40.9 40.7 40.5
42 40.3 40.1 40.0 39.8 39.6 39.4 39.2 39.0 38.8 38.7
43 38.5 38.3 38.1 37.9 37.8 37.6 37.4 37.3 37.1 36.9
44 36.8 36.6 36.4 36.3 36.1 35.9 35.8 35.6 35.5 35.3
45 35.1 35.0 34.8 34.7 34.5 34.4 34.2 34.1 33.9 33.8
46 33.6 33.5 33.3 33.2 33.0 32.9 32.8 32.6 32.5 32.3
47 32.2 32.1 31.9 31.8 31.7 31.5 31.4 31.3 31.1 31.0
48 30.9 30.8 30.6 30.5 30.4 30.2 30.1 30.0 29.9 29.8
49 29.6 29.5 29.4 29.3 29.2 29.0 28.9 28.8 28.7 28.6
50 28.5 28.3 28.2 28.1 28.0 27.9 27.8 27.7 27.6 27.5
1

Load 5gf (0.005kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
51 27.4 27.2 27.1 27.0 26.9 26.8 26.7 26.6 26.5 26.4
52 26.3 26.2 26.1 26.0 25.9 25.8 25.7 25.6 25.5 25.4
53 25.3 25.2 25.1 25.0 25.0 24.9 24.8 24.7 24.6 24.5
54 24.4 24.3 24.2 24.1 24.0 24.0 23.9 23.8 23.7 23.6
55 23.5 23.4 23.4 23.3 23.2 23.1 23.0 22.9 22.9 22.8
56 22.7 22.6 22.5 22.4 22.4 22.3 22.2 22.1 22.1 22.0
57 21.9 21.8 21.7 21.7 21.6 21.5 21.4 21.4 21.3 21.2
58 21.2 21.1 21.0 20.9 20.9 20.8 20.7 20.6 20.6 20.5
59 20.4 20.4 20.3 20.2 20.2 20.1 20.0 20.0 19.9 19.8
60 19.8 19.7 19.6 19.6 19.5 19.4 19.4 19.3 19.2 19.2
61 19.1 19.1 19.0 18.9 18.9 18.8 18.8 18.7 18.6 18.6
62 18.5 18.4 18.4 18.3 18.3 18.2 18.2 18.1 18.0 18.0
63 17.9 17.9 17.8 17.8 17.7 17.6 17.6 17.5 17.5 17.4
64 17.4 17.3 17.3 17.2 17.2 17.1 17.0 17.0 16.9 16.9
65 16.8 16.8 16.7 16.7 16.6 16.6 16.5 16.5 16.4 16.4
66 16.3 16.3 16.2 16.2 16.1 16.1 16.0 16.0 15.9 15.9
67 15.8 15.8 15.8 15.7 15.7 15.6 15.6 15.5 15.5 15.4
68 15.4 15.3 15.3 15.3 15.2 15.2 15.1 15.1 15.0 15.0
69 14.9 14.9 14.9 14.8 14.8 14.7 14.7 14.6 14.6 14.6
70 14.5 14.5 14.4 14.4 14.4 14.3 14.3 14.2 14.2 14.2
71 14.1 14.1 14.0 14.0 14.0 13.9 13.9 13.8 13.8 13.8
72 13.7 13.7 13.6 13.6 13.6 13.5 13.5 13.5 13.4 13.4
73 13.4 13.3 13.3 13.2 13.2 13.2 13.1 13.1 13.1 13.0
74 13.0 13.0 12.9 12.9 12.9 12.8 12.8 12.8 12.7 12.7
75 12.6 12.6 12.6 12.5 12.5 12.5 12.4 12.4 12.4 12.4
76 12.3 12.3 12.3 12.2 12.2 12.2 12.1 12.1 12.1 12.0
77 12.0 12.0 11.9 11.9 11.9 11.8 11.8 11.8 11.8 11.7
78 11.7 11.7 11.6 11.6 11.6 11.5 11.5 11.5 11.5 11.4
79 11.4 11.4 11.3 11.3 11.3 11.3 11.2 11.2 11.2 11.1
80 11.1 11.1 11.1 11.0 11.0 11.0 11.0 10.9 10.9 10.9
81 10.8 10.8 10.8 10.8 10.7 10.7 10.7 10.7 10.6 10.6
82 10.6 10.6 10.5 10.5 10.5 10.5 10.4 10.4 10.4 10.4
83 10.3 10.3 10.3 10.3 10.2 10.2 10.2 10.2 10.1 10.1
84 10.1 10.1 10.0 10.0 9.99 9.96 9.94 9.92 9.89 9.87
85 9.85 9.82 9.80 9.78 9.76 9.73 9.71 9.69 9.66 9.64
86 9.62 9.60 9.58 9.55 9.53 9.51 9.49 9.47 9.44 9.42
87 9.40 9.38 9.36 9.34 9.31 9.29 9.27 9.25 9.23 9.21
88 9.19 9.17 9.15 9.13 9.10 9.08 9.06 9.04 9.02 9.00
89 8.98 8.96 8.94 8.92 8.90 8.88 8.86 8.84 8.82 8.80
90 8.78 8.76 8.75 8.73 8.71 8.69 8.67 8.65 8.63 8.61
91 8.59 8.57 8.55 8.54 8.52 8.50 8.48 8.46 8.44 8.42
92 8.41 8.39 8.37 8.35 8.33 8.32 8.30 8.28 8.26 8.24
93 8.23 8.21 8.19 8.17 8.16 8.14 8.12 8.10 8.09 8.07
94 8.05 8.04 8.02 8.00 7.98 7.97 7.95 7.93 7.92 7.90
2

Load 10gf (0.01kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
6 3953 3824 3702 3585 3474 3368 3267 3170 3077 2989
7 2904 2823 2745 2670 2599 2530 2464 2400 2339 2280
8 2223 2169 2116 2066 2017 1970 1924 1880 1838 1796
9 1757 1718 1681 1645 1610 1577 1544 1512 1482 1452
10 1423 1395 1368 1341 1316 1291 1266 1243 1220 1198
11 1176 1155 1134 1114 1095 1076 1058 1040 1022 1005
12 988 972 956 941 925 911 896 882 869 855
13 842 829 817 804 792 781 769 758 747 737
14 726 716 706 696 686 677 668 659 650 641
15 632 624 616 608 600 592 585 577 570 563
16 556 549 542 536 529 523 516 510 504 498
17 492 487 481 475 470 465 459 454 449 444
18 439 434 430 425 420 416 411 407 403 398
19 394 390 386 382 378 374 370 367 363 359
20 356 352 349 345 342 339 335 332 329 326
21 323 320 317 314 311 308 305 302 299 297
22 294 291 289 286 284 281 279 276 274 271
23 269 267 264 262 260 258 255 253 251 249
24 247 245 243 241 239 237 235 233 231 230
25 228 226 224 222 221 219 217 215 214 212
26 211 209 207 206 204 203 201 200 198 197
27 195 194 192 191 190 188 187 185 184 183
28 182 180 179 178 176 175 174 173 172 170
29 169 168 167 166 165 164 162 161 160 159
30 158 157 156 155 154 153 152 151 150 149
31 148 147 146 145 144 143 143 142 141 140
32 139 138 137 136 136 135 134 133 132 131
33 131 130 129 128 128 127 126 125 125 124
34 123 122 122 121 120 120 119 118 118 117
35 116 116 115 114 114 113 112 112 111 110
36 110 109 109 108 107 107 106 106 105 105
37 104 103 103 102 102 101 101 100 99.6 99.1
38 98.5 98.0 97.5 97.0 96.5 96.0 95.5 95.0 94.5 94.0
39 93.6 93.1 92.6 92.1 91.7 91.2 90.7 90.3 89.8 89.4
40 88.9 88.5 88.1 87.6 87.2 86.8 86.3 85.9 85.5 85.1
41 84.7 84.2 83.8 83.4 83.0 82.6 82.2 81.8 81.4 81.1
42 80.7 80.3 79.9 79.5 79.2 78.8 78.4 78.0 77.7 77.3
43 77.0 76.6 76.2 75.9 75.5 75.2 74.9 74.5 74.2 73.8
44 73.5 73.2 72.8 72.5 72.2 71.9 71.5 71.2 70.9 70.6
45 70.3 70.0 69.7 69.3 69.0 68.7 68.4 68.1 67.8 67.5
46 67.2 67.0 66.7 66.4 66.1 65.8 65.5 65.2 65.0 64.7
47 64.4 64.1 63.9 63.6 63.3 63.1 62.8 62.5 62.3 62.0
48 61.8 61.5 61.3 61.0 60.7 60.5 60.2 60.0 59.8 59.5
49 59.3 59.0 58.8 58.5 58.3 58.1 57.8 57.6 57.4 57.1
50 56.9 56.7 56.5 56.2 56.0 55.8 55.6 55.4 55.1 54.9
51 54.7 54.5 54.3 54.1 53.9 53.7 53.4 53.2 53.0 52.8
3

Load 10gf (0.01kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
52 52.6 52.4 52.2 52.0 51.8 51.6 51.4 51.2 51.0 50.9
53 50.7 50.5 50.3 50.1 49.9 49.7 49.5 49.3 49.2 49.0
54 48.8 48.6 48.4 48.3 48.1 47.9 47.7 47.6 47.4 47.2
55 47.0 46.9 46.7 46.5 46.4 46.2 46.0 45.9 45.7 45.5
56 45.4 45.2 45.1 44.9 44.7 44.6 44.4 44.3 44.1 44.0
57 43.8 43.6 43.5 43.3 43.2 43.0 42.9 42.7 42.6 42.4
58 42.3 42.2 42.0 41.9 41.7 41.6 41.4 41.3 41.2 41.0
59 40.9 40.7 40.6 40.5 40.3 40.2 40.1 39.9 39.8 39.7
60 39.5 39.4 39.3 39.1 39.0 38.9 38.7 38.6 38.5 38.4
61 38.2 38.1 38.0 37.9 37.7 37.6 37.5 37.4 37.3 37.1
62 37.0 36.9 36.8 36.7 36.5 36.4 36.3 36.2 36.1 36.0
63 35.9 35.7 35.6 35.5 35.4 35.3 35.2 35.1 35.0 34.9
64 34.7 34.6 34.5 34.4 34.3 34.2 34.1 34.0 33.9 33.8
65 33.7 33.6 33.5 33.4 33.3 33.2 33.1 33.0 32.9 32.8
66 32.7 32.6 32.5 32.4 32.3 32.2 32.1 32.0 31.9 31.8
67 31.7 31.6 31.5 31.4 31.3 31.2 31.1 31.0 31.0 30.9
68 30.8 30.7 30.6 30.5 30.4 30.3 30.2 30.2 30.1 30.0
69 29.9 29.8 29.7 29.6 29.5 29.5 29.4 29.3 29.2 29.1
70 29.0 29.0 28.9 28.8 28.7 28.6 28.5 28.5 28.4 28.3
71 28.2 28.1 28.1 28.0 27.9 27.8 27.8 27.7 27.6 27.5
72 27.4 27.4 27.3 27.2 27.1 27.1 27.0 26.9 26.8 26.8
73 26.7 26.6 26.6 26.5 26.4 26.3 26.3 26.2 26.1 26.1
74 26.0 25.9 25.8 25.8 25.7 25.6 25.6 25.5 25.4 25.4
75 25.3 25.2 25.2 25.1 25.0 25.0 24.9 24.8 24.8 24.7
76 24.6 24.6 24.5 24.4 24.4 24.3 24.3 24.2 24.1 24.1
77 24.0 23.9 23.9 23.8 23.8 23.7 23.6 23.6 23.5 23.4
78 23.4 23.3 23.3 23.2 23.2 23.1 23.0 23.0 22.9 22.9
79 22.8 22.7 22.7 22.6 22.6 22.5 22.5 22.4 22.3 22.3
80 22.2 22.2 22.1 22.1 22.0 22.0 21.9 21.9 21.8 21.7
81 21.7 21.6 21.6 21.5 21.5 21.4 21.4 21.3 21.3 21.2
82 21.2 21.1 21.1 21.0 21.0 20.9 20.9 20.8 20.8 20.7
83 20.7 20.6 20.6 20.5 20.5 20.4 20.4 20.3 20.3 20.2
84 20.2 20.1 20.1 20.0 20.0 19.9 19.9 19.8 19.8 19.7
85 19.7 19.6 19.6 19.6 19.5 19.5 19.4 19.4 19.3 19.3
86 19.2 19.2 19.2 19.1 19.1 19.0 19.0 18.9 18.9 18.8
87 18.8 18.8 18.7 18.7 18.6 18.6 18.5 18.5 18.5 18.4
88 18.4 18.3 18.3 18.3 18.2 18.2 18.1 18.1 18.0 18.0
89 18.0 17.9 17.9 17.8 17.8 17.8 17.7 17.7 17.6 17.6
90 17.6 17.5 17.5 17.5 17.4 17.4 17.3 17.3 17.3 17.2
91 17.2 17.1 17.1 17.1 17.0 17.0 17.0 16.9 16.9 16.8
92 16.8 16.8 16.7 16.7 16.7 16.6 16.6 16.6 16.5 16.5
93 16.5 16.4 16.4 16.3 16.3 16.3 16.2 16.2 16.2 16.1
94 16.1 16.1 16.0 16.0 16.0 15.9 15.9 15.9 15.8 15.8
95 15.8 15.7 15.7 15.7 15.6 15.6 15.6 15.5 15.5 15.5
96 15.4 15.4 15.4 15.3 15.3 15.3 15.2 15.2 15.2 15.2
4

Load 25gf (0.025kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
12 2470 2430 2390 2351 2314 2277 2241 2206 2171 2138
13 2105 2073 2042 2011 1981 1952 1923 1895 1868 1841
14 1815 1789 1764 1740 1716 1692 1669 1646 1624 1602
15 1581 1560 1540 1520 1500 1481 1462 1443 1425 1407
16 1390 1372 1356 1339 1323 1307 1291 1276 1260 1246
17 1231 1217 1203 1189 1175 1162 1148 1136 1123 1110
18 1098 1086 1074 1062 1051 1039 1028 1017 1007 996
19 985 975 965 955 945 936 926 917 907 898
20 889 881 872 863 855 847 838 830 822 814
21 807 799 792 784 777 770 762 755 749 742
22 735 728 722 715 709 703 697 690 684 678
23 672 667 661 655 650 644 639 633 628 623
24 618 613 607 602 598 593 588 583 578 574
25 569 565 560 556 551 547 543 539 534 530
26 526 522 518 514 510 507 503 499 495 492
27 488 484 481 477 474 470 467 464 460 457
28 454 451 447 444 441 438 435 432 429 426
29 423 420 417 414 412 409 406 403 401 398
30 395 393 390 387 385 382 380 377 375 373
31 370 368 365 363 361 359 356 354 352 350
32 347 345 343 341 339 337 335 333 331 329
33 327 325 323 321 319 317 315 313 311 310
34 308 306 304 302 301 299 297 295 294 292
35 290 289 287 285 284 282 281 279 278 276
36 274 273 271 270 268 267 266 264 263 261
37 260 258 257 256 254 253 252 250 249 248
38 246 245 244 243 241 240 239 238 236 235
39 234 233 232 230 229 228 227 226 225 223
40 222 221 220 219 218 217 216 215 214 213
41 212 211 210 209 208 207 206 205 204 203
42 202 201 200 199 198 197 196 195 194 193
43 192 192 191 190 189 188 187 186 185 185
44 184 183 182 181 180 180 179 178 177 176
45 176 175 174 173 173 172 171 170 170 169
46 168 167 167 166 165 165 164 163 162 162
47 161 160 160 159 158 158 157 156 156 155
48 154 154 153 152 152 151 151 150 149 149
49 148 148 147 146 146 145 145 144 143 143
50 142 142 141 141 140 139 139 138 138 137
51 137 136 136 135 135 134 134 133 133 132
52 132 131 131 130 130 129 129 128 128 127
53 127 126 126 125 125 124 124 123 123 122
54 122 122 121 121 120 120 119 119 118 118
55 118 117 117 116 116 115 115 115 114 114
56 113 113 113 112 112 111 111 111 110 110
57 109 109 109 108 108 108 107 107 106 106
5

Load 25gf (0.025kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
58 106 105 105 105 104 104 104 103 103 103
59 102 102 102 101 101 100 100 99.8 99.5 99.1
60 98.8 98.5 98.2 97.8 97.5 97.2 96.9 96.6 96.2 95.9
61 95.6 95.3 95.0 94.7 94.4 94.1 93.8 93.4 93.1 92.8
62 92.5 92.2 92.0 91.7 91.4 91.1 90.8 90.5 90.2 89.9
63 89.6 89.3 89.1 88.8 88.5 88.2 87.9 87.7 87.4 87.1
64 86.9 86.6 86.3 86.0 85.8 85.5 85.2 85.0 84.7 84.5
65 84.2 83.9 83.7 83.4 83.2 82.9 82.7 82.4 82.2 81.9
66 81.7 81.4 81.2 80.9 80.7 80.4 80.2 80.0 79.7 79.5
67 79.2 79.0 78.8 78.5 78.3 78.1 77.8 77.6 77.4 77.2
68 76.9 76.7 76.5 76.3 76.0 75.8 75.6 75.4 75.2 74.9
69 74.7 74.5 74.3 74.1 73.9 73.7 73.4 73.2 73.0 72.8
70 72.6 72.4 72.2 72.0 71.8 71.6 71.4 71.2 71.0 70.8
71 70.6 70.4 70.2 70.0 69.8 69.6 69.4 69.2 69.0 68.8
72 68.6 68.4 68.2 68.1 67.9 67.7 67.5 67.3 67.1 66.9
73 66.8 66.6 66.4 66.2 66.0 65.9 65.7 65.5 65.3 65.1
74 65.0 64.8 64.6 64.4 64.3 64.1 63.9 63.8 63.6 63.4
75 63.2 63.1 62.9 62.7 62.6 62.4 62.2 62.1 61.9 61.8
76 61.6 61.4 61.3 61.1 60.9 60.8 60.6 60.5 60.3 60.2
77 60.0 59.8 59.7 59.5 59.4 59.2 59.1 58.9 58.8 58.6
78 58.5 58.3 58.2 58.0 57.9 57.7 57.6 57.4 57.3 57.1
79 57.0 56.9 56.7 56.6 56.4 56.3 56.1 56.0 55.9 55.7
80 55.6 55.4 55.3 55.2 55.0 54.9 54.8 54.6 54.5 54.4
81 54.2 54.1 54.0 53.8 53.7 53.6 53.4 53.3 53.2 53.0
82 52.9 52.8 52.7 52.5 52.4 52.3 52.1 52.0 51.9 51.8
83 51.6 51.5 51.4 51.3 51.1 51.0 50.9 50.8 50.7 50.5
84 50.4 50.3 50.2 50.1 49.9 49.8 49.7 49.6 49.5 49.4
85 49.2 49.1 49.0 48.9 48.8 48.7 48.6 48.4 48.3 48.2
86 48.1 48.0 47.9 47.8 47.7 47.5 47.4 47.3 47.2 47.1
87 47.0 46.9 46.8 46.7 46.6 46.5 46.4 46.3 46.1 46.0
88 45.9 45.8 45.7 45.6 45.5 45.4 45.3 45.2 45.1 45.0
89 44.9 44.8 44.7 44.6 44.5 44.4 44.3 44.2 44.1 44.0
90 43.9 43.8 43.7 43.6 43.5 43.4 43.3 43.2 43.1 43.1
91 43.0 42.9 42.8 42.7 42.6 42.5 42.4 42.3 42.2 42.1
92 42.0 41.9 41.8 41.8 41.7 41.6 41.5 41.4 41.3 41.2
93 41.1 41.0 41.0 40.9 40.8 40.7 40.6 40.5 40.4 40.3
94 40.3 40.2 40.1 40.0 39.9 39.8 39.8 39.7 39.6 39.5
95 39.4 39.3 39.3 39.2 39.1 39.0 38.9 38.8 38.8 38.7
96 38.6 38.5 38.4 38.4 38.3 38.2 38.1 38.0 38.0 37.9
97 37.8 37.7 37.7 37.6 37.5 37.4 37.3 37.3 37.2 37.1
98 37.0 37.0 36.9 36.8 36.7 36.7 36.6 36.5 36.4 36.4
99 36.3 36.2 36.2 36.1 36.0 35.9 35.9 35.8 35.7 35.6
100 35.6 35.5 35.4 35.4 35.3 35.2 35.2 35.1 35.0 34.9
101 34.9 34.8 34.7 34.7 34.6 34.5 34.5 34.4 34.3 34.3
102 34.2 34.1 34.1 34.0 33.9 33.9 33.8 33.7 33.7 33.6
103 33.5 33.5 33.4 33.3 33.3 33.2 33.1 33.1 33.0 33.0
6

Load 25gf (0.025kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
104 32.9 32.8 32.8 32.7 32.6 32.6 32.5 32.5 32.4 32.3
105 32.3 32.2 32.1 32.1 32.0 32.0 31.9 31.8 31.8 31.7
106 31.7 31.6 31.5 31.5 31.4 31.4 31.3 31.2 31.2 31.1
107 31.1 31.0 31.0 30.9 30.8 30.8 30.7 30.7 30.6 30.6
108 30.5 30.4 30.4 30.3 30.3 30.2 30.2 30.1 30.1 30.0
109 29.9 29.9 29.8 29.8 29.7 29.7 29.6 29.6 29.5 29.5
110 29.4 29.3 29.3 29.2 29.2 29.1 29.1 29.0 29.0 28.9
111 28.9 28.8 28.8 28.7 28.7 28.6 28.6 28.5 28.5 28.4
112 28.4 28.3 28.3 28.2 28.2 28.1 28.1 28.0 28.0 27.9
113 27.9 27.8 27.8 27.7 27.7 27.6 27.6 27.5 27.5 27.4
114 27.4 27.3 27.3 27.2 27.2 27.1 27.1 27.0 27.0 26.9
115 26.9 26.9 26.8 26.8 26.7 26.7 26.6 26.6 26.5 26.5
116 26.4 26.4 26.3 26.3 26.3 26.2 26.2 26.1 26.1 26.0
117 26.0 25.9 25.9 25.9 25.8 25.8 25.7 25.7 25.6 25.6
118 25.5 25.5 25.5 25.4 25.4 25.3 25.3 25.2 25.2 25.2
119 25.1 25.1 25.0 25.0 25.0 24.9 24.9 24.8 24.8 24.7
120 24.7 24.7 24.6 24.6 24.5 24.5 24.5 24.4 24.4 24.3
121 24.3 24.3 24.2 24.2 24.1 24.1 24.1 24.0 24.0 23.9
122 23.9 23.9 23.8 23.8 23.7 23.7 23.7 23.6 23.6 23.6
123 23.5 23.5 23.4 23.4 23.4 23.3 23.3 23.2 23.2 23.2
124 23.1 23.1 23.1 23.0 23.0 23.0 22.9 22.9 22.8 22.8
125 22.8 22.7 22.7 22.7 22.6 22.6 22.6 22.5 22.5 22.4
126 22.4 22.4 22.3 22.3 22.3 22.2 22.2 22.2 22.1 22.1
127 22.1 22.0 22.0 22.0 21.9 21.9 21.8 21.8 21.8 21.7
128 21.7 21.7 21.6 21.6 21.6 21.5 21.5 21.5 21.4 21.4
129 21.4 21.3 21.3 21.3 21.2 21.2 21.2 21.1 21.1 21.1
130 21.1 21.0 21.0 21.0 20.9 20.9 20.9 20.8 20.8 20.8
131 20.7 20.7 20.7 20.6 20.6 20.6 20.5 20.5 20.5 20.4
132 20.4 20.4 20.4 20.3 20.3 20.3 20.2 20.2 20.2 20.1
133 20.1 20.1 20.1 20.0 20.0 20.0 19.9 19.9 19.9 19.8
134 19.8 19.8 19.8 19.7 19.7 19.7 19.6 19.6 19.6 19.5
135 19.5 19.5 19.5 19.4 19.4 19.4 19.3 19.3 19.3 19.3
136 19.2 19.2 19.2 19.1 19.1 19.1 19.1 19.0 19.0 19.0
137 19.0 18.9 18.9 18.9 18.8 18.8 18.8 18.8 18.7 18.7
138 18.7 18.7 18.6 18.6 18.6 18.5 18.5 18.5 18.5 18.4
139 18.4 18.4 18.4 18.3 18.3 18.3 18.3 18.2 18.2 18.2
140 18.2 18.1 18.1 18.1 18.0 18.0 18.0 18.0 17.9 17.9
141 17.9 17.9 17.8 17.8 17.8 17.8 17.7 17.7 17.7 17.7
142 17.6 17.6 17.6 17.6 17.5 17.5 17.5 17.5 17.4 17.4
143 17.4 17.4 17.3 17.3 17.3 17.3 17.3 17.2 17.2 17.2
144 17.2 17.1 17.1 17.1 17.1 17.0 17.0 17.0 17.0 16.9
145 16.9 16.9 16.9 16.9 16.8 16.8 16.8 16.8 16.7 16.7
146 16.7 16.7 16.6 16.6 16.6 16.6 16.6 16.5 16.5 16.5
147 16.5 16.4 16.4 16.4 16.4 16.4 16.3 16.3 16.3 16.3
148 16.2 16.2 16.2 16.2 16.2 16.1 16.1 16.1 16.1 16.0
149 16.0 16.0 16.0 16.0 15.9 15.9 15.9 15.9 15.9 15.8
7

Load 50gf (0.05kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
17 2462 2433 2405 2377 2350 2323 2297 2271 2246 2221
18 2196 2172 2148 2125 2102 2079 2057 2035 2013 1992
19 1971 1950 1930 1910 1890 1871 1852 1833 1815 1797
20 1779 1761 1744 1727 1710 1693 1677 1660 1645 1629
21 1613 1598 1583 1568 1554 1539 1525 1511 1497 1483
22 1470 1457 1444 1431 1418 1405 1393 1381 1369 1357
23 1345 1333 1322 1311 1299 1288 1277 1267 1256 1246
24 1235 1225 1215 1205 1195 1185 1176 1166 1157 1148
25 1138 1129 1120 1112 1103 1094 1086 1077 1069 1061
26 1053 1044 1037 1029 1021 1013 1006 998 991 983
27 976 969 962 955 948 941 934 927 921 914
28 908 901 895 888 882 876 870 864 858 852
29 846 840 834 829 823 818 812 807 801 796
30 791 785 780 775 770 765 760 755 750 745
31 740 736 731 726 722 717 713 708 704 699
32 695 691 686 682 678 674 669 665 661 657
33 653 649 646 642 638 634 630 626 623 619
34 615 612 608 605 601 598 594 591 588 584
35 581 578 574 571 568 565 561 558 555 552
36 549 546 543 540 537 534 531 528 525 523
37 520 517 514 511 509 506 503 501 498 495
38 493 490 488 485 483 480 478 475 473 470
39 468 465 463 461 458 456 454 451 449 447
40 445 442 440 438 436 434 432 430 427 425
41 423 421 419 417 415 413 411 409 407 405
42 403 401 400 398 396 394 392 390 388 387
43 385 383 381 379 378 376 374 373 371 369
44 368 366 364 363 361 359 358 356 355 353
45 351 350 348 347 345 344 342 341 339 338
46 336 335 333 332 330 329 328 326 325 323
47 322 321 319 318 317 315 314 313 311 310
48 309 308 306 305 304 302 301 300 299 298
49 296 295 294 293 292 290 289 288 287 286
50 285 283 282 281 280 279 278 277 276 275
51 274 272 271 270 269 268 267 266 265 264
52 263 262 261 260 259 258 257 256 255 254
53 253 252 251 250 250 249 248 247 246 245
54 244 243 242 241 240 240 239 238 237 236
55 235 234 234 233 232 231 230 229 229 228
56 227 226 225 224 224 223 222 221 221 220
57 219 218 217 217 216 215 214 214 213 212
58 212 211 210 209 209 208 207 206 206 205
59 204 204 203 202 202 201 200 200 199 198
60 198 197 196 196 195 194 194 193 192 192
61 191 191 190 189 189 188 188 187 186 186
62 185 184 184 183 183 182 182 181 180 180
8

Load 50gf (0.05kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
63 179 179 178 178 177 176 176 175 175 174
64 174 173 173 172 172 171 170 170 169 169
65 168 168 167 167 166 166 165 165 164 164
66 163 163 162 162 161 161 160 160 159 159
67 158 158 158 157 157 156 156 155 155 154
68 154 153 153 153 152 152 151 151 150 150
69 149 149 149 148 148 147 147 146 146 146
70 145 145 144 144 144 143 143 142 142 142
71 141 141 140 140 140 139 139 138 138 138
72 137 137 136 136 136 135 135 135 134 134
73 134 133 133 132 132 132 131 131 131 130
74 130 130 129 129 129 128 128 128 127 127
75 126 126 126 125 125 125 124 124 124 124
76 123 123 123 122 122 122 121 121 121 120
77 120 120 119 119 119 118 118 118 118 117
78 117 117 116 116 116 115 115 115 115 114
79 114 114 113 113 113 113 112 112 112 111
80 111 111 111 110 110 110 110 109 109 109
81 108 108 108 108 107 107 107 107 106 106
82 106 106 105 105 105 105 104 104 104 104
83 103 103 103 103 102 102 102 102 101 101
84 101 101 100 100 99.9 99.6 99.4 99.2 98.9 98.7
85 98.5 98.2 98.0 97.8 97.6 97.3 97.1 96.9 96.6 96.4
86 96.2 96.0 95.8 95.5 95.3 95.1 94.9 94.7 94.4 94.2
87 94.0 93.8 93.6 93.4 93.1 92.9 92.7 92.5 92.3 92.1
88 91.9 91.7 91.5 91.3 91.0 90.8 90.6 90.4 90.2 90.0
89 89.8 89.6 89.4 89.2 89.0 88.8 88.6 88.4 88.2 88.0
90 87.8 87.6 87.5 87.3 87.1 86.9 86.7 86.5 86.3 86.1
91 85.9 85.7 85.5 85.4 85.2 85.0 84.8 84.6 84.4 84.2
92 84.1 83.9 83.7 83.5 83.3 83.2 83.0 82.8 82.6 82.4
93 82.3 82.1 81.9 81.7 81.6 81.4 81.2 81.0 80.9 80.7
94 80.5 80.4 80.2 80.0 79.8 79.7 79.5 79.3 79.2 79.0
95 78.8 78.7 78.5 78.3 78.2 78.0 77.9 77.7 77.5 77.4
96 77.2 77.0 76.9 76.7 76.6 76.4 76.2 76.1 75.9 75.8
97 75.6 75.5 75.3 75.2 75.0 74.8 74.7 74.5 74.4 74.2
98 74.1 73.9 73.8 73.6 73.5 73.3 73.2 73.0 72.9 72.7
99 72.6 72.4 72.3 72.2 72.0 71.9 71.7 71.6 71.4 71.3
100 71.2 71.0 70.9 70.7 70.6 70.4 70.3 70.2 70.0 69.9
101 69.7 69.6 69.5 69.3 69.2 69.1 68.9 68.8 68.7 68.5
102 68.4 68.3 68.1 68.0 67.9 67.7 67.6 67.5 67.3 67.2
103 67.1 66.9 66.8 66.7 66.5 66.4 66.3 66.2 66.0 65.9
104 65.8 65.7 65.5 65.4 65.3 65.2 65.0 64.9 64.8 64.7
105 64.5 64.4 64.3 64.2 64.0 63.9 63.8 63.7 63.6 63.4
106 63.3 63.2 63.1 63.0 62.8 62.7 62.6 62.5 62.4 62.3
107 62.1 62.0 61.9 61.8 61.7 61.6 61.5 61.3 61.2 61.1
108 61.0 60.9 60.8 60.7 60.6 60.4 60.3 60.2 60.1 60.0
9

Load 50gf (0.05kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
109 59.9 59.8 59.7 59.6 59.4 59.3 59.2 59.1 59.0 58.9
110 58.8 58.7 58.6 58.5 58.4 58.3 58.2 58.1 58.0 57.9
111 57.7 57.6 57.5 57.4 57.3 57.2 57.1 57.0 56.9 56.8
112 56.7 56.6 56.5 56.4 56.3 56.2 56.1 56.0 55.9 55.8
113 55.7 55.6 55.5 55.4 55.3 55.2 55.1 55.0 54.9 54.8
114 54.7 54.7 54.6 54.5 54.4 54.3 54.2 54.1 54.0 53.9
115 53.8 53.7 53.6 53.5 53.4 53.3 53.2 53.2 53.1 53.0
116 52.9 52.8 52.7 52.6 52.5 52.4 52.3 52.2 52.2 52.1
117 52.0 51.9 51.8 51.7 51.6 51.5 51.4 51.4 51.3 51.2
118 51.1 51.0 50.9 50.8 50.8 50.7 50.6 50.5 50.4 50.3
119 50.2 50.2 50.1 50.0 49.9 49.8 49.7 49.7 49.6 49.5
120 49.4 49.3 49.2 49.2 49.1 49.0 48.9 48.8 48.8 48.7
121 48.6 48.5 48.4 48.4 48.3 48.2 48.1 48.0 48.0 47.9
122 47.8 47.7 47.6 47.6 47.5 47.4 47.3 47.3 47.2 47.1
123 47.0 47.0 46.9 46.8 46.7 46.6 46.6 46.5 46.4 46.3
124 46.3 46.2 46.1 46.1 46.0 45.9 45.8 45.8 45.7 45.6
125 45.5 45.5 45.4 45.3 45.2 45.2 45.1 45.0 45.0 44.9
126 44.8 44.7 44.7 44.6 44.5 44.5 44.4 44.3 44.3 44.2
127 44.1 44.0 44.0 43.9 43.8 43.8 43.7 43.6 43.6 43.5
128 43.4 43.4 43.3 43.2 43.2 43.1 43.0 43.0 42.9 42.8
129 42.8 42.7 42.6 42.6 42.5 42.4 42.4 42.3 42.2 42.2
130 42.1 42.0 42.0 41.9 41.8 41.8 41.7 41.7 41.6 41.5
131 41.5 41.4 41.3 41.3 41.2 41.1 41.1 41.0 41.0 40.9
132 40.8 40.8 40.7 40.6 40.6 40.5 40.5 40.4 40.3 40.3
133 40.2 40.2 40.1 40.0 40.0 39.9 39.9 39.8 39.7 39.7
134 39.6 39.6 39.5 39.4 39.4 39.3 39.3 39.2 39.2 39.1
135 39.0 39.0 38.9 38.9 38.8 38.8 38.7 38.6 38.6 38.5
136 38.5 38.4 38.4 38.3 38.2 38.2 38.1 38.1 38.0 38.0
137 37.9 37.9 37.8 37.7 37.7 37.6 37.6 37.5 37.5 37.4
138 37.4 37.3 37.3 37.2 37.1 37.1 37.0 37.0 36.9 36.9
139 36.8 36.8 36.7 36.7 36.6 36.6 36.5 36.5 36.4 36.4
140 36.3 36.2 36.2 36.1 36.1 36.0 36.0 35.9 35.9 35.8
141 35.8 35.7 35.7 35.6 35.6 35.5 35.5 35.4 35.4 35.3
142 35.3 35.2 35.2 35.1 35.1 35.0 35.0 34.9 34.9 34.8
143 34.8 34.7 34.7 34.6 34.6 34.6 34.5 34.5 34.4 34.4
144 34.3 34.3 34.2 34.2 34.1 34.1 34.0 34.0 33.9 33.9
145 33.8 33.8 33.7 33.7 33.7 33.6 33.6 33.5 33.5 33.4
146 33.4 33.3 33.3 33.2 33.2 33.2 33.1 33.1 33.0 33.0
147 32.9 32.9 32.8 32.8 32.7 32.7 32.7 32.6 32.6 32.5
148 32.5 32.4 32.4 32.4 32.3 32.3 32.2 32.2 32.1 32.1
149 32.0 32.0 32.0 31.9 31.9 31.8 31.8 31.7 31.7 31.7
150 31.6 31.6 31.5 31.5 31.5 31.4 31.4 31.3 31.3 31.2
151 31.2 31.2 31.1 31.1 31.0 31.0 31.0 30.9 30.9 30.8
152 30.8 30.8 30.7 30.7 30.6 30.6 30.6 30.5 30.5 30.4
153 30.4 30.4 30.3 30.3 30.2 30.2 30.2 30.1 30.1 30.0
154 30.0 30.0 29.9 29.9 29.8 29.8 29.8 29.7 29.7 29.7
10

Load 50gf (0.05kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
155 29.6 29.6 29.5 29.5 29.5 29.4 29.4 29.3 29.3 29.3
156 29.2 29.2 29.2 29.1 29.1 29.1 29.0 29.0 28.9 28.9
157 28.9 28.8 28.8 28.8 28.7 28.7 28.6 28.6 28.6 28.5
158 28.5 28.5 28.4 28.4 28.4 28.3 28.3 28.3 28.2 28.2
159 28.1 28.1 28.1 28.0 28.0 28.0 27.9 27.9 27.9 27.8
160 27.8 27.8 27.7 27.7 27.7 27.6 27.6 27.6 27.5 27.5
161 27.4 27.4 27.4 27.3 27.3 27.3 27.2 27.2 27.2 27.1
162 27.1 27.1 27.0 27.0 27.0 26.9 26.9 26.9 26.8 26.8
163 26.8 26.7 26.7 26.7 26.6 26.6 26.6 26.6 26.5 26.5
164 26.5 26.4 26.4 26.4 26.3 26.3 26.3 26.2 26.2 26.2
165 26.1 26.1 26.1 26.0 26.0 26.0 25.9 25.9 25.9 25.9
166 25.8 25.8 25.8 25.7 25.7 25.7 25.6 25.6 25.6 25.5
167 25.5 25.5 25.5 25.4 25.4 25.4 25.3 25.3 25.3 25.2
168 25.2 25.2 25.1 25.1 25.1 25.1 25.0 25.0 25.0 24.9
169 24.9 24.9 24.9 24.8 24.8 24.8 24.7 24.7 24.7 24.6
170 24.6 24.6 24.6 24.5 24.5 24.5 24.4 24.4 24.4 24.4
171 24.3 24.3 24.3 24.2 24.2 24.2 24.2 24.1 24.1 24.1
172 24.1 24.0 24.0 24.0 23.9 23.9 23.9 23.9 23.8 23.8
173 23.8 23.7 23.7 23.7 23.7 23.6 23.6 23.6 23.6 23.5
174 23.5 23.5 23.4 23.4 23.4 23.4 23.3 23.3 23.3 23.3
175 23.2 23.2 23.2 23.2 23.1 23.1 23.1 23.0 23.0 23.0
176 23.0 22.9 22.9 22.9 22.9 22.8 22.8 22.8 22.8 22.7
177 22.7 22.7 22.7 22.6 22.6 22.6 22.6 22.5 22.5 22.5
178 22.5 22.4 22.4 22.4 22.4 22.3 22.3 22.3 22.3 22.2
179 22.2 22.2 22.2 22.1 22.1 22.1 22.1 22.0 22.0 22.0
180 22.0 21.9 21.9 21.9 21.9 21.8 21.8 21.8 21.8 21.7
181 21.7 21.7 21.7 21.6 21.6 21.6 21.6 21.6 21.5 21.5
182 21.5 21.5 21.4 21.4 21.4 21.4 21.3 21.3 21.3 21.3
183 21.2 21.2 21.2 21.2 21.2 21.1 21.1 21.1 21.1 21.0
184 21.0 21.0 21.0 20.9 20.9 20.9 20.9 20.9 20.8 20.8
185 20.8 20.8 20.7 20.7 20.7 20.7 20.7 20.6 20.6 20.6
186 20.6 20.5 20.5 20.5 20.5 20.5 20.4 20.4 20.4 20.4
187 20.3 20.3 20.3 20.3 20.3 20.2 20.2 20.2 20.2 20.2
188 20.1 20.1 20.1 20.1 20.0 20.0 20.0 20.0 20.0 19.9
189 19.9 19.9 19.9 19.9 19.8 19.8 19.8 19.8 19.8 19.7
190 19.7 19.7 19.7 19.6 19.6 19.6 19.6 19.6 19.5 19.5
191 19.5 19.5 19.5 19.4 19.4 19.4 19.4 19.4 19.3 19.3
192 19.3 19.3 19.3 19.2 19.2 19.2 19.2 19.2 19.1 19.1
193 19.1 19.1 19.1 19.0 19.0 19.0 19.0 19.0 18.9 18.9
194 18.9 18.9 18.9 18.8 18.8 18.8 18.8 18.8 18.7 18.7
195 18.7 18.7 18.7 18.7 18.6 18.6 18.6 18.6 18.6 18.5
196 18.5 18.5 18.5 18.5 18.4 18.4 18.4 18.4 18.4 18.4
11

Load 100gf (0.1kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
24 2470 2450 2430 2410 2390 2371 2351 2332 2314 2295
25 2277 2259 2241 2223 2206 2188 2171 2154 2138 2121
26 2105 2089 2073 2057 2042 2026 2011 1996 1981 1967
27 1952 1938 1923 1909 1895 1882 1868 1855 1841 1828
28 1815 1802 1789 1777 1764 1752 1740 1728 1716 1704
29 1692 1680 1669 1658 1646 1635 1624 1613 1602 1592
30 1581 1571 1560 1550 1540 1530 1520 1510 1500 1490
31 1481 1471 1462 1453 1443 1434 1425 1416 1407 1398
32 1390 1381 1372 1364 1356 1347 1339 1331 1323 1315
33 1307 1299 1291 1283 1276 1268 1260 1253 1246 1238
34 1231 1224 1217 1210 1203 1196 1189 1182 1175 1168
35 1162 1155 1148 1142 1136 1129 1123 1117 1110 1104
36 1098 1092 1086 1080 1074 1068 1062 1057 1051 1045
37 1039 1034 1028 1023 1017 1012 1007 1001 996 991
38 985 980 975 970 965 960 955 950 945 940
39 936 931 926 921 917 912 907 903 898 894
40 889 885 881 876 872 868 863 859 855 851
41 847 842 838 834 830 826 822 818 814 811
42 807 803 799 795 792 788 784 780 777 773
43 770 766 762 759 755 752 749 745 742 738
44 735 732 728 725 722 719 715 712 709 706
45 703 700 697 693 690 687 684 681 678 675
46 672 670 667 664 661 658 655 652 650 647
47 644 641 639 636 633 631 628 625 623 620
48 618 615 613 610 607 605 602 600 598 595
49 593 590 588 585 583 581 578 576 574 571
50 569 567 565 562 560 558 556 554 551 549
51 547 545 543 541 539 537 534 532 530 528
52 526 524 522 520 518 516 514 512 510 509
53 507 505 503 501 499 497 495 493 492 490
54 488 486 484 483 481 479 477 476 474 472
55 470 469 467 465 464 462 460 459 457 455
56 454 452 451 449 447 446 444 443 441 440
57 438 436 435 433 432 430 429 427 426 424
58 423 422 420 419 417 416 414 413 412 410
59 409 407 406 405 403 402 401 399 398 397
60 395 394 393 391 390 389 387 386 385 384
61 382 381 380 379 377 376 375 374 373 371
62 370 369 368 367 365 364 363 362 361 360
63 359 357 356 355 354 353 352 351 350 349
64 347 346 345 344 343 342 341 340 339 338
65 337 336 335 334 333 332 331 330 329 328
66 327 326 325 324 323 322 321 320 319 318
67 317 316 315 314 313 312 311 310 310 309
68 308 307 306 305 304 303 302 302 301 300
69 299 298 297 296 295 295 294 293 292 291
12

Load 100gf (0.1kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
70 290 290 289 288 287 286 285 285 284 283
71 282 281 281 280 279 278 278 277 276 275
72 274 274 273 272 271 271 270 269 268 268
73 267 266 266 265 264 263 263 262 261 261
74 260 259 258 258 257 256 256 255 254 254
75 253 252 252 251 250 250 249 248 248 247
76 246 246 245 244 244 243 243 242 241 241
77 240 239 239 238 238 237 236 236 235 234
78 234 233 233 232 232 231 230 230 229 229
79 228 227 227 226 226 225 225 224 223 223
80 222 222 221 221 220 220 219 219 218 217
81 217 216 216 215 215 214 214 213 213 212
82 212 211 211 210 210 209 209 208 208 207
83 207 206 206 205 205 204 204 203 203 202
84 202 201 201 200 200 199 199 198 198 197
85 197 196 196 196 195 195 194 194 193 193
86 192 192 192 191 191 190 190 189 189 188
87 188 188 187 187 186 186 185 185 185 184
88 184 183 183 183 182 182 181 181 180 180
89 180 179 179 178 178 178 177 177 176 176
90 176 175 175 175 174 174 173 173 173 172
91 172 171 171 171 170 170 170 169 169 168
92 168 168 167 167 167 166 166 166 165 165
93 165 164 164 163 163 163 162 162 162 161
94 161 161 160 160 160 159 159 159 158 158
95 158 157 157 157 156 156 156 155 155 155
96 154 154 154 153 153 153 152 152 152 152
97 151 151 151 150 150 150 149 149 149 148
98 148 148 148 147 147 147 146 146 146 145
99 145 145 145 144 144 144 143 143 143 143
100 142 142 142 141 141 141 141 140 140 140
101 139 139 139 139 138 138 138 138 137 137
102 137 137 136 136 136 135 135 135 135 134
103 134 134 134 133 133 133 133 132 132 132
104 132 131 131 131 131 130 130 130 130 129
105 129 129 129 128 128 128 128 127 127 127
106 127 126 126 126 126 125 125 125 125 125
107 124 124 124 124 123 123 123 123 122 122
108 122 122 122 121 121 121 121 120 120 120
109 120 120 119 119 119 119 118 118 118 118
110 118 117 117 117 117 117 116 116 116 116
111 115 115 115 115 115 114 114 114 114 114
112 113 113 113 113 113 112 112 112 112 112
113 111 111 111 111 111 110 110 110 110 110
114 109 109 109 109 109 109 108 108 108 108
115 108 107 107 107 107 107 106 106 106 106
13

Load 100gf (0.1kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
116 106 106 105 105 105 105 105 104 104 104
117 104 104 104 103 103 103 103 103 103 102
118 102 102 102 102 102 101 101 101 101 101
119 100 100 100 100 99.8 99.6 99.5 99.3 99.1 99.0
120 98.8 98.7 98.5 98.3 98.2 98.0 97.8 97.7 97.5 97.4
121 97.2 97.0 96.9 96.7 96.6 96.4 96.2 96.1 95.9 95.8
122 95.6 95.4 95.3 95.1 95.0 94.8 94.7 94.5 94.4 94.2
123 94.1 93.9 93.8 93.6 93.4 93.3 93.1 93.0 92.8 92.7
124 92.5 92.4 92.2 92.1 92.0 91.8 91.7 91.5 91.4 91.2
125 91.1 90.9 90.8 90.6 90.5 90.3 90.2 90.1 89.9 89.8
126 89.6 89.5 89.3 89.2 89.1 88.9 88.8 88.6 88.5 88.4
127 88.2 88.1 87.9 87.8 87.7 87.5 87.4 87.3 87.1 87.0
128 86.9 86.7 86.6 86.4 86.3 86.2 86.0 85.9 85.8 85.6
129 85.5 85.4 85.2 85.1 85.0 84.9 84.7 84.6 84.5 84.3
130 84.2 84.1 83.9 83.8 83.7 83.6 83.4 83.3 83.2 83.0
131 82.9 82.8 82.7 82.5 82.4 82.3 82.2 82.0 81.9 81.8
132 81.7 81.5 81.4 81.3 81.2 81.1 80.9 80.8 80.7 80.6
133 80.4 80.3 80.2 80.1 80.0 79.8 79.7 79.6 79.5 79.4
134 79.2 79.1 79.0 78.9 78.8 78.7 78.5 78.4 78.3 78.2
135 78.1 78.0 77.8 77.7 77.6 77.5 77.4 77.3 77.2 77.0
136 76.9 76.8 76.7 76.6 76.5 76.4 76.3 76.1 76.0 75.9
137 75.8 75.7 75.6 75.5 75.4 75.3 75.2 75.0 74.9 74.8
138 74.7 74.6 74.5 74.4 74.3 74.2 74.1 74.0 73.9 73.8
139 73.7 73.5 73.4 73.3 73.2 73.1 73.0 72.9 72.8 72.7
140 72.6 72.5 72.4 72.3 72.2 72.1 72.0 71.9 71.8 71.7
141 71.6 71.5 71.4 71.3 71.2 71.1 71.0 70.9 70.8 70.7
142 70.6 70.5 70.4 70.3 70.2 70.1 70.0 69.9 69.8 69.7
143 69.6 69.5 69.4 69.3 69.2 69.1 69.0 68.9 68.8 68.7
144 68.6 68.5 68.4 68.3 68.2 68.2 68.1 68.0 67.9 67.8
145 67.7 67.6 67.5 67.4 67.3 67.2 67.1 67.0 66.9 66.8
146 66.8 66.7 66.6 66.5 66.4 66.3 66.2 66.1 66.0 65.9
147 65.9 65.8 65.7 65.6 65.5 65.4 65.3 65.2 65.1 65.1
148 65.0 64.9 64.8 64.7 64.6 64.5 64.4 64.4 64.3 64.2
149 64.1 64.0 63.9 63.8 63.8 63.7 63.6 63.5 63.4 63.3
150 63.2 63.2 63.1 63.0 62.9 62.8 62.7 62.7 62.6 62.5
151 62.4 62.3 62.2 62.2 62.1 62.0 61.9 61.8 61.8 61.7
152 61.6 61.5 61.4 61.3 61.3 61.2 61.1 61.0 60.9 60.9
153 60.8 60.7 60.6 60.6 60.5 60.4 60.3 60.2 60.2 60.1
154 60.0 59.9 59.8 59.8 59.7 59.6 59.5 59.5 59.4 59.3
155 59.2 59.2 59.1 59.0 58.9 58.8 58.8 58.7 58.6 58.5
156 58.5 58.4 58.3 58.2 58.2 58.1 58.0 58.0 57.9 57.8
157 57.7 57.7 57.6 57.5 57.4 57.4 57.3 57.2 57.1 57.1
158 57.0 56.9 56.9 56.8 56.7 56.6 56.6 56.5 56.4 56.4
159 56.3 56.2 56.1 56.1 56.0 55.9 55.9 55.8 55.7 55.7
160 55.6 55.5 55.4 55.4 55.3 55.2 55.2 55.1 55.0 55.0
161 54.9 54.8 54.8 54.7 54.6 54.6 54.5 54.4 54.4 54.3
14

Load 100gf (0.1kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
162 54.2 54.2 54.1 54.0 54.0 53.9 53.8 53.8 53.7 53.6
163 53.6 53.5 53.4 53.4 53.3 53.2 53.2 53.1 53.0 53.0
164 52.9 52.8 52.8 52.7 52.7 52.6 52.5 52.5 52.4 52.3
165 52.3 52.2 52.1 52.1 52.0 52.0 51.9 51.8 51.8 51.7
166 51.6 51.6 51.5 51.5 51.4 51.3 51.3 51.2 51.1 51.1
167 51.0 51.0 50.9 50.8 50.8 50.7 50.7 50.6 50.5 50.5
168 50.4 50.4 50.3 50.2 50.2 50.1 50.1 50.0 49.9 49.9
169 49.8 49.8 49.7 49.6 49.6 49.5 49.5 49.4 49.4 49.3
170 49.2 49.2 49.1 49.1 49.0 49.0 48.9 48.8 48.8 48.7
171 48.7 48.6 48.6 48.5 48.4 48.4 48.3 48.3 48.2 48.2
172 48.1 48.0 48.0 47.9 47.9 47.8 47.8 47.7 47.7 47.6
173 47.5 47.5 47.4 47.4 47.3 47.3 47.2 47.2 47.1 47.1
174 47.0 46.9 46.9 46.8 46.8 46.7 46.7 46.6 46.6 46.5
175 46.5 46.4 46.4 46.3 46.3 46.2 46.1 46.1 46.0 46.0
176 45.9 45.9 45.8 45.8 45.7 45.7 45.6 45.6 45.5 45.5
177 45.4 45.4 45.3 45.3 45.2 45.2 45.1 45.1 45.0 45.0
178 44.9 44.9 44.8 44.8 44.7 44.7 44.6 44.6 44.5 44.5
179 44.4 44.4 44.3 44.3 44.2 44.2 44.1 44.1 44.0 44.0
180 43.9 43.9 43.8 43.8 43.7 43.7 43.6 43.6 43.5 43.5
181 43.4 43.4 43.3 43.3 43.2 43.2 43.1 43.1 43.1 43.0
182 43.0 42.9 42.9 42.8 42.8 42.7 42.7 42.6 42.6 42.5
183 42.5 42.4 42.4 42.4 42.3 42.3 42.2 42.2 42.1 42.1
184 42.0 42.0 41.9 41.9 41.8 41.8 41.8 41.7 41.7 41.6
185 41.6 41.5 41.5 41.4 41.4 41.4 41.3 41.3 41.2 41.2
186 41.1 41.1 41.0 41.0 41.0 40.9 40.9 40.8 40.8 40.7
187 40.7 40.6 40.6 40.6 40.5 40.5 40.4 40.4 40.3 40.3
188 40.3 40.2 40.2 40.1 40.1 40.0 40.0 40.0 39.9 39.9
189 39.8 39.8 39.8 39.7 39.7 39.6 39.6 39.5 39.5 39.5
190 39.4 39.4 39.3 39.3 39.3 39.2 39.2 39.1 39.1 39.0
191 39.0 39.0 38.9 38.9 38.8 38.8 38.8 38.7 38.7 38.6
192 38.6 38.6 38.5 38.5 38.4 38.4 38.4 38.3 38.3 38.2
193 38.2 38.2 38.1 38.1 38.0 38.0 38.0 37.9 37.9 37.8
194 37.8 37.8 37.7 37.7 37.7 37.6 37.6 37.5 37.5 37.5
195 37.4 37.4 37.3 37.3 37.3 37.2 37.2 37.2 37.1 37.1
196 37.0 37.0 37.0 36.9 36.9 36.9 36.8 36.8 36.7 36.7
197 36.7 36.6 36.6 36.6 36.5 36.5 36.4 36.4 36.4 36.3
198 36.3 36.3 36.2 36.2 36.2 36.1 36.1 36.0 36.0 36.0
199 35.9 35.9 35.9 35.8 35.8 35.8 35.7 35.7 35.6 35.6
200 35.6 35.5 35.5 35.5 35.4 35.4 35.4 35.3 35.3 35.3
201 35.2 35.2 35.2 35.1 35.1 35.0 35.0 35.0 34.9 34.9
202 34.9 34.8 34.8 34.8 34.7 34.7 34.7 34.6 34.6 34.6
203 34.5 34.5 34.5 34.4 34.4 34.4 34.3 34.3 34.3 34.2
15

Load 200gf (0.2kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
34 2462 2448 2433 2419 2405 2391 2377 2364 2350 2337
35 2323 2310 2297 2284 2271 2258 2246 2233 2221 2208
36 2196 2184 2172 2160 2148 2136 2125 2113 2102 2090
37 2079 2068 2057 2046 2035 2024 2013 2002 1992 1981
38 1971 1961 1950 1940 1930 1920 1910 1900 1890 1881
39 1871 1862 1852 1843 1833 1824 1815 1806 1797 1788
40 1779 1770 1761 1752 1744 1735 1727 1718 1710 1701
41 1693 1685 1677 1669 1660 1652 1645 1637 1629 1621
42 1613 1606 1598 1591 1583 1576 1568 1561 1554 1546
43 1539 1532 1525 1518 1511 1504 1497 1490 1483 1477
44 1470 1463 1457 1450 1444 1437 1431 1424 1418 1412
45 1405 1399 1393 1387 1381 1375 1369 1363 1357 1351
46 1345 1339 1333 1328 1322 1316 1311 1305 1299 1294
47 1288 1283 1277 1272 1267 1261 1256 1251 1246 1240
48 1235 1230 1225 1220 1215 1210 1205 1200 1195 1190
49 1185 1181 1176 1171 1166 1162 1157 1152 1148 1143
50 1138 1134 1129 1125 1120 1116 1112 1107 1103 1098
51 1094 1090 1086 1081 1077 1073 1069 1065 1061 1057
52 1053 1048 1044 1040 1037 1033 1029 1025 1021 1017
53 1013 1009 1006 1002 998 994 991 987 983 980
54 976 972 969 965 962 958 955 951 948 944
55 941 937 934 931 927 924 921 917 914 911
56 908 904 901 898 895 892 888 885 882 879
57 876 873 870 867 864 861 858 855 852 849
58 846 843 840 837 834 832 829 826 823 820
59 818 815 812 809 807 804 801 799 796 793
60 791 788 785 783 780 778 775 772 770 767
61 765 762 760 757 755 752 750 748 745 743
62 740 738 736 733 731 729 726 724 722 719
63 717 715 713 710 708 706 704 701 699 697
64 695 693 691 688 686 684 682 680 678 676
65 674 672 669 667 665 663 661 659 657 655
66 653 651 649 647 646 644 642 640 638 636
67 634 632 630 628 626 625 623 621 619 617
68 615 614 612 610 608 607 605 603 601 600
69 598 596 594 593 591 589 588 586 584 582
70 581 579 578 576 574 573 571 569 568 566
71 565 563 561 560 558 557 555 554 552 551
72 549 547 546 544 543 541 540 538 537 536
73 534 533 531 530 528 527 525 524 523 521
74 520 518 517 516 514 513 511 510 509 507
75 506 505 503 502 501 499 498 497 495 494
76 493 491 490 489 488 486 485 484 483 481
77 480 479 478 476 475 474 473 471 470 469
78 468 467 465 464 463 462 461 459 458 457
79 456 455 454 453 451 450 449 448 447 446
16

Load 200gf (0.2kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
80 445 444 442 441 440 439 438 437 436 435
81 434 433 432 431 430 428 427 426 425 424
82 423 422 421 420 419 418 417 416 415 414
83 413 412 411 410 409 408 407 406 405 404
84 403 402 401 400 400 399 398 397 396 395
85 394 393 392 391 390 389 388 388 387 386
86 385 384 383 382 381 380 379 379 378 377
87 376 375 374 373 373 372 371 370 369 368
88 368 367 366 365 364 363 363 362 361 360
89 359 358 358 357 356 355 355 354 353 352
90 351 351 350 349 348 347 347 346 345 344
91 344 343 342 341 341 340 339 338 338 337
92 336 336 335 334 333 333 332 331 330 330
93 329 328 328 327 326 326 325 324 323 323
94 322 321 321 320 319 319 318 317 317 316
95 315 315 314 313 313 312 311 311 310 309
96 309 308 308 307 306 306 305 304 304 303
97 302 302 301 301 300 299 299 298 298 297
98 296 296 295 295 294 293 293 292 292 291
99 290 290 289 289 288 287 287 286 286 285
100 285 284 283 283 282 282 281 281 280 280
101 279 278 278 277 277 276 276 275 275 274
102 274 273 272 272 271 271 270 270 269 269
103 268 268 267 267 266 266 265 265 264 264
104 263 263 262 262 261 261 260 260 259 259
105 258 258 257 257 256 256 255 255 254 254
106 253 253 252 252 251 251 250 250 250 249
107 249 248 248 247 247 246 246 245 245 244
108 244 244 243 243 242 242 241 241 240 240
109 240 239 239 238 238 237 237 236 236 236
110 235 235 234 234 234 233 233 232 232 231
111 231 231 230 230 229 229 229 228 228 227
112 227 226 226 226 225 225 224 224 224 223
113 223 222 222 222 221 221 221 220 220 219
114 219 219 218 218 217 217 217 216 216 216
115 215 215 214 214 214 213 213 213 212 212
116 212 211 211 210 210 210 209 209 209 208
117 208 208 207 207 206 206 206 205 205 205
118 204 204 204 203 203 203 202 202 202 201
119 201 201 200 200 200 199 199 199 198 198
120 198 197 197 197 196 196 196 195 195 195
121 194 194 194 193 193 193 192 192 192 192
122 191 191 191 190 190 190 189 189 189 188
123 188 188 188 187 187 187 186 186 186 185
124 185 185 184 184 184 184 183 183 183 182
125 182 182 182 181 181 181 180 180 180 180
17

Load 200gf (0.2kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
126 179 179 179 178 178 178 178 177 177 177
127 176 176 176 176 175 175 175 175 174 174
128 174 173 173 173 173 172 172 172 172 171
129 171 171 170 170 170 170 169 169 169 169
130 168 168 168 168 167 167 167 167 166 166
131 166 166 165 165 165 165 164 164 164 164
132 163 163 163 163 162 162 162 162 161 161
133 161 161 160 160 160 160 159 159 159 159
134 158 158 158 158 158 157 157 157 157 156
135 156 156 156 155 155 155 155 155 154 154
136 154 154 153 153 153 153 153 152 152 152
137 152 151 151 151 151 151 150 150 150 150
138 149 149 149 149 149 148 148 148 148 148
139 147 147 147 147 146 146 146 146 146 145
140 145 145 145 145 144 144 144 144 144 143
141 143 143 143 143 142 142 142 142 142 141
142 141 141 141 141 140 140 140 140 140 139
143 139 139 139 139 138 138 138 138 138 137
144 137 137 137 137 136 136 136 136 136 136
145 135 135 135 135 135 134 134 134 134 134
146 134 133 133 133 133 133 132 132 132 132
147 132 132 131 131 131 131 131 130 130 130
148 130 130 130 129 129 129 129 129 129 128
149 128 128 128 128 128 127 127 127 127 127
150 126 126 126 126 126 126 125 125 125 125
151 125 125 124 124 124 124 124 124 124 123
152 123 123 123 123 123 122 122 122 122 122
153 122 121 121 121 121 121 121 120 120 120
154 120 120 120 120 119 119 119 119 119 119
155 118 118 118 118 118 118 118 117 117 117
156 117 117 117 116 116 116 116 116 116 116
157 115 115 115 115 115 115 115 114 114 114
158 114 114 114 114 113 113 113 113 113 113
159 113 112 112 112 112 112 112 112 111 111
160 111 111 111 111 111 110 110 110 110 110
161 110 110 110 109 109 109 109 109 109 109
162 108 108 108 108 108 108 108 108 107 107
163 107 107 107 107 107 106 106 106 106 106
164 106 106 106 105 105 105 105 105 105 105
165 105 104 104 104 104 104 104 104 104 103
166 103 103 103 103 103 103 103 102 102 102
167 102 102 102 102 102 101 101 101 101 101
168 101 101 101 100 100 100 100 100 99.9 99.8
169 99.6 99.5 99.4 99.3 99.2 99.1 98.9 98.8 98.7 98.6
170 98.5 98.4 98.2 98.1 98.0 97.9 97.8 97.7 97.6 97.4
171 97.3 97.2 97.1 97.0 96.9 96.8 96.6 96.5 96.4 96.3
18

Load 200gf (0.2kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
172 96.2 96.1 96.0 95.9 95.8 95.6 95.5 95.4 95.3 95.2
173 95.1 95.0 94.9 94.8 94.7 94.5 94.4 94.3 94.2 94.1
174 94.0 93.9 93.8 93.7 93.6 93.5 93.4 93.3 93.1 93.0
175 92.9 92.8 92.7 92.6 92.5 92.4 92.3 92.2 92.1 92.0
176 91.9 91.8 91.7 91.6 91.5 91.4 91.3 91.2 91.0 90.9
177 90.8 90.7 90.6 90.5 90.4 90.3 90.2 90.1 90.0 89.9
178 89.8 89.7 89.6 89.5 89.4 89.3 89.2 89.1 89.0 88.9
179 88.8 88.7 88.6 88.5 88.4 88.3 88.2 88.1 88.0 87.9
180 87.8 87.7 87.6 87.5 87.5 87.4 87.3 87.2 87.1 87.0
181 86.9 86.8 86.7 86.6 86.5 86.4 86.3 86.2 86.1 86.0
182 85.9 85.8 85.7 85.6 85.5 85.4 85.4 85.3 85.2 85.1
183 85.0 84.9 84.8 84.7 84.6 84.5 84.4 84.3 84.2 84.2
184 84.1 84.0 83.9 83.8 83.7 83.6 83.5 83.4 83.3 83.2
185 83.2 83.1 83.0 82.9 82.8 82.7 82.6 82.5 82.4 82.4
186 82.3 82.2 82.1 82.0 81.9 81.8 81.7 81.6 81.6 81.5
187 81.4 81.3 81.2 81.1 81.0 81.0 80.9 80.8 80.7 80.6
188 80.5 80.4 80.4 80.3 80.2 80.1 80.0 79.9 79.8 79.8
189 79.7 79.6 79.5 79.4 79.3 79.3 79.2 79.1 79.0 78.9
190 78.8 78.8 78.7 78.6 78.5 78.4 78.3 78.3 78.2 78.1
191 78.0 77.9 77.9 77.8 77.7 77.6 77.5 77.4 77.4 77.3
192 77.2 77.1 77.0 77.0 76.9 76.8 76.7 76.6 76.6 76.5
193 76.4 76.3 76.2 76.2 76.1 76.0 75.9 75.9 75.8 75.7
194 75.6 75.5 75.5 75.4 75.3 75.2 75.2 75.1 75.0 74.9
195 74.8 74.8 74.7 74.6 74.5 74.5 74.4 74.3 74.2 74.2
196 74.1 74.0 73.9 73.9 73.8 73.7 73.6 73.6 73.5 73.4
197 73.3 73.3 73.2 73.1 73.0 73.0 72.9 72.8 72.7 72.7
198 72.6 72.5 72.4 72.4 72.3 72.2 72.2 72.1 72.0 71.9
199 71.9 71.8 71.7 71.7 71.6 71.5 71.4 71.4 71.3 71.2
200 71.2 71.1 71.0 70.9 70.9 70.8 70.7 70.7 70.6 70.5
201 70.4 70.4 70.3 70.2 70.2 70.1 70.0 70.0 69.9 69.8
202 69.7 69.7 69.6 69.5 69.5 69.4 69.3 69.3 69.2 69.1
203 69.1 69.0 68.9 68.9 68.8 68.7 68.7 68.6 68.5 68.5
204 68.4 68.3 68.3 68.2 68.1 68.1 68.0 67.9 67.9 67.8
205 67.7 67.7 67.6 67.5 67.5 67.4 67.3 67.3 67.2 67.1
206 67.1 67.0 66.9 66.9 66.8 66.7 66.7 66.6 66.5 66.5
207 66.4 66.4 66.3 66.2 66.2 66.1 66.0 66.0 65.9 65.8
208 65.8 65.7 65.7 65.6 65.5 65.5 65.4 65.3 65.3 65.2
209 65.2 65.1 65.0 65.0 64.9 64.8 64.8 64.7 64.7 64.6
210 64.5 64.5 64.4 64.4 64.3 64.2 64.2 64.1 64.0 64.0
211 63.9 63.9 63.8 63.7 63.7 63.6 63.6 63.5 63.4 63.4
212 63.3 63.3 63.2 63.1 63.1 63.0 63.0 62.9 62.8 62.8
213 62.7 62.7 62.6 62.6 62.5 62.4 62.4 62.3 62.3 62.2
19

Load 300gf (0.3kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
42 2420 2409 2397 2386 2375 2363 2352 2341 2330 2320
43 2309 2298 2287 2277 2266 2256 2246 2235 2225 2215
44 2205 2195 2185 2175 2166 2156 2146 2137 2127 2118
45 2108 2099 2090 2080 2071 2062 2053 2044 2035 2026
46 2017 2009 2000 1991 1983 1974 1966 1957 1949 1941
47 1933 1924 1916 1908 1900 1892 1884 1876 1868 1861
48 1853 1845 1838 1830 1822 1815 1807 1800 1793 1785
49 1778 1771 1764 1756 1749 1742 1735 1728 1721 1714
50 1708 1701 1694 1687 1681 1674 1667 1661 1654 1648
51 1641 1635 1628 1622 1616 1610 1603 1597 1591 1585
52 1579 1573 1567 1561 1555 1549 1543 1537 1531 1526
53 1520 1514 1508 1503 1497 1491 1486 1480 1475 1469
54 1464 1459 1453 1448 1443 1437 1432 1427 1422 1416
55 1411 1406 1401 1396 1391 1386 1381 1376 1371 1366
56 1361 1356 1352 1347 1342 1337 1333 1328 1323 1319
57 1314 1309 1305 1300 1296 1291 1287 1282 1278 1273
58 1269 1265 1260 1256 1252 1247 1243 1239 1235 1231
59 1226 1222 1218 1214 1210 1206 1202 1198 1194 1190
60 1186 1182 1178 1174 1170 1166 1162 1159 1155 1151
61 1147 1144 1140 1136 1132 1129 1125 1121 1118 1114
62 1111 1107 1103 1100 1096 1093 1089 1086 1082 1079
63 1076 1072 1069 1065 1062 1059 1055 1052 1049 1046
64 1042 1039 1036 1033 1029 1026 1023 1020 1017 1014
65 1010 1007 1004 1001 998 995 992 989 986 983
66 980 977 974 971 968 965 962 960 957 954
67 951 948 945 943 940 937 934 931 929 926
68 923 921 918 915 912 910 907 905 902 899
69 897 894 891 889 886 884 881 879 876 874
70 871 869 866 864 861 859 856 854 852 849
71 847 844 842 840 837 835 833 830 828 826
72 823 821 819 817 814 812 810 808 805 803
73 801 799 797 795 792 790 788 786 784 782
74 780 777 775 773 771 769 767 765 763 761
75 759 757 755 753 751 749 747 745 743 741
76 739 737 735 733 731 729 728 726 724 722
77 720 718 716 714 713 711 709 707 705 703
78 702 700 698 696 695 693 691 689 688 686
79 684 682 681 679 677 675 674 672 670 669
80 667 665 664 662 660 659 657 656 654 652
81 651 649 647 646 644 643 641 640 638 636
82 635 633 632 630 629 627 626 624 623 621
83 620 618 617 615 614 612 611 609 608 606
84 605 604 602 601 599 598 596 595 594 592
85 591 589 588 587 585 584 583 581 580 579
86 577 576 575 573 572 571 569 568 567 565
87 564 563 561 560 559 558 556 555 554 553
20

Load 300gf (0.3kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
88 551 550 549 548 546 545 544 543 541 540
89 539 538 537 535 534 533 532 531 529 528
90 527 526 525 524 522 521 520 519 518 517
91 516 514 513 512 511 510 509 508 507 505
92 504 503 502 501 500 499 498 497 496 495
93 494 493 491 490 489 488 487 486 485 484
94 483 482 481 480 479 478 477 476 475 474
95 473 472 471 470 469 468 467 466 465 464
96 463 462 461 460 459 458 457 457 456 455
97 454 453 452 451 450 449 448 447 446 445
98 445 444 443 442 441 440 439 438 437 436
99 436 435 434 433 432 431 430 429 429 428
100 427 426 425 424 424 423 422 421 420 419
101 418 418 417 416 415 414 414 413 412 411
102 410 410 409 408 407 406 406 405 404 403
103 402 402 401 400 399 399 398 397 396 395
104 395 394 393 392 392 391 390 389 389 388
105 387 386 386 385 384 384 383 382 381 381
106 380 379 379 378 377 376 376 375 374 374
107 373 372 371 371 370 369 369 368 367 367
108 366 365 365 364 363 363 362 361 361 360
109 359 359 358 357 357 356 355 355 354 353
110 353 352 352 351 350 350 349 348 348 347
111 346 346 345 345 344 343 343 342 342 341
112 340 340 339 339 338 337 337 336 336 335
113 334 334 333 333 332 331 331 330 330 329
114 328 328 327 327 326 326 325 324 324 323
115 323 322 322 321 321 320 319 319 318 318
116 317 317 316 316 315 315 314 313 313 312
117 312 311 311 310 310 309 309 308 308 307
118 307 306 306 305 305 304 303 303 302 302
119 301 301 300 300 299 299 298 298 297 297
120 296 296 295 295 294 294 294 293 293 292
121 292 291 291 290 290 289 289 288 288 287
122 287 286 286 285 285 284 284 284 283 283
123 282 282 281 281 280 280 279 279 279 278
124 278 277 277 276 276 275 275 275 274 274
125 273 273 272 272 271 271 271 270 270 269
126 269 268 268 268 267 267 266 266 266 265
127 265 264 264 263 263 263 262 262 261 261
128 261 260 260 259 259 259 258 258 257 257
129 257 256 256 255 255 255 254 254 253 253
130 253 252 252 251 251 251 250 250 250 249
131 249 248 248 248 247 247 246 246 246 245
132 245 245 244 244 244 243 243 242 242 242
133 241 241 241 240 240 240 239 239 238 238
21

Load 300gf (0.3kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
134 238 237 237 237 236 236 236 235 235 235
135 234 234 234 233 233 233 232 232 231 231
136 231 230 230 230 229 229 229 228 228 228
137 227 227 227 226 226 226 225 225 225 224
138 224 224 224 223 223 223 222 222 222 221
139 221 221 220 220 220 219 219 219 218 218
140 218 217 217 217 217 216 216 216 215 215
141 215 214 214 214 214 213 213 213 212 212
142 212 211 211 211 211 210 210 210 209 209
143 209 208 208 208 208 207 207 207 206 206
144 206 206 205 205 205 204 204 204 204 203
145 203 203 202 202 202 202 201 201 201 201
146 200 200 200 199 199 199 199 198 198 198
147 198 197 197 197 196 196 196 196 195 195
148 195 195 194 194 194 194 193 193 193 193
149 192 192 192 192 191 191 191 190 190 190
150 190 189 189 189 189 188 188 188 188 187
151 187 187 187 186 186 186 186 186 185 185
152 185 185 184 184 184 184 183 183 183 183
153 182 182 182 182 181 181 181 181 180 180
154 180 180 180 179 179 179 179 178 178 178
155 178 177 177 177 177 177 176 176 176 176
156 175 175 175 175 175 174 174 174 174 173
157 173 173 173 173 172 172 172 172 171 171
158 171 171 171 170 170 170 170 170 169 169
159 169 169 168 168 168 168 168 167 167 167
160 167 167 166 166 166 166 166 165 165 165
161 165 164 164 164 164 164 163 163 163 163
162 163 162 162 162 162 162 161 161 161 161
163 161 160 160 160 160 160 159 159 159 159
164 159 159 158 158 158 158 158 157 157 157
165 157 157 156 156 156 156 156 155 155 155
166 155 155 155 154 154 154 154 154 153 153
167 153 153 153 153 152 152 152 152 152 151
168 151 151 151 151 151 150 150 150 150 150
169 149 149 149 149 149 149 148 148 148 148
170 148 148 147 147 147 147 147 147 146 146
171 146 146 146 145 145 145 145 145 145 144
172 144 144 144 144 144 143 143 143 143 143
173 143 142 142 142 142 142 142 141 141 141
174 141 141 141 141 140 140 140 140 140 140
175 139 139 139 139 139 139 138 138 138 138
176 138 138 138 137 137 137 137 137 137 136
177 136 136 136 136 136 135 135 135 135 135
178 135 135 134 134 134 134 134 134 134 133
179 133 133 133 133 133 132 132 132 132 132
22

Load 300gf (0.3kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
180 132 132 131 131 131 131 131 131 131 130
181 130 130 130 130 130 130 129 129 129 129
182 129 129 129 128 128 128 128 128 128 128
183 127 127 127 127 127 127 127 127 126 126
184 126 126 126 126 126 125 125 125 125 125
185 125 125 124 124 124 124 124 124 124 124
186 123 123 123 123 123 123 123 122 122 122
187 122 122 122 122 122 121 121 121 121 121
188 121 121 121 120 120 120 120 120 120 120
189 120 119 119 119 119 119 119 119 119 118
190 118 118 118 118 118 118 118 117 117 117
191 117 117 117 117 117 116 116 116 116 116
192 116 116 116 115 115 115 115 115 115 115
193 115 114 114 114 114 114 114 114 114 114
194 113 113 113 113 113 113 113 113 112 112
195 112 112 112 112 112 112 112 111 111 111
196 111 111 111 111 111 111 110 110 110 110
197 110 110 110 110 110 109 109 109 109 109
198 109 109 109 109 108 108 108 108 108 108
199 108 108 108 107 107 107 107 107 107 107
200 107 107 107 106 106 106 106 106 106 106
201 106 106 105 105 105 105 105 105 105 105
202 105 105 104 104 104 104 104 104 104 104
203 104 103 103 103 103 103 103 103 103 103
204 103 102 102 102 102 102 102 102 102 102
205 102 101 101 101 101 101 101 101 101 101
206 101 101 100 100 100 100 100 99.9 99.8 99.7
207 99.6 99.5 99.4 99.3 99.2 99.1 99.1 99.0 98.9 98.8
208 98.7 98.6 98.5 98.4 98.3 98.2 98.1 98.0 97.9 97.8
209 97.7 97.6 97.5 97.5 97.4 97.3 97.2 97.1 97.0 96.9
210 96.8 96.7 96.6 96.5 96.4 96.3 96.3 96.2 96.1 96.0
211 95.9 95.8 95.7 95.6 95.5 95.4 95.3 95.3 95.2 95.1
212 95.0 94.9 94.8 94.7 94.6 94.5 94.4 94.4 94.3 94.2
213 94.1 94.0 93.9 93.8 93.7 93.7 93.6 93.5 93.4 93.3
214 93.2 93.1 93.0 93.0 92.9 92.8 92.7 92.6 92.5 92.4
215 92.4 92.3 92.2 92.1 92.0 91.9 91.8 91.8 91.7 91.6
216 91.5 91.4 91.3 91.2 91.2 91.1 91.0 90.9 90.8 90.7
217 90.7 90.6 90.5 90.4 90.3 90.2 90.2 90.1 90.0 89.9
218 89.8 89.7 89.7 89.6 89.5 89.4 89.3 89.3 89.2 89.1
219 89.0 88.9 88.8 88.8 88.7 88.6 88.5 88.4 88.4 88.3
220 88.2 88.1 88.0 88.0 87.9 87.8 87.7 87.6 87.6 87.5
221 87.4 87.3 87.2 87.2 87.1 87.0 86.9 86.9 86.8 86.7
23

Load 500gf (0.5kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
54 2440 2431 2422 2413 2404 2395 2387 2378 2369 2361
55 2352 2344 2335 2327 2318 2310 2302 2293 2285 2277
56 2269 2261 2253 2245 2237 2229 2221 2213 2205 2198
57 2190 2182 2175 2167 2159 2152 2145 2137 2130 2122
58 2115 2108 2101 2093 2086 2079 2072 2065 2058 2051
59 2044 2037 2030 2023 2017 2010 2003 1996 1990 1983
60 1976 1970 1963 1957 1950 1944 1937 1931 1925 1918
61 1912 1906 1900 1893 1887 1881 1875 1869 1863 1857
62 1851 1845 1839 1833 1827 1821 1816 1810 1804 1798
63 1793 1787 1781 1776 1770 1765 1759 1753 1748 1743
64 1737 1732 1726 1721 1716 1710 1705 1700 1694 1689
65 1684 1679 1674 1669 1663 1658 1653 1648 1643 1638
66 1633 1628 1624 1619 1614 1609 1604 1599 1594 1590
67 1585 1580 1576 1571 1566 1562 1557 1552 1548 1543
68 1539 1534 1530 1525 1521 1516 1512 1508 1503 1499
69 1494 1490 1486 1482 1477 1473 1469 1465 1460 1456
70 1452 1448 1444 1440 1436 1432 1427 1423 1419 1415
71 1411 1407 1404 1400 1396 1392 1388 1384 1380 1376
72 1372 1369 1365 1361 1357 1354 1350 1346 1342 1339
73 1335 1331 1328 1324 1321 1317 1313 1310 1306 1303
74 1299 1296 1292 1289 1285 1282 1278 1275 1272 1268
75 1265 1262 1258 1255 1252 1248 1245 1242 1238 1235
76 1232 1229 1225 1222 1219 1216 1213 1209 1206 1203
77 1200 1197 1194 1191 1188 1185 1182 1179 1175 1172
78 1169 1166 1163 1161 1158 1155 1152 1149 1146 1143
79 1140 1137 1134 1131 1129 1126 1123 1120 1117 1115
80 1112 1109 1106 1103 1101 1098 1095 1093 1090 1087
81 1084 1082 1079 1076 1074 1071 1069 1066 1063 1061
82 1058 1056 1053 1050 1048 1045 1043 1040 1038 1035
83 1033 1030 1028 1025 1023 1020 1018 1016 1013 1011
84 1008 1006 1004 1001 999 996 994 992 989 987
85 985 982 980 978 976 973 971 969 966 964
86 962 960 958 955 953 951 949 947 944 942
87 940 938 936 934 931 929 927 925 923 921
88 919 917 915 913 910 908 906 904 902 900
89 898 896 894 892 890 888 886 884 882 880
90 878 876 875 873 871 869 867 865 863 861
91 859 857 855 854 852 850 848 846 844 842
92 841 839 837 835 833 832 830 828 826 824
93 823 821 819 817 816 814 812 810 809 807
94 805 804 802 800 798 797 795 793 792 790
95 788 787 785 783 782 780 779 777 775 774
96 772 770 769 767 766 764 762 761 759 758
97 756 755 753 752 750 748 747 745 744 742
98 741 739 738 736 735 733 732 730 729 727
99 726 724 723 722 720 719 717 716 714 713
24

Load 500gf (0.5kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
100 712 710 709 707 706 704 703 702 700 699
101 697 696 695 693 692 691 689 688 687 685
102 684 683 681 680 679 677 676 675 673 672
103 671 669 668 667 665 664 663 662 660 659
104 658 657 655 654 653 652 650 649 648 647
105 645 644 643 642 640 639 638 637 636 634
106 633 632 631 630 628 627 626 625 624 623
107 621 620 619 618 617 616 615 613 612 611
108 610 609 608 607 606 604 603 602 601 600
109 599 598 597 596 594 593 592 591 590 589
110 588 587 586 585 584 583 582 581 580 579
111 577 576 575 574 573 572 571 570 569 568
112 567 566 565 564 563 562 561 560 559 558
113 557 556 555 554 553 552 551 550 549 548
114 547 547 546 545 544 543 542 541 540 539
115 538 537 536 535 534 533 532 532 531 530
116 529 528 527 526 525 524 523 522 522 521
117 520 519 518 517 516 515 514 514 513 512
118 511 510 509 508 508 507 506 505 504 503
119 502 502 501 500 499 498 497 497 496 495
120 494 493 492 492 491 490 489 488 488 487
121 486 485 484 484 483 482 481 480 480 479
122 478 477 476 476 475 474 473 473 472 471
123 470 470 469 468 467 466 466 465 464 463
124 463 462 461 461 460 459 458 458 457 456
125 455 455 454 453 452 452 451 450 450 449
126 448 447 447 446 445 445 444 443 443 442
127 441 440 440 439 438 438 437 436 436 435
128 434 434 433 432 432 431 430 430 429 428
129 428 427 426 426 425 424 424 423 422 422
130 421 420 420 419 418 418 417 417 416 415
131 415 414 413 413 412 411 411 410 410 409
132 408 408 407 406 406 405 405 404 403 403
133 402 402 401 400 400 399 399 398 397 397
134 396 396 395 394 394 393 393 392 392 391
135 390 390 389 389 388 388 387 386 386 385
136 385 384 384 383 382 382 381 381 380 380
137 379 379 378 377 377 376 376 375 375 374
138 374 373 373 372 371 371 370 370 369 369
139 368 368 367 367 366 366 365 365 364 364
140 363 362 362 361 361 360 360 359 359 358
141 358 357 357 356 356 355 355 354 354 353
142 353 352 352 351 351 350 350 349 349 348
143 348 347 347 346 346 346 345 345 344 344
144 343 343 342 342 341 341 340 340 339 339
145 338 338 337 337 337 336 336 335 335 334
25

Load 500gf (0.5kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
146 334 333 333 332 332 332 331 331 330 330
147 329 329 328 328 327 327 327 326 326 325
148 325 324 324 324 323 323 322 322 321 321
149 320 320 320 319 319 318 318 317 317 317
150 316 316 315 315 315 314 314 313 313 312
151 312 312 311 311 310 310 310 309 309 308
152 308 308 307 307 306 306 306 305 305 304
153 304 304 303 303 302 302 302 301 301 300
154 300 300 299 299 298 298 298 297 297 297
155 296 296 295 295 295 294 294 293 293 293
156 292 292 292 291 291 291 290 290 289 289
157 289 288 288 288 287 287 286 286 286 285
158 285 285 284 284 284 283 283 283 282 282
159 281 281 281 280 280 280 279 279 279 278
160 278 278 277 277 277 276 276 276 275 275
161 274 274 274 273 273 273 272 272 272 271
162 271 271 270 270 270 269 269 269 268 268
163 268 267 267 267 266 266 266 266 265 265
164 265 264 264 264 263 263 263 262 262 262
165 261 261 261 260 260 260 259 259 259 259
166 258 258 258 257 257 257 256 256 256 255
167 255 255 255 254 254 254 253 253 253 252
168 252 252 251 251 251 251 250 250 250 249
169 249 249 249 248 248 248 247 247 247 246
170 246 246 246 245 245 245 244 244 244 244
171 243 243 243 242 242 242 242 241 241 241
172 241 240 240 240 239 239 239 239 238 238
173 238 237 237 237 237 236 236 236 236 235
174 235 235 234 234 234 234 233 233 233 233
175 232 232 232 232 231 231 231 230 230 230
176 230 229 229 229 229 228 228 228 228 227
177 227 227 227 226 226 226 226 225 225 225
178 225 224 224 224 224 223 223 223 223 222
179 222 222 222 221 221 221 221 220 220 220
180 220 219 219 219 219 218 218 218 218 217
181 217 217 217 216 216 216 216 216 215 215
182 215 215 214 214 214 214 213 213 213 213
183 212 212 212 212 212 211 211 211 211 210
184 210 210 210 209 209 209 209 209 208 208
185 208 208 207 207 207 207 207 206 206 206
186 206 205 205 205 205 205 204 204 204 204
187 203 203 203 203 203 202 202 202 202 202
188 201 201 201 201 200 200 200 200 200 199
189 199 199 199 199 198 198 198 198 198 197
190 197 197 197 196 196 196 196 196 195 195
26

Load 500gf (0.5kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
191 195 195 195 194 194 194 194 194 193 193
192 193 193 193 192 192 192 192 192 191 191
193 191 191 191 190 190 190 190 190 189 189
194 189 189 189 188 188 188 188 188 187 187
195 187 187 187 187 186 186 186 186 186 185
196 185 185 185 185 184 184 184 184 184 184
197 183 183 183 183 183 182 182 182 182 182
198 181 181 181 181 181 181 180 180 180 180
199 180 179 179 179 179 179 179 178 178 178
200 178 178 178 177 177 177 177 177 176 176
201 176 176 176 176 175 175 175 175 175 175
202 174 174 174 174 174 174 173 173 173 173
203 173 172 172 172 172 172 172 171 171 171
204 171 171 171 170 170 170 170 170 170 169
205 169 169 169 169 169 168 168 168 168 168
206 168 168 167 167 167 167 167 167 166 166
207 166 166 166 166 165 165 165 165 165 165
208 164 164 164 164 164 164 164 163 163 163
209 163 163 163 162 162 162 162 162 162 161
210 161 161 161 161 161 161 160 160 160 160
211 160 160 160 159 159 159 159 159 159 158
212 158 158 158 158 158 158 157 157 157 157
213 157 157 157 156 156 156 156 156 156 156
214 155 155 155 155 155 155 154 154 154 154
215 154 154 154 153 153 153 153 153 153 153
216 152 152 152 152 152 152 152 152 151 151
217 151 151 151 151 151 150 150 150 150 150
218 150 150 149 149 149 149 149 149 149 148
219 148 148 148 148 148 148 148 147 147 147
220 147 147 147 147 146 146 146 146 146 146
221 146 146 145 145 145 145 145 145 145 144
222 144 144 144 144 144 144 144 143 143 143
223 143 143 143 143 143 142 142 142 142 142
224 142 142 142 141 141 141 141 141 141 141
225 141 140 140 140 140 140 140 140 140 139
226 139 139 139 139 139 139 139 138 138 138
227 138 138 138 138 138 137 137 137 137 137
228 137 137 137 137 136 136 136 136 136 136
229 136 136 135 135 135 135 135 135 135 135
230 134 134 134 134 134 134 134 134 134 133
231 133 133 133 133 133 133 133 133 132 132
232 132 132 132 132 132 132 132 131 131 131
233 131 131 131 131 131 130 130 130 130 130
234 130 130 130 130 129 129 129 129 129 129
235 129 129 129 129 128 128 128 128 128 128
27

Load 500gf (0.5kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
236 128 128 128 127 127 127 127 127 127 127
237 127 127 126 126 126 126 126 126 126 126
238 126 126 125 125 125 125 125 125 125 125
239 125 124 124 124 124 124 124 124 124 124
240 124 123 123 123 123 123 123 123 123 123
241 123 122 122 122 122 122 122 122 122 122
242 121 121 121 121 121 121 121 121 121 121
243 120 120 120 120 120 120 120 120 120 120
244 120 119 119 119 119 119 119 119 119 119
245 119 118 118 118 118 118 118 118 118 118
246 118 117 117 117 117 117 117 117 117 117
247 117 117 116 116 116 116 116 116 116 116
248 116 116 115 115 115 115 115 115 115 115
249 115 115 115 114 114 114 114 114 114 114
250 114 114 114 114 113 113 113 113 113 113
251 113 113 113 113 113 112 112 112 112 112
252 112 112 112 112 112 112 112 111 111 111
253 111 111 111 111 111 111 111 111 110 110
254 110 110 110 110 110 110 110 110 110 110
255 109 109 109 109 109 109 109 109 109 109
256 109 108 108 108 108 108 108 108 108 108
257 108 108 108 107 107 107 107 107 107 107
258 107 107 107 107 107 106 106 106 106 106
259 106 106 106 106 106 106 106 105 105 105
260 105 105 105 105 105 105 105 105 105 105
261 104 104 104 104 104 104 104 104 104 104
262 104 104 103 103 103 103 103 103 103 103
263 103 103 103 103 103 102 102 102 102 102
264 102 102 102 102 102 102 102 102 101 101
265 101 101 101 101 101 101 101 101 101 101
266 101 100 100 100 100 100 100 100 100 99.9
267 99.8 99.7 99.7 99.6 99.5 99.4 99.4 99.3 99.2 99.1
268 99.1 99.0 98.9 98.8 98.8 98.7 98.6 98.5 98.5 98.4
269 98.3 98.3 98.2 98.1 98.0 98.0 97.9 97.8 97.7 97.7
270 97.6 97.5 97.5 97.4 97.3 97.2 97.2 97.1 97.0 97.0
271 96.9 96.8 96.7 96.7 96.6 96.5 96.5 96.4 96.3 96.2
272 96.2 96.1 96.0 96.0 95.9 95.8 95.7 95.7 95.6 95.5
273 95.5 95.4 95.3 95.3 95.2 95.1 95.0 95.0 94.9 94.8
274 94.8 94.7 94.6 94.6 94.5 94.4 94.4 94.3 94.2 94.2
275 94.1 94.0 93.9 93.9 93.8 93.7 93.7 93.6 93.5 93.5
276 93.4 93.3 93.3 93.2 93.1 93.1 93.0 92.9 92.9 92.8
277 92.7 92.7 92.6 92.5 92.5 92.4 92.3 92.3 92.2 92.1
278 92.1 92.0 91.9 91.9 91.8 91.7 91.7 91.6 91.5 91.5
28

Load 1000gf (1kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
76 2464 2457 2451 2444 2438 2432 2425 2419 2413 2406
77 2400 2394 2388 2381 2375 2369 2363 2357 2351 2345
78 2339 2333 2327 2321 2315 2309 2303 2297 2292 2286
79 2280 2274 2269 2263 2257 2251 2246 2240 2235 2229
80 2223 2218 2212 2207 2201 2196 2190 2185 2180 2174
81 2169 2164 2158 2153 2148 2142 2137 2132 2127 2121
82 2116 2111 2106 2101 2096 2091 2086 2081 2076 2071
83 2066 2061 2056 2051 2046 2041 2036 2031 2026 2022
84 2017 2012 2007 2002 1998 1993 1988 1984 1979 1974
85 1970 1965 1960 1956 1951 1947 1942 1938 1933 1928
86 1924 1920 1915 1911 1906 1902 1897 1893 1889 1884
87 1880 1876 1871 1867 1863 1859 1854 1850 1846 1842
88 1838 1833 1829 1825 1821 1817 1813 1809 1805 1801
89 1796 1792 1788 1784 1780 1776 1773 1769 1765 1761
90 1757 1753 1749 1745 1741 1737 1734 1730 1726 1722
91 1718 1715 1711 1707 1703 1700 1696 1692 1689 1685
92 1681 1678 1674 1670 1667 1663 1660 1656 1652 1649
93 1645 1642 1638 1635 1631 1628 1624 1621 1617 1614
94 1610 1607 1604 1600 1597 1593 1590 1587 1583 1580
95 1577 1573 1570 1567 1564 1560 1557 1554 1551 1547
96 1544 1541 1538 1534 1531 1528 1525 1522 1519 1516
97 1512 1509 1506 1503 1500 1497 1494 1491 1488 1485
98 1482 1479 1476 1473 1470 1467 1464 1461 1458 1455
99 1452 1449 1446 1443 1440 1437 1434 1432 1429 1426
100 1423 1420 1417 1415 1412 1409 1406 1403 1401 1398
101 1395 1392 1389 1387 1384 1381 1379 1376 1373 1370
102 1368 1365 1362 1360 1357 1354 1352 1349 1347 1344
103 1341 1339 1336 1334 1331 1328 1326 1323 1321 1318
104 1316 1313 1311 1308 1306 1303 1301 1298 1296 1293
105 1291 1288 1286 1283 1281 1278 1276 1274 1271 1269
106 1266 1264 1262 1259 1257 1255 1252 1250 1248 1245
107 1243 1241 1238 1236 1234 1231 1229 1227 1225 1222
108 1220 1218 1215 1213 1211 1209 1207 1204 1202 1200
109 1198 1196 1193 1191 1189 1187 1185 1182 1180 1178
110 1176 1174 1172 1170 1168 1165 1163 1161 1159 1157
111 1155 1153 1151 1149 1147 1145 1143 1141 1138 1136
112 1134 1132 1130 1128 1126 1124 1122 1120 1118 1116
113 1114 1112 1110 1109 1107 1105 1103 1101 1099 1097
114 1095 1093 1091 1089 1087 1085 1084 1082 1080 1078
115 1076 1074 1072 1070 1069 1067 1065 1063 1061 1059
116 1058 1056 1054 1052 1050 1048 1047 1045 1043 1041
117 1040 1038 1036 1034 1032 1031 1029 1027 1025 1024
118 1022 1020 1019 1017 1015 1013 1012 1010 1008 1007
119 1005 1003 1002 1000 998 996 995 993 991 990
120 988 987 985 983 982 980 978 977 975 974
29

Load 1000gf (1kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
121 972 970 969 967 966 964 962 961 959 958
122 956 954 953 951 950 948 947 945 944 942
123 941 939 938 936 934 933 931 930 928 927
124 925 924 922 921 920 918 917 915 914 912
125 911 909 908 906 905 903 902 901 899 898
126 896 895 893 892 891 889 888 886 885 884
127 882 881 879 878 877 875 874 873 871 870
128 869 867 866 864 863 862 860 859 858 856
129 855 854 852 851 850 849 847 846 845 843
130 842 841 839 838 837 836 834 833 832 830
131 829 828 827 825 824 823 822 820 819 818
132 817 815 814 813 812 811 809 808 807 806
133 804 803 802 801 800 798 797 796 795 794
134 792 791 790 789 788 787 785 784 783 782
135 781 780 778 777 776 775 774 773 772 770
136 769 768 767 766 765 764 763 761 760 759
137 758 757 756 755 754 753 752 750 749 748
138 747 746 745 744 743 742 741 740 739 738
139 737 735 734 733 732 731 730 729 728 727
140 726 725 724 723 722 721 720 719 718 717
141 716 715 714 713 712 711 710 709 708 707
142 706 705 704 703 702 701 700 699 698 697
143 696 695 694 693 692 691 690 689 688 687
144 686 685 684 683 682 682 681 680 679 678
145 677 676 675 674 673 672 671 670 669 668
146 668 667 666 665 664 663 662 661 660 659
147 659 658 657 656 655 654 653 652 651 651
148 650 649 648 647 646 645 644 644 643 642
149 641 640 639 638 638 637 636 635 634 633
150 632 632 631 630 629 628 627 627 626 625
151 624 623 622 622 621 620 619 618 618 617
152 616 615 614 613 613 612 611 610 609 609
153 608 607 606 606 605 604 603 602 602 601
154 600 599 598 598 597 596 595 595 594 593
155 592 592 591 590 589 588 588 587 586 585
156 585 584 583 582 582 581 580 580 579 578
157 577 577 576 575 574 574 573 572 571 571
158 570 569 569 568 567 566 566 565 564 564
159 563 562 561 561 560 559 559 558 557 557
160 556 555 554 554 553 552 552 551 550 550
161 549 548 548 547 546 546 545 544 544 543
162 542 542 541 540 540 539 538 538 537 536
163 536 535 534 534 533 532 532 531 530 530
164 529 528 528 527 527 526 525 525 524 523
165 523 522 521 521 520 520 519 518 518 517
30

Load 1000gf (1kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
166 516 516 515 515 514 513 513 512 511 511
167 510 510 509 508 508 507 507 506 505 505
168 504 504 503 502 502 501 501 500 499 499
169 498 498 497 496 496 495 495 494 494 493
170 492 492 491 491 490 490 489 488 488 487
171 487 486 486 485 484 484 483 483 482 482
172 481 480 480 479 479 478 478 477 477 476
173 475 475 474 474 473 473 472 472 471 471
174 470 469 469 468 468 467 467 466 466 465
175 465 464 464 463 463 462 461 461 460 460
176 459 459 458 458 457 457 456 456 455 455
177 454 454 453 453 452 452 451 451 450 450
178 449 449 448 448 447 447 446 446 445 445
179 444 444 443 443 442 442 441 441 440 440
180 439 439 438 438 437 437 436 436 435 435
181 434 434 433 433 432 432 431 431 431 430
182 430 429 429 428 428 427 427 426 426 425
183 425 424 424 424 423 423 422 422 421 421
184 420 420 419 419 418 418 418 417 417 416
185 416 415 415 414 414 414 413 413 412 412
186 411 411 410 410 410 409 409 408 408 407
187 407 406 406 406 405 405 404 404 403 403
188 403 402 402 401 401 400 400 400 399 399
189 398 398 398 397 397 396 396 395 395 395
190 394 394 393 393 393 392 392 391 391 390
191 390 390 389 389 388 388 388 387 387 386
192 386 386 385 385 384 384 384 383 383 382
193 382 382 381 381 380 380 380 379 379 378
194 378 378 377 377 377 376 376 375 375 375
195 374 374 373 373 373 372 372 372 371 371
196 370 370 370 369 369 369 368 368 367 367
197 367 366 366 366 365 365 364 364 364 363
198 363 363 362 362 362 361 361 360 360 360
199 359 359 359 358 358 358 357 357 356 356
200 356 355 355 355 354 354 354 353 353 353
201 352 352 352 351 351 350 350 350 349 349
202 349 348 348 348 347 347 347 346 346 346
203 345 345 345 344 344 344 343 343 343 342
204 342 342 341 341 341 340 340 340 339 339
205 339 338 338 338 337 337 337 336 336 336
206 335 335 335 334 334 334 333 333 333 332
207 332 332 331 331 331 330 330 330 330 329
208 329 329 328 328 328 327 327 327 326 326
209 326 325 325 325 325 324 324 324 323 323
210 323 322 322 322 321 321 321 321 320 320
31

Load 1000gf (1kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
211 320 319 319 319 318 318 318 318 317 317
212 317 316 316 316 315 315 315 315 314 314
213 314 313 313 313 312 312 312 312 311 311
214 311 310 310 310 310 309 309 309 308 308
215 308 308 307 307 307 306 306 306 306 305
216 305 305 304 304 304 304 303 303 303 302
217 302 302 302 301 301 301 301 300 300 300
218 299 299 299 299 298 298 298 298 297 297
219 297 296 296 296 296 295 295 295 295 294
220 294 294 293 293 293 293 292 292 292 292
221 291 291 291 291 290 290 290 290 289 289
222 289 288 288 288 288 287 287 287 287 286
223 286 286 286 285 285 285 285 284 284 284
224 284 283 283 283 283 282 282 282 282 281
225 281 281 281 280 280 280 280 279 279 279
226 279 278 278 278 278 277 277 277 277 276
227 276 276 276 275 275 275 275 274 274 274
228 274 273 273 273 273 273 272 272 272 272
229 271 271 271 271 270 270 270 270 269 269
230 269 269 269 268 268 268 268 267 267 267
231 267 266 266 266 266 266 265 265 265 265
232 264 264 264 264 263 263 263 263 263 262
233 262 262 262 261 261 261 261 261 260 260
234 260 260 259 259 259 259 259 258 258 258
235 258 257 257 257 257 257 256 256 256 256
236 255 255 255 255 255 254 254 254 254 254
237 253 253 253 253 252 252 252 252 252 251
238 251 251 251 251 250 250 250 250 250 249
239 249 249 249 248 248 248 248 248 247 247
240 247 247 247 246 246 246 246 246 245 245
241 245 245 245 244 244 244 244 244 243 243
242 243 243 243 242 242 242 242 242 241 241
243 241 241 241 240 240 240 240 240 239 239
244 239 239 239 238 238 238 238 238 237 237
245 237 237 237 236 236 236 236 236 236 235
246 235 235 235 235 234 234 234 234 234 233
247 233 233 233 233 232 232 232 232 232 232
248 231 231 231 231 231 230 230 230 230 230
249 230 229 229 229 229 229 228 228 228 228
250 228 227 227 227 227 227 227 226 226 226
251 226 226 226 225 225 225 225 225 224 224
252 224 224 224 224 223 223 223 223 223 222
253 222 222 222 222 222 221 221 221 221 221
254 221 220 220 220 220 220 220 219 219 219
255 219 219 218 218 218 218 218 218 217 217
32

Load 1000gf (1kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
256 217 217 217 217 216 216 216 216 216 216
257 215 215 215 215 215 215 214 214 214 214
258 214 214 213 213 213 213 213 213 212 212
259 212 212 212 212 211 211 211 211 211 211
260 211 210 210 210 210 210 210 209 209 209
261 209 209 209 208 208 208 208 208 208 207
262 207 207 207 207 207 207 206 206 206 206
263 206 206 205 205 205 205 205 205 204 204
264 204 204 204 204 204 203 203 203 203 203
265 203 202 202 202 202 202 202 202 201 201
266 201 201 201 201 201 200 200 200 200 200
267 200 199 199 199 199 199 199 199 198 198
268 198 198 198 198 198 197 197 197 197 197
269 197 197 196 196 196 196 196 196 195 195
270 195 195 195 195 195 194 194 194 194 194
271 194 194 193 193 193 193 193 193 193 192
272 192 192 192 192 192 192 191 191 191 191
273 191 191 191 191 190 190 190 190 190 190
274 190 189 189 189 189 189 189 189 188 188
275 188 188 188 188 188 187 187 187 187 187
276 187 187 187 186 186 186 186 186 186 186
277 185 185 185 185 185 185 185 185 184 184
278 184 184 184 184 184 183 183 183 183 183
279 183 183 183 182 182 182 182 182 182 182
280 182 181 181 181 181 181 181 181 180 180
281 180 180 180 180 180 180 179 179 179 179
282 179 179 179 179 178 178 178 178 178 178
283 178 178 177 177 177 177 177 177 177 177
284 176 176 176 176 176 176 176 176 175 175
285 175 175 175 175 175 175 174 174 174 174
286 174 174 174 174 173 173 173 173 173 173
287 173 173 173 172 172 172 172 172 172 172
288 172 171 171 171 171 171 171 171 171 170
289 170 170 170 170 170 170 170 170 169 169
290 169 169 169 169 169 169 169 168 168 168
291 168 168 168 168 168 167 167 167 167 167
292 167 167 167 167 166 166 166 166 166 166
293 166 166 166 165 165 165 165 165 165 165
294 165 165 164 164 164 164 164 164 164 164
295 164 163 163 163 163 163 163 163 163 163
296 162 162 162 162 162 162 162 162 162 161
297 161 161 161 161 161 161 161 161 160 160
298 160 160 160 160 160 160 160 159 159 159
299 159 159 159 159 159 159 159 158 158 158
300 158 158 158 158 158 158 157 157 157 157
33

Load 1000gf (1kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
301 157 157 157 157 157 157 156 156 156 156
302 156 156 156 156 156 156 155 155 155 155
303 155 155 155 155 155 154 154 154 154 154
304 154 154 154 154 154 153 153 153 153 153
305 153 153 153 153 153 152 152 152 152 152
306 152 152 152 152 152 151 151 151 151 151
307 151 151 151 151 151 150 150 150 150 150
308 150 150 150 150 150 150 149 149 149 149
309 149 149 149 149 149 149 148 148 148 148
310 148 148 148 148 148 148 148 147 147 147
311 147 147 147 147 147 147 147 146 146 146
312 146 146 146 146 146 146 146 146 145 145
313 145 145 145 145 145 145 145 145 145 144
314 144 144 144 144 144 144 144 144 144 144
315 143 143 143 143 143 143 143 143 143 143
316 143 142 142 142 142 142 142 142 142 142
317 142 142 141 141 141 141 141 141 141 141
318 141 141 141 140 140 140 140 140 140 140
319 140 140 140 140 139 139 139 139 139 139
320 139 139 139 139 139 139 138 138 138 138
321 138 138 138 138 138 138 138 138 137 137
322 137 137 137 137 137 137 137 137 137 136
323 136 136 136 136 136 136 136 136 136 136
324 136 135 135 135 135 135 135 135 135 135
325 135 135 135 134 134 134 134 134 134 134
326 134 134 134 134 134 133 133 133 133 133
327 133 133 133 133 133 133 133 133 132 132
328 132 132 132 132 132 132 132 132 132 132
329 131 131 131 131 131 131 131 131 131 131
330 131 131 131 130 130 130 130 130 130 130
331 130 130 130 130 130 129 129 129 129 129
332 129 129 129 129 129 129 129 129 128 128
333 128 128 128 128 128 128 128 128 128 128
334 128 127 127 127 127 127 127 127 127 127
335 127 127 127 127 126 126 126 126 126 126
336 126 126 126 126 126 126 126 126 125 125
337 125 125 125 125 125 125 125 125 125 125
338 125 124 124 124 124 124 124 124 124 124
339 124 124 124 124 124 123 123 123 123 123
340 123 123 123 123 123 123 123 123 123 122
341 122 122 122 122 122 122 122 122 122 122
342 122 122 122 121 121 121 121 121 121 121
343 121 121 121 121 121 121 121 120 120 120
344 120 120 120 120 120 120 120 120 120 120
345 120 119 119 119 119 119 119 119 119 119
34

Load 1000gf (1kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
346 119 119 119 119 119 119 118 118 118 118
347 118 118 118 118 118 118 118 118 118 118
348 118 117 117 117 117 117 117 117 117 117
349 117 117 117 117 117 116 116 116 116 116
350 116 116 116 116 116 116 116 116 116 116
351 116 115 115 115 115 115 115 115 115 115
352 115 115 115 115 115 115 114 114 114 114
353 114 114 114 114 114 114 114 114 114 114
354 114 113 113 113 113 113 113 113 113 113
355 113 113 113 113 113 113 113 112 112 112
356 112 112 112 112 112 112 112 112 112 112
357 112 112 112 111 111 111 111 111 111 111
358 111 111 111 111 111 111 111 111 111 110
359 110 110 110 110 110 110 110 110 110 110
360 110 110 110 110 110 109 109 109 109 109
361 109 109 109 109 109 109 109 109 109 109
362 109 109 108 108 108 108 108 108 108 108
363 108 108 108 108 108 108 108 108 108 107
364 107 107 107 107 107 107 107 107 107 107
365 107 107 107 107 107 107 106 106 106 106
366 106 106 106 106 106 106 106 106 106 106
367 106 106 106 105 105 105 105 105 105 105
368 105 105 105 105 105 105 105 105 105 105
369 105 104 104 104 104 104 104 104 104 104
370 104 104 104 104 104 104 104 104 103 103
371 103 103 103 103 103 103 103 103 103 103
372 103 103 103 103 103 103 102 102 102 102
373 102 102 102 102 102 102 102 102 102 102
374 102 102 102 102 102 101 101 101 101 101
375 101 101 101 101 101 101 101 101 101 101
376 101 101 101 100 100 100 100 100 100 100
377 100 100 100 100 99.9 99.9 99.8 99.7 99.7 99.6
378 99.6 99.5 99.5 99.4 99.4 99.3 99.3 99.2 99.2 99.1
379 99.1 99.0 99.0 98.9 98.9 98.8 98.8 98.7 98.6 98.6
380 98.5 98.5 98.4 98.4 98.3 98.3 98.2 98.2 98.1 98.1
381 98.0 98.0 97.9 97.9 97.8 97.8 97.7 97.7 97.6 97.6
382 97.5 97.5 97.4 97.4 97.3 97.3 97.2 97.2 97.1 97.1
383 97.0 97.0 96.9 96.9 96.8 96.8 96.7 96.7 96.6 96.6
384 96.5 96.5 96.4 96.4 96.3 96.3 96.2 96.2 96.1 96.1
385 96.0 96.0 95.9 95.9 95.8 95.8 95.7 95.7 95.6 95.6
386 95.5 95.5 95.4 95.4 95.3 95.3 95.2 95.2 95.1 95.1
387 95.0 95.0 94.9 94.9 94.8 94.8 94.7 94.7 94.6 94.6
388 94.5 94.5 94.4 94.4 94.3 94.3 94.2 94.2 94.1 94.1
389 94.0 94.0 93.9 93.9 93.8 93.8 93.7 93.7 93.7 93.6
390 93.6 93.5 93.5 93.4 93.4 93.3 93.3 93.2 93.2 93.1
35

Load 2000gf (2kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
107 2486 2481 2477 2472 2467 2463 2458 2454 2449 2445
108 2440 2435 2431 2426 2422 2418 2413 2409 2404 2400
109 2395 2391 2387 2382 2378 2374 2369 2365 2361 2356
110 2352 2348 2344 2339 2335 2331 2327 2322 2318 2314
111 2310 2306 2302 2297 2293 2289 2285 2281 2277 2273
112 2269 2265 2261 2257 2253 2249 2245 2241 2237 2233
113 2229 2225 2221 2217 2213 2209 2205 2201 2198 2194
114 2190 2186 2182 2178 2175 2171 2167 2163 2159 2156
115 2152 2148 2145 2141 2137 2133 2130 2126 2122 2119
116 2115 2111 2108 2104 2101 2097 2093 2090 2086 2083
117 2079 2075 2072 2068 2065 2061 2058 2054 2051 2047
118 2044 2040 2037 2034 2030 2027 2023 2020 2017 2013
119 2010 2006 2003 2000 1996 1993 1990 1986 1983 1980
120 1976 1973 1970 1967 1963 1960 1957 1954 1950 1947
121 1944 1941 1937 1934 1931 1928 1925 1922 1918 1915
122 1912 1909 1906 1903 1900 1897 1893 1890 1887 1884
123 1881 1878 1875 1872 1869 1866 1863 1860 1857 1854
124 1851 1848 1845 1842 1839 1836 1833 1830 1827 1824
125 1821 1819 1816 1813 1810 1807 1804 1801 1798 1795
126 1793 1790 1787 1784 1781 1778 1776 1773 1770 1767
127 1765 1762 1759 1756 1753 1751 1748 1745 1743 1740
128 1737 1734 1732 1729 1726 1724 1721 1718 1716 1713
129 1710 1708 1705 1702 1700 1697 1694 1692 1689 1687
130 1684 1681 1679 1676 1674 1671 1669 1666 1663 1661
131 1658 1656 1653 1651 1648 1646 1643 1641 1638 1636
132 1633 1631 1628 1626 1624 1621 1619 1616 1614 1611
133 1609 1606 1604 1602 1599 1597 1594 1592 1590 1587
134 1585 1583 1580 1578 1576 1573 1571 1569 1566 1564
135 1562 1559 1557 1555 1552 1550 1548 1546 1543 1541
136 1539 1536 1534 1532 1530 1527 1525 1523 1521 1519
137 1516 1514 1512 1510 1508 1505 1503 1501 1499 1497
138 1494 1492 1490 1488 1486 1484 1482 1479 1477 1475
139 1473 1471 1469 1467 1465 1462 1460 1458 1456 1454
140 1452 1450 1448 1446 1444 1442 1440 1438 1436 1434
141 1432 1429 1427 1425 1423 1421 1419 1417 1415 1413
142 1411 1409 1407 1405 1404 1402 1400 1398 1396 1394
143 1392 1390 1388 1386 1384 1382 1380 1378 1376 1374
144 1372 1371 1369 1367 1365 1363 1361 1359 1357 1355
145 1354 1352 1350 1348 1346 1344 1342 1341 1339 1337
146 1335 1333 1331 1330 1328 1326 1324 1322 1321 1319
147 1317 1315 1313 1312 1310 1308 1306 1305 1303 1301
148 1299 1298 1296 1294 1292 1291 1289 1287 1285 1284
149 1282 1280 1278 1277 1275 1273 1272 1270 1268 1267
150 1265 1263 1262 1260 1258 1256 1255 1253 1252 1250
151 1248 1247 1245 1243 1242 1240 1238 1237 1235 1233
36

Load 2000gf (2kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
152 1232 1230 1229 1227 1225 1224 1222 1221 1219 1217
153 1216 1214 1213 1211 1209 1208 1206 1205 1203 1202
154 1200 1198 1197 1195 1194 1192 1191 1189 1188 1186
155 1185 1183 1182 1180 1179 1177 1175 1174 1172 1171
156 1169 1168 1166 1165 1163 1162 1161 1159 1158 1156
157 1155 1153 1152 1150 1149 1147 1146 1144 1143 1141
158 1140 1139 1137 1136 1134 1133 1131 1130 1129 1127
159 1126 1124 1123 1122 1120 1119 1117 1116 1115 1113
160 1112 1110 1109 1108 1106 1105 1103 1102 1101 1099
161 1098 1097 1095 1094 1093 1091 1090 1088 1087 1086
162 1084 1083 1082 1080 1079 1078 1076 1075 1074 1072
163 1071 1070 1069 1067 1066 1065 1063 1062 1061 1059
164 1058 1057 1056 1054 1053 1052 1050 1049 1048 1047
165 1045 1044 1043 1042 1040 1039 1038 1037 1035 1034
166 1033 1032 1030 1029 1028 1027 1025 1024 1023 1022
167 1020 1019 1018 1017 1016 1014 1013 1012 1011 1010
168 1008 1007 1006 1005 1004 1002 1001 1000 999 998
169 996 995 994 993 992 991 989 988 987 986
170 985 984 982 981 980 979 978 977 976 974
171 973 972 971 970 969 968 966 965 964 963
172 962 961 960 959 958 956 955 954 953 952
173 951 950 949 948 947 945 944 943 942 941
174 940 939 938 937 936 935 934 933 931 930
175 929 928 927 926 925 924 923 922 921 920
176 919 918 917 916 915 914 913 912 910 909
177 908 907 906 905 904 903 902 901 900 899
178 898 897 896 895 894 893 892 891 890 889
179 888 887 886 885 884 883 882 881 880 879
180 878 877 876 875 875 874 873 872 871 870
181 869 868 867 866 865 864 863 862 861 860
182 859 858 857 856 855 854 854 853 852 851
183 850 849 848 847 846 845 844 843 842 842
184 841 840 839 838 837 836 835 834 833 832
185 832 831 830 829 828 827 826 825 824 824
186 823 822 821 820 819 818 817 816 816 815
187 814 813 812 811 810 810 809 808 807 806
188 805 804 804 803 802 801 800 799 798 798
189 797 796 795 794 793 793 792 791 790 789
190 788 788 787 786 785 784 783 783 782 781
191 780 779 779 778 777 776 775 774 774 773
192 772 771 770 770 769 768 767 766 766 765
193 764 763 762 762 761 760 759 759 758 757
194 756 755 755 754 753 752 752 751 750 749
195 748 748 747 746 745 745 744 743 742 742
196 741 740 739 739 738 737 736 736 735 734
37

Load 2000gf (2kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
197 733 733 732 731 730 730 729 728 727 727
198 726 725 724 724 723 722 722 721 720 719
199 719 718 717 717 716 715 714 714 713 712
200 712 711 710 709 709 708 707 707 706 705
201 704 704 703 702 702 701 700 700 699 698
202 697 697 696 695 695 694 693 693 692 691
203 691 690 689 689 688 687 687 686 685 685
204 684 683 683 682 681 681 680 679 679 678
205 677 677 676 675 675 674 673 673 672 671
206 671 670 669 669 668 667 667 666 665 665
207 664 664 663 662 662 661 660 660 659 658
208 658 657 657 656 655 655 654 653 653 652
209 652 651 650 650 649 648 648 647 647 646
210 645 645 644 644 643 642 642 641 640 640
211 639 639 638 637 637 636 636 635 634 634
212 633 633 632 631 631 630 630 629 628 628
213 627 627 626 626 625 624 624 623 623 622
214 621 621 620 620 619 619 618 617 617 616
215 616 615 615 614 613 613 612 612 611 611
216 610 609 609 608 608 607 607 606 606 605
217 604 604 603 603 602 602 601 601 600 599
218 599 598 598 597 597 596 596 595 594 594
219 593 593 592 592 591 591 590 590 589 589
220 588 587 587 586 586 585 585 584 584 583
221 583 582 582 581 581 580 580 579 579 578
222 577 577 576 576 575 575 574 574 573 573
223 572 572 571 571 570 570 569 569 568 568
224 567 567 566 566 565 565 564 564 563 563
225 562 562 561 561 560 560 559 559 558 558
226 557 557 556 556 555 555 554 554 553 553
227 552 552 551 551 550 550 549 549 548 548
228 547 547 547 546 546 545 545 544 544 543
229 543 542 542 541 541 540 540 539 539 538
230 538 538 537 537 536 536 535 535 534 534
231 533 533 532 532 532 531 531 530 530 529
232 529 528 528 527 527 526 526 526 525 525
233 524 524 523 523 522 522 522 521 521 520
234 520 519 519 518 518 518 517 517 516 516
235 515 515 514 514 514 513 513 512 512 511
236 511 511 510 510 509 509 508 508 508 507
237 507 506 506 505 505 505 504 504 503 503
238 502 502 502 501 501 500 500 499 499 499
239 498 498 497 497 497 496 496 495 495 495
240 494 494 493 493 492 492 492 491 491 490
241 490 490 489 489 488 488 488 487 487 486
38

Load 2000gf (2kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
242 486 486 485 485 484 484 484 483 483 482
243 482 482 481 481 480 480 480 479 479 478
244 478 478 477 477 476 476 476 475 475 475
245 474 474 473 473 473 472 472 471 471 471
246 470 470 470 469 469 468 468 468 467 467
247 466 466 466 465 465 465 464 464 463 463
248 463 462 462 462 461 461 461 460 460 459
249 459 459 458 458 458 457 457 456 456 456
250 455 455 455 454 454 454 453 453 452 452
251 452 451 451 451 450 450 450 449 449 449
252 448 448 447 447 447 446 446 446 445 445
253 445 444 444 444 443 443 443 442 442 441
254 441 441 440 440 440 439 439 439 438 438
255 438 437 437 437 436 436 436 435 435 435
256 434 434 434 433 433 433 432 432 432 431
257 431 431 430 430 430 429 429 429 428 428
258 428 427 427 427 426 426 426 425 425 425
259 424 424 424 423 423 423 422 422 422 421
260 421 421 420 420 420 419 419 419 418 418
261 418 417 417 417 417 416 416 416 415 415
262 415 414 414 414 413 413 413 412 412 412
263 411 411 411 411 410 410 410 409 409 409
264 408 408 408 407 407 407 406 406 406 406
265 405 405 405 404 404 404 403 403 403 403
266 402 402 402 401 401 401 400 400 400 400
267 399 399 399 398 398 398 397 397 397 397
268 396 396 396 395 395 395 394 394 394 394
269 393 393 393 392 392 392 392 391 391 391
270 390 390 390 390 389 389 389 388 388 388
271 388 387 387 387 386 386 386 386 385 385
272 385 384 384 384 384 383 383 383 382 382
273 382 382 381 381 381 380 380 380 380 379
274 379 379 379 378 378 378 377 377 377 377
275 376 376 376 376 375 375 375 374 374 374
276 374 373 373 373 373 372 372 372 371 371
277 371 371 370 370 370 370 369 369 369 369
278 368 368 368 367 367 367 367 366 366 366
279 366 365 365 365 365 364 364 364 364 363
280 363 363 362 362 362 362 361 361 361 361
281 360 360 360 360 359 359 359 359 358 358
282 358 358 357 357 357 357 356 356 356 356
283 355 355 355 355 354 354 354 354 353 353
284 353 353 352 352 352 352 351 351 351 351
285 350 350 350 350 349 349 349 349 348 348
286 348 348 347 347 347 347 346 346 346 346
39

Load 2000gf (2kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
287 346 345 345 345 345 344 344 344 344 343
288 343 343 343 342 342 342 342 341 341 341
289 341 341 340 340 340 340 339 339 339 339
290 338 338 338 338 337 337 337 337 337 336
291 336 336 336 335 335 335 335 334 334 334
292 334 334 333 333 333 333 332 332 332 332
293 332 331 331 331 331 330 330 330 330 329
294 329 329 329 329 328 328 328 328 327 327
295 327 327 327 326 326 326 326 325 325 325
296 325 325 324 324 324 324 324 323 323 323
297 323 322 322 322 322 322 321 321 321 321
298 320 320 320 320 320 319 319 319 319 319
299 318 318 318 318 317 317 317 317 317 316
300 316 316 316 316 315 315 315 315 315 314
301 314 314 314 313 313 313 313 313 312 312
302 312 312 312 311 311 311 311 311 310 310
303 310 310 310 309 309 309 309 309 308 308
304 308 308 308 307 307 307 307 307 306 306
305 306 306 306 305 305 305 305 305 304 304
306 304 304 304 303 303 303 303 303 302 302
307 302 302 302 301 301 301 301 301 300 300
308 300 300 300 299 299 299 299 299 298 298
309 298 298 298 297 297 297 297 297 297 296
310 296 296 296 296 295 295 295 295 295 294
311 294 294 294 294 293 293 293 293 293 293
312 292 292 292 292 292 291 291 291 291 291
313 291 290 290 290 290 290 289 289 289 289
314 289 288 288 288 288 288 288 287 287 287
315 287 287 286 286 286 286 286 286 285 285
316 285 285 285 284 284 284 284 284 284 283
317 283 283 283 283 283 282 282 282 282 282
318 281 281 281 281 281 281 280 280 280 280
319 280 279 279 279 279 279 279 278 278 278
320 278 278 278 277 277 277 277 277 277 276
321 276 276 276 276 276 275 275 275 275 275
322 274 274 274 274 274 274 273 273 273 273
323 273 273 272 272 272 272 272 272 271 271
324 271 271 271 271 270 270 270 270 270 270
325 269 269 269 269 269 269 268 268 268 268
326 268 268 267 267 267 267 267 267 266 266
327 266 266 266 266 266 265 265 265 265 265
328 265 264 264 264 264 264 264 263 263 263
329 263 263 263 262 262 262 262 262 262 261
330 261 261 261 261 261 261 260 260 260 260
331 260 260 259 259 259 259 259 259 259 258
40

Load 2000gf (2kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
332 258 258 258 258 258 257 257 257 257 257
333 257 256 256 256 256 256 256 256 255 255
334 255 255 255 255 255 254 254 254 254 254
335 254 253 253 253 253 253 253 253 252 252
336 252 252 252 252 251 251 251 251 251 251
337 251 250 250 250 250 250 250 250 249 249
338 249 249 249 249 249 248 248 248 248 248
339 248 248 247 247 247 247 247 247 246 246
340 246 246 246 246 246 245 245 245 245 245
341 245 245 244 244 244 244 244 244 244 243
342 243 243 243 243 243 243 242 242 242 242
343 242 242 242 241 241 241 241 241 241 241
344 241 240 240 240 240 240 240 240 239 239
345 239 239 239 239 239 238 238 238 238 238
346 238 238 237 237 237 237 237 237 237 236
347 236 236 236 236 236 236 236 235 235 235
348 235 235 235 235 234 234 234 234 234 234
349 234 234 233 233 233 233 233 233 233 232
350 232 232 232 232 232 232 232 231 231 231
351 231 231 231 231 230 230 230 230 230 230
352 230 230 229 229 229 229 229 229 229 229
353 228 228 228 228 228 228 228 227 227 227
354 227 227 227 227 227 226 226 226 226 226
355 226 226 226 225 225 225 225 225 225 225
356 225 224 224 224 224 224 224 224 224 223
357 223 223 223 223 223 223 223 222 222 222
358 222 222 222 222 222 221 221 221 221 221
359 221 221 221 220 220 220 220 220 220 220
360 220 219 219 219 219 219 219 219 219 219
361 218 218 218 218 218 218 218 218 217 217
362 217 217 217 217 217 217 216 216 216 216
363 216 216 216 216 216 215 215 215 215 215
364 215 215 215 214 214 214 214 214 214 214
365 214 214 213 213 213 213 213 213 213 213
366 212 212 212 212 212 212 212 212 212 211
367 211 211 211 211 211 211 211 210 210 210
368 210 210 210 210 210 210 209 209 209 209
369 209 209 209 209 209 208 208 208 208 208
370 208 208 208 208 207 207 207 207 207 207
371 207 207 207 206 206 206 206 206 206 206
372 206 206 205 205 205 205 205 205 205 205
373 205 204 204 204 204 204 204 204 204 204
374 203 203 203 203 203 203 203 203 203 202
375 202 202 202 202 202 202 202 202 202 201
376 201 201 201 201 201 201 201 201 200 200
41

Load 2000gf (2kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
377 200 200 200 200 200 200 200 199 199 199
378 199 199 199 199 199 199 199 198 198 198
379 198 198 198 198 198 198 198 197 197 197
380 197 197 197 197 197 197 196 196 196 196
381 196 196 196 196 196 196 195 195 195 195
382 195 195 195 195 195 195 194 194 194 194
383 194 194 194 194 194 194 193 193 193 193
384 193 193 193 193 193 193 192 192 192 192
385 192 192 192 192 192 192 191 191 191 191
386 191 191 191 191 191 191 190 190 190 190
387 190 190 190 190 190 190 189 189 189 189
388 189 189 189 189 189 189 188 188 188 188
389 188 188 188 188 188 188 187 187 187 187
390 187 187 187 187 187 187 187 186 186 186
391 186 186 186 186 186 186 186 185 185 185
392 185 185 185 185 185 185 185 185 184 184
393 184 184 184 184 184 184 184 184 184 183
394 183 183 183 183 183 183 183 183 183 182
395 182 182 182 182 182 182 182 182 182 182
396 181 181 181 181 181 181 181 181 181 181
397 181 180 180 180 180 180 180 180 180 180
398 180 180 179 179 179 179 179 179 179 179
399 179 179 179 178 178 178 178 178 178 178
400 178 178 178 178 178 177 177 177 177 177
401 177 177 177 177 177 177 176 176 176 176
402 176 176 176 176 176 176 176 175 175 175
403 175 175 175 175 175 175 175 175 175 174
404 174 174 174 174 174 174 174 174 174 174
405 174 173 173 173 173 173 173 173 173 173
406 173 173 172 172 172 172 172 172 172 172
407 172 172 172 172 171 171 171 171 171 171
408 171 171 171 171 171 171 170 170 170 170
409 170 170 170 170 170 170 170 170 169 169
410 169 169 169 169 169 169 169 169 169 169
411 168 168 168 168 168 168 168 168 168 168
412 168 168 168 167 167 167 167 167 167 167
413 167 167 167 167 167 166 166 166 166 166
414 166 166 166 166 166 166 166 165 165 165
415 165 165 165 165 165 165 165 165 165 165
416 164 164 164 164 164 164 164 164 164 164
417 164 164 164 163 163 163 163 163 163 163
418 163 163 163 163 163 162 162 162 162 162
419 162 162 162 162 162 162 162 162 161 161
420 161 161 161 161 161 161 161 161 161 161
421 161 160 160 160 160 160 160 160 160 160
42

Load 2000gf (2kgf)
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
422 160 160 160 160 160 159 159 159 159 159
423 159 159 159 159 159 159 159 159 158 158
424 158 158 158 158 158 158 158 158 158 158
425 158 157 157 157 157 157 157 157 157 157
426 157 157 157 157 157 156 156 156 156 156
427 156 156 156 156 156 156 156 156 156 155
428 155 155 155 155 155 155 155 155 155 155
429 155 155 154 154 154 154 154 154 154 154
430 154 154 154 154 154 154 153 153 153 153
431 153 153 153 153 153 153 153 153 153 153
432 152 152 152 152 152 152 152 152 152 152
433 152 152 152 152 152 151 151 151 151 151
434 151 151 151 151 151 151 151 151 151 150
435 150 150 150 150 150 150 150 150 150 150
436 150 150 150 150 149 149 149 149 149 149
437 149 149 149 149 149 149 149 149 148 148
438 148 148 148 148 148 148 148 148 148 148
439 148 148 148 147 147 147 147 147 147 147
440 147 147 147 147 147 147 147 147 146 146
441 146 146 146 146 146 146 146 146 146 146
442 146 146 146 145 145 145 145 145 145 145
443 145 145 145 145 145 145 145 145 144 144
444 144 144 144 144 144 144 144 144 144 144
445 144 144 144 144 143 143 143 143 143 143
446 143 143 143 143 143 143 143 143 143 142
447 142 142 142 142 142 142 142 142 142 142
448 142 142 142 142 142 141 141 141 141 141
449 141 141 141 141 141 141 141 141 141 141
450 141 140 140 140 140 140 140 140 140 140
451 140 140 140 140 140 140 140 139 139 139
452 139 139 139 139 139 139 139 139 139 139
453 139 139 139 139 138 138 138 138 138 138
454 138 138 138 138 138 138 138 138 138 138
455 137 137 137 137 137 137 137 137 137 137
456 137 137 137 137 137 137 137 136 136 136
457 136 136 136 136 136 136 136 136 136 136
458 136 136 136 135 135 135 135 135 135 135
459 135 135 135 135 135 135 135 135 135 135
460 134 134 134 134 134 134 134 134 134 134
461 134 134 134 134 134 134 134 134 133 133
462 133 133 133 133 133 133 133 133 133 133
463 133 133 133 133 133 132 132 132 132 132
464 132 132 132 132 132 132 132 132 132 132
465 132 132 132 131 131 131 131 131 131 131
466 131 131 131 131 131 131 131 131 131 131
43

Load 5kgf
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
150 3162 3120 3080 3039 3000 2961 2924 2887 2850 2814
160 2779 2745 2711 2678 2645 2613 2582 2551 2521 2491
170 2462 2433 2405 2377 2350 2323 2297 2271 2246 2221
180 2196 2172 2148 2125 2102 2079 2057 2035 2013 1992
190 1971 1950 1930 1910 1890 1871 1852 1833 1815 1797
200 1779 1761 1744 1727 1710 1693 1677 1660 1645 1629
210 1613 1598 1583 1568 1554 1539 1525 1511 1497 1483
220 1470 1457 1444 1431 1418 1405 1393 1381 1369 1357
230 1345 1333 1322 1311 1299 1288 1277 1267 1256 1246
240 1235 1225 1215 1205 1195 1185 1176 1166 1157 1148
250 1138 1129 1120 1112 1103 1094 1086 1077 1069 1061
260 1053 1044 1037 1029 1021 1013 1006 998 991 983
270 976 969 962 955 948 941 934 927 921 914
280 908 901 895 888 882 876 870 864 858 852
290 846 840 834 829 823 818 812 807 801 796
300 791 785 780 775 770 765 760 755 750 745
310 740 736 731 726 722 717 713 708 704 699
320 695 691 686 682 678 674 669 665 661 657
330 653 649 646 642 638 634 630 626 623 619
340 615 612 608 605 601 598 594 591 588 584
350 581 578 574 571 568 565 561 558 555 552
360 549 546 543 540 537 534 531 528 525 523
370 520 517 514 511 509 506 503 501 498 495
380 493 490 488 485 483 480 478 475 473 470
390 468 465 463 461 458 456 454 451 449 447
400 445 442 440 438 436 434 432 430 427 425
410 423 421 419 417 415 413 411 409 407 405
420 403 401 400 398 396 394 392 390 388 387
430 385 383 381 379 378 376 374 373 371 369
440 368 366 364 363 361 359 358 356 355 353
450 351 350 348 347 345 344 342 341 339 338
460 336 335 333 332 330 329 328 326 325 323
470 322 321 319 318 317 315 314 313 311 310
480 309 308 306 305 304 302 301 300 299 298
490 296 295 294 293 292 290 289 288 287 286
500 285 283 282 281 280 279 278 277 276 275
510 274 272 271 270 269 268 267 266 265 264
520 263 262 261 260 259 258 257 256 255 254
530 253 252 251 250 250 249 248 247 246 245
540 244 243 242 241 240 240 239 238 237 236
550 235 234 234 233 232 231 230 229 229 228
560 227 226 225 224 224 223 222 221 221 220
570 219 218 217 217 216 215 214 214 213 212
580 212 211 210 209 209 208 207 206 206 205
590 204 204 203 202 202 201 200 200 199 198
44

Load 5kgf
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
600 198 197 196 196 195 194 194 193 192 192
610 191 191 190 189 189 188 188 187 186 186
620 185 184 184 183 183 182 182 181 180 180
630 179 179 178 178 177 176 176 175 175 174
640 174 173 173 172 172 171 170 170 169 169
650 168 168 167 167 166 166 165 165 164 164
660 163 163 162 162 161 161 160 160 159 159
670 158 158 158 157 157 156 156 155 155 154
680 154 153 153 153 152 152 151 151 150 150
690 149 149 149 148 148 147 147 146 146 146
700 145 145 144 144 144 143 143 142 142 142
710 141 141 140 140 140 139 139 138 138 138
720 137 137 136 136 136 135 135 135 134 134
730 134 133 133 132 132 132 131 131 131 130
740 130 130 129 129 129 128 128 128 127 127
750 126 126 126 125 125 125 124 124 124 124
760 123 123 123 122 122 122 121 121 121 120
770 120 120 119 119 119 118 118 118 118 117
780 117 117 116 116 116 115 115 115 115 114
790 114 114 113 113 113 113 112 112 112 111
800 111 111 111 110 110 110 110 109 109 109
810 108 108 108 108 107 107 107 107 106 106
820 106 106 105 105 105 105 104 104 104 104
830 103 103 103 103 102 102 102 102 101 101
840 101 101 100 100 99.9 99.6 99.4 99.2 98.9 98.7
850 98.5 98.2 98.0 97.8 97.6 97.3 97.1 96.9 96.6 96.4
860 96.2 96.0 95.8 95.5 95.3 95.1 94.9 94.7 94.4 94.2
870 94.0 93.8 93.6 93.4 93.1 92.9 92.7 92.5 92.3 92.1
880 91.9 91.7 91.5 91.3 91.0 90.8 90.6 90.4 90.2 90.0
890 89.8 89.6 89.4 89.2 89.0 88.8 88.6 88.4 88.2 88.0
900 87.8 87.6 87.5 87.3 87.1 86.9 86.7 86.5 86.3 86.1
910 85.9 85.7 85.5 85.4 85.2 85.0 84.8 84.6 84.4 84.2
920 84.1 83.9 83.7 83.5 83.3 83.2 83.0 82.8 82.6 82.4
930 82.3 82.1 81.9 81.7 81.6 81.4 81.2 81.0 80.9 80.7
940 80.5 80.4 80.2 80.0 79.8 79.7 79.5 79.3 79.2 79.0
950 78.8 78.7 78.5 78.3 78.2 78.0 77.9 77.7 77.5 77.4
960 77.2 77.0 76.9 76.7 76.6 76.4 76.2 76.1 75.9 75.8
970 75.6 75.5 75.3 75.2 75.0 74.8 74.7 74.5 74.4 74.2
980 74.1 73.9 73.8 73.6 73.5 73.3 73.2 73.0 72.9 72.7
990 72.6 72.4 72.3 72.2 72.0 71.9 71.7 71.6 71.4 71.3
45

Load 10kgf
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
210 3227 3196 3166 3137 3107 3078 3050 3022 2994 2967
220 2940 2914 2887 2862 2836 2811 2786 2762 2737 2714
230 2690 2667 2644 2621 2599 2577 2555 2533 2512 2491
240 2470 2450 2430 2410 2390 2371 2351 2332 2314 2295
250 2277 2259 2241 2223 2206 2188 2171 2154 2138 2121
260 2105 2089 2073 2057 2042 2026 2011 1996 1981 1967
270 1952 1938 1923 1909 1895 1882 1868 1855 1841 1828
280 1815 1802 1789 1777 1764 1752 1740 1728 1716 1704
290 1692 1680 1669 1658 1646 1635 1624 1613 1602 1592
300 1581 1571 1560 1550 1540 1530 1520 1510 1500 1490
310 1481 1471 1462 1453 1443 1434 1425 1416 1407 1398
320 1390 1381 1372 1364 1356 1347 1339 1331 1323 1315
330 1307 1299 1291 1283 1276 1268 1260 1253 1246 1238
340 1231 1224 1217 1210 1203 1196 1189 1182 1175 1168
350 1162 1155 1148 1142 1136 1129 1123 1117 1110 1104
360 1098 1092 1086 1080 1074 1068 1062 1057 1051 1045
370 1039 1034 1028 1023 1017 1012 1007 1001 996 991
380 985 980 975 970 965 960 955 950 945 940
390 936 931 926 921 917 912 907 903 898 894
400 889 885 881 876 872 868 863 859 855 851
410 847 842 838 834 830 826 822 818 814 811
420 807 803 799 795 792 788 784 780 777 773
430 770 766 762 759 755 752 749 745 742 738
440 735 732 728 725 722 719 715 712 709 706
450 703 700 697 693 690 687 684 681 678 675
460 672 670 667 664 661 658 655 652 650 647
470 644 641 639 636 633 631 628 625 623 620
480 618 615 613 610 607 605 602 600 598 595
490 593 590 588 585 583 581 578 576 574 571
500 569 567 565 562 560 558 556 554 551 549
510 547 545 543 541 539 537 534 532 530 528
520 526 524 522 520 518 516 514 512 510 509
530 507 505 503 501 499 497 495 493 492 490
540 488 486 484 483 481 479 477 476 474 472
550 470 469 467 465 464 462 460 459 457 455
560 454 452 451 449 447 446 444 443 441 440
570 438 436 435 433 432 430 429 427 426 424
580 423 422 420 419 417 416 414 413 412 410
590 409 407 406 405 403 402 401 399 398 397
600 395 394 393 391 390 389 387 386 385 384
610 382 381 380 379 377 376 375 374 373 371
620 370 369 368 367 365 364 363 362 361 360
630 359 357 356 355 354 353 352 351 350 349
640 347 346 345 344 343 342 341 340 339 338
650 337 336 335 334 333 332 331 330 329 328
46

Load 10kgf
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
660 327 326 325 324 323 322 321 320 319 318
670 317 316 315 314 313 312 311 310 310 309
680 308 307 306 305 304 303 302 302 301 300
690 299 298 297 296 295 295 294 293 292 291
700 290 290 289 288 287 286 285 285 284 283
710 282 281 281 280 279 278 278 277 276 275
720 274 274 273 272 271 271 270 269 268 268
730 267 266 266 265 264 263 263 262 261 261
740 260 259 258 258 257 256 256 255 254 254
750 253 252 252 251 250 250 249 248 248 247
760 246 246 245 244 244 243 243 242 241 241
770 240 239 239 238 238 237 236 236 235 234
780 234 233 233 232 232 231 230 230 229 229
790 228 227 227 226 226 225 225 224 223 223
800 222 222 221 221 220 220 219 219 218 217
810 217 216 216 215 215 214 214 213 213 212
820 212 211 211 210 210 209 209 208 208 207
830 207 206 206 205 205 204 204 203 203 202
840 202 201 201 200 200 199 199 198 198 197
850 197 196 196 196 195 195 194 194 193 193
860 192 192 192 191 191 190 190 189 189 188
870 188 188 187 187 186 186 185 185 185 184
880 184 183 183 183 182 182 181 181 180 180
890 180 179 179 178 178 178 177 177 176 176
900 176 175 175 175 174 174 173 173 173 172
910 172 171 171 171 170 170 170 169 169 168
920 168 168 167 167 167 166 166 166 165 165
930 165 164 164 163 163 163 162 162 162 161
940 161 161 160 160 160 159 159 159 158 158
950 158 157 157 157 156 156 156 155 155 155
960 154 154 154 153 153 153 152 152 152 152
970 151 151 151 150 150 150 149 149 149 148
980 148 148 148 147 147 147 146 146 146 145
990 145 145 145 144 144 144 143 143 143 143
47

Load 20kgf
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
290 3384 3361 3338 3315 3293 3270 3248 3226 3205 3183
300 3162 3141 3120 3100 3080 3059 3039 3020 3000 2981
310 2961 2942 2924 2905 2887 2868 2850 2832 2814 2797
320 2779 2762 2745 2728 2711 2694 2678 2662 2645 2629
330 2613 2598 2582 2567 2551 2536 2521 2506 2491 2476
340 2462 2448 2433 2419 2405 2391 2377 2364 2350 2337
350 2323 2310 2297 2284 2271 2258 2246 2233 2221 2208
360 2196 2184 2172 2160 2148 2136 2125 2113 2102 2090
370 2079 2068 2057 2046 2035 2024 2013 2002 1992 1981
380 1971 1961 1950 1940 1930 1920 1910 1900 1890 1881
390 1871 1862 1852 1843 1833 1824 1815 1806 1797 1788
400 1779 1770 1761 1752 1744 1735 1727 1718 1710 1701
410 1693 1685 1677 1669 1660 1652 1645 1637 1629 1621
420 1613 1606 1598 1591 1583 1576 1568 1561 1554 1546
430 1539 1532 1525 1518 1511 1504 1497 1490 1483 1477
440 1470 1463 1457 1450 1444 1437 1431 1424 1418 1412
450 1405 1399 1393 1387 1381 1375 1369 1363 1357 1351
460 1345 1339 1333 1328 1322 1316 1311 1305 1299 1294
470 1288 1283 1277 1272 1267 1261 1256 1251 1246 1240
480 1235 1230 1225 1220 1215 1210 1205 1200 1195 1190
490 1185 1181 1176 1171 1166 1162 1157 1152 1148 1143
500 1138 1134 1129 1125 1120 1116 1112 1107 1103 1098
510 1094 1090 1086 1081 1077 1073 1069 1065 1061 1057
520 1053 1048 1044 1040 1037 1033 1029 1025 1021 1017
530 1013 1009 1006 1002 998 994 991 987 983 980
540 976 972 969 965 962 958 955 951 948 944
550 941 937 934 931 927 924 921 917 914 911
560 908 904 901 898 895 892 888 885 882 879
570 876 873 870 867 864 861 858 855 852 849
580 846 843 840 837 834 832 829 826 823 820
590 818 815 812 809 807 804 801 799 796 793
600 791 788 785 783 780 778 775 772 770 767
610 765 762 760 757 755 752 750 748 745 743
620 740 738 736 733 731 729 726 724 722 719
630 717 715 713 710 708 706 704 701 699 697
640 695 693 691 688 686 684 682 680 678 676
650 674 672 669 667 665 663 661 659 657 655
660 653 651 649 647 646 644 642 640 638 636
670 634 632 630 628 626 625 623 621 619 617
680 615 614 612 610 608 607 605 603 601 600
690 598 596 594 593 591 589 588 586 584 582
700 581 579 578 576 574 573 571 569 568 566
710 565 563 561 560 558 557 555 554 552 551
720 549 547 546 544 543 541 540 538 537 536
730 534 533 531 530 528 527 525 524 523 521
48

Load 20kgf
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
740 520 518 517 516 514 513 511 510 509 507
750 506 505 503 502 501 499 498 497 495 494
760 493 491 490 489 488 486 485 484 483 481
770 480 479 478 476 475 474 473 471 470 469
780 468 467 465 464 463 462 461 459 458 457
790 456 455 454 453 451 450 449 448 447 446
800 445 444 442 441 440 439 438 437 436 435
810 434 433 432 431 430 428 427 426 425 424
820 423 422 421 420 419 418 417 416 415 414
830 413 412 411 410 409 408 407 406 405 404
840 403 402 401 400 400 399 398 397 396 395
850 394 393 392 391 390 389 388 388 387 386
860 385 384 383 382 381 380 379 379 378 377
870 376 375 374 373 373 372 371 370 369 368
880 368 367 366 365 364 363 363 362 361 360
890 359 358 358 357 356 355 355 354 353 352
900 351 351 350 349 348 347 347 346 345 344
910 344 343 342 341 341 340 339 338 338 337
920 336 336 335 334 333 333 332 331 330 330
930 329 328 328 327 326 326 325 324 323 323
940 322 321 321 320 319 319 318 317 317 316
950 315 315 314 313 313 312 311 311 310 309
960 309 308 308 307 306 306 305 304 304 303
970 302 302 301 301 300 299 299 298 298 297
980 296 296 295 295 294 293 293 292 292 291
990 290 290 289 289 288 287 287 286 286 285
49

Load 30kgf
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
360 3294 3276 3258 3240 3222 3204 3187 3170 3152 3135
370 3118 3102 3085 3068 3052 3036 3020 3004 2988 2972
380 2956 2941 2925 2910 2895 2880 2865 2850 2836 2821
390 2807 2792 2778 2764 2750 2736 2722 2709 2695 2682
400 2668 2655 2642 2629 2616 2603 2590 2577 2565 2552
410 2540 2527 2515 2503 2491 2479 2467 2455 2443 2432
420 2420 2409 2397 2386 2375 2363 2352 2341 2330 2320
430 2309 2298 2287 2277 2266 2256 2246 2235 2225 2215
440 2205 2195 2185 2175 2166 2156 2146 2137 2127 2118
450 2108 2099 2090 2080 2071 2062 2053 2044 2035 2026
460 2017 2009 2000 1991 1983 1974 1966 1957 1949 1941
470 1933 1924 1916 1908 1900 1892 1884 1876 1868 1861
480 1853 1845 1838 1830 1822 1815 1807 1800 1793 1785
490 1778 1771 1764 1756 1749 1742 1735 1728 1721 1714
500 1708 1701 1694 1687 1681 1674 1667 1661 1654 1648
510 1641 1635 1628 1622 1616 1610 1603 1597 1591 1585
520 1579 1573 1567 1561 1555 1549 1543 1537 1531 1526
530 1520 1514 1508 1503 1497 1491 1486 1480 1475 1469
540 1464 1459 1453 1448 1443 1437 1432 1427 1422 1416
550 1411 1406 1401 1396 1391 1386 1381 1376 1371 1366
560 1361 1356 1352 1347 1342 1337 1333 1328 1323 1319
570 1314 1309 1305 1300 1296 1291 1287 1282 1278 1273
580 1269 1265 1260 1256 1252 1247 1243 1239 1235 1231
590 1226 1222 1218 1214 1210 1206 1202 1198 1194 1190
600 1186 1182 1178 1174 1170 1166 1162 1159 1155 1151
610 1147 1144 1140 1136 1132 1129 1125 1121 1118 1114
620 1111 1107 1103 1100 1096 1093 1089 1086 1082 1079
630 1076 1072 1069 1065 1062 1059 1055 1052 1049 1046
640 1042 1039 1036 1033 1029 1026 1023 1020 1017 1014
650 1010 1007 1004 1001 998 995 992 989 986 983
660 980 977 974 971 968 965 962 960 957 954
670 951 948 945 943 940 937 934 931 929 926
680 923 921 918 915 912 910 907 905 902 899
690 897 894 891 889 886 884 881 879 876 874
700 871 869 866 864 861 859 856 854 852 849
710 847 844 842 840 837 835 833 830 828 826
720 823 821 819 817 814 812 810 808 805 803
730 801 799 797 795 792 790 788 786 784 782
740 780 777 775 773 771 769 767 765 763 761
750 759 757 755 753 751 749 747 745 743 741
760 739 737 735 733 731 729 728 726 724 722
770 720 718 716 714 713 711 709 707 705 703
780 702 700 698 696 695 693 691 689 688 686
790 684 682 681 679 677 675 674 672 670 669
800 667 665 664 662 660 659 657 656 654 652
50

Load 30kgf
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
810 651 649 647 646 644 643 641 640 638 636
820 635 633 632 630 629 627 626 624 623 621
830 620 618 617 615 614 612 611 609 608 606
840 605 604 602 601 599 598 596 595 594 592
850 591 589 588 587 585 584 583 581 580 579
860 577 576 575 573 572 571 569 568 567 565
870 564 563 561 560 559 558 556 555 554 553
880 551 550 549 548 546 545 544 543 541 540
890 539 538 537 535 534 533 532 531 529 528
900 527 526 525 524 522 521 520 519 518 517
910 516 514 513 512 511 510 509 508 507 505
920 504 503 502 501 500 499 498 497 496 495
930 494 493 491 490 489 488 487 486 485 484
940 483 482 481 480 479 478 477 476 475 474
950 473 472 471 470 469 468 467 466 465 464
960 463 462 461 460 459 458 457 457 456 455
970 454 453 452 451 450 449 448 447 446 445
980 445 444 443 442 441 440 439 438 437 436
990 436 435 434 433 432 431 430 429 429 428
51

Load 50kgf
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
460 3362 3348 3333 3319 3305 3291 3276 3262 3249 3235
470 3221 3207 3194 3180 3167 3153 3140 3127 3114 3101
480 3088 3075 3063 3050 3037 3025 3012 3000 2988 2975
490 2963 2951 2939 2927 2916 2904 2892 2880 2869 2857
500 2846 2835 2823 2812 2801 2790 2779 2768 2757 2746
510 2735 2725 2714 2704 2693 2683 2672 2662 2652 2641
520 2631 2621 2611 2601 2591 2581 2572 2562 2552 2543
530 2533 2523 2514 2504 2495 2486 2477 2467 2458 2449
540 2440 2431 2422 2413 2404 2395 2387 2378 2369 2361
550 2352 2344 2335 2327 2318 2310 2302 2293 2285 2277
560 2269 2261 2253 2245 2237 2229 2221 2213 2205 2198
570 2190 2182 2175 2167 2159 2152 2145 2137 2130 2122
580 2115 2108 2101 2093 2086 2079 2072 2065 2058 2051
590 2044 2037 2030 2023 2017 2010 2003 1996 1990 1983
600 1976 1970 1963 1957 1950 1944 1937 1931 1925 1918
610 1912 1906 1900 1893 1887 1881 1875 1869 1863 1857
620 1851 1845 1839 1833 1827 1821 1816 1810 1804 1798
630 1793 1787 1781 1776 1770 1765 1759 1753 1748 1743
640 1737 1732 1726 1721 1716 1710 1705 1700 1694 1689
650 1684 1679 1674 1669 1663 1658 1653 1648 1643 1638
660 1633 1628 1624 1619 1614 1609 1604 1599 1594 1590
670 1585 1580 1576 1571 1566 1562 1557 1552 1548 1543
680 1539 1534 1530 1525 1521 1516 1512 1508 1503 1499
690 1494 1490 1486 1482 1477 1473 1469 1465 1460 1456
700 1452 1448 1444 1440 1436 1432 1427 1423 1419 1415
710 1411 1407 1404 1400 1396 1392 1388 1384 1380 1376
720 1372 1369 1365 1361 1357 1354 1350 1346 1342 1339
730 1335 1331 1328 1324 1321 1317 1313 1310 1306 1303
740 1299 1296 1292 1289 1285 1282 1278 1275 1272 1268
750 1265 1262 1258 1255 1252 1248 1245 1242 1238 1235
760 1232 1229 1225 1222 1219 1216 1213 1209 1206 1203
770 1200 1197 1194 1191 1188 1185 1182 1179 1175 1172
780 1169 1166 1163 1161 1158 1155 1152 1149 1146 1143
790 1140 1137 1134 1131 1129 1126 1123 1120 1117 1115
800 1112 1109 1106 1103 1101 1098 1095 1093 1090 1087
810 1084 1082 1079 1076 1074 1071 1069 1066 1063 1061
820 1058 1056 1053 1050 1048 1045 1043 1040 1038 1035
830 1033 1030 1028 1025 1023 1020 1018 1016 1013 1011
840 1008 1006 1004 1001 999 996 994 992 989 987
850 985 982 980 978 976 973 971 969 966 964
860 962 960 958 955 953 951 949 947 944 942
870 940 938 936 934 931 929 927 925 923 921
880 919 917 915 913 910 908 906 904 902 900
890 898 896 894 892 890 888 886 884 882 880
900 878 876 875 873 871 869 867 865 863 861
52

Load 50kgf
Diagonal Knoop Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
910 859 857 855 854 852 850 848 846 844 842
920 841 839 837 835 833 832 830 828 826 824
930 823 821 819 817 816 814 812 810 809 807
940 805 804 802 800 798 797 795 793 792 790
950 788 787 785 783 782 780 779 777 775 774
960 772 770 769 767 766 764 762 761 759 758
970 756 755 753 752 750 748 747 745 744 742
980 741 739 738 736 735 733 732 730 729 727
990 726 724 723 722 720 719 717 716 714 713
53

Vickers Hardness Table
Definition
Vickers Hardness: The value calculated according to the following formula from the test load at the time when the test surface
is indented and the surface area obtained from the lengths of diagonals of the indentation by use of diamond indenter in the
form of a right pyramid with a square base having the angle between the opposite face of 136°
HV=0.102
where HK : Vickers hardness
F : test load (N)
S : surface area of indentation ( mm 2 )
d : mean value of the diagonals of the indentation (mm)
Ø: angle between the opposite faces at the vertex of diamond indenter
The numerical value of HV is not attached with unit.
F
S =0.102 2Fsin
d 2
=0.1891 F
d 2
Note: In the case where the unit of test load F is kgf, Vickers hardness shall be calculated according to the following formula:
HV = F
S
=
2Fsin
d 2
F
d 2
= 1.854 x . . . . f: kgf, d: mm)
F
d 2
= 1.854 x 10 6 x . . . . f: gf, d: µm)
= 1.854 x 10 F
6
x . . . . f: kgf, d: µm)
d 2
Ø
2
Ø
2

Vickers Hardness Table
Table of Contents
Load 5 gf (0.005kgf) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Load 10 gf (0.01kgf) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Load 25 gf (0.025kgf) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Load 50gf (0.05kgf) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Load 100gf (0.1kgf) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Load 200gf (0.2kgf) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Load 300gf (0.3kgf) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Load 500gf (0.5kgf) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Load 1000gf (1kgf) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Load 2000gf (2 kgf) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Load 5kgf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Load 10kgf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Load 20kgf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Load 30kgf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Load 50kgf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

Load 5gf (0.005kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
2 2318 2102 1915 1752 1609 1483 1371 1272 1182 1102
3 1030 965 905 851 802 757 715 677 642 609
4 579 551 526 501 479 458 438 420 402 386
5 371 356 343 330 318 306 296 285 276 266
6 258 249 241 234 226 219 213 207 200 195
7 189 184 179 174 169 165 160 156 152 149
8 145 141 138 135 131 128 125 122 120 117
9 114 112 110 107 105 103 101 98.5 96.5 94.6
10 92.7 90.9 89.1 87.4 85.7 84.1 82.5 81.0 79.5 78.0
11 76.6 75.2 73.9 72.6 71.3 70.1 68.9 67.7 66.6 65.5
12 64.4 63.3 62.3 61.3 60.3 59.3 58.4 57.5 56.6 55.7
13 54.9 54.0 53.2 52.4 51.6 50.9 50.1 49.4 48.7 48.0
14 47.3 46.6 46.0 45.3 44.7 44.1 43.5 42.9 42.3 41.8
15 41.2 40.7 40.1 39.6 39.1 38.6 38.1 37.6 37.1 36.7
16 36.2 35.8 35.3 34.9 34.5 34.0 33.6 33.2 32.8 32.5
17 32.1 31.7 31.3 31.0 30.6 30.3 29.9 29.6 29.3 28.9
18 28.6 28.3 28.0 27.7 27.4 27.1 26.8 26.5 26.2 26.0
19 25.7 25.4 25.1 24.9 24.6 24.4 24.1 23.9 23.6 23.4
20 23.2 22.9 22.7 22.5 22.3 22.1 21.8 21.6 21.4 21.2
21 21.0 20.8 20.6 20.4 20.2 20.1 19.9 19.7 19.5 19.3
22 19.2 19.0 18.8 18.6 18.5 18.3 18.1 18.0 17.8 17.7
23 17.5 17.4 17.2 17.1 16.9 16.8 16.6 16.5 16.4 16.2
24 16.1 16.0 15.8 15.7 15.6 15.4 15.3 15.2 15.1 15.0
25 14.8 14.7 14.6 14.5 14.4 14.3 14.1 14.0 13.9 13.8
26 13.7 13.6 13.5 13.4 13.3 13.2 13.1 13.0 12.9 12.8
27 12.7 12.6 12.5 12.4 12.3 12.3 12.2 12.1 12.0 11.9
28 11.8 11.7 11.7 11.6 11.5 11.4 11.3 11.3 11.2 11.1
1

Load 10 gf (0.01kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
3 2060 1929 1811 1702 1604 1513 1431 1354 1284 1219
4 1159 1103 1051 1003 958 916 876 839 805 772
5 742 713 686 660 636 613 591 571 551 533
6 515 498 482 467 453 439 426 413 401 389
7 378 368 358 348 339 330 321 313 305 297
8 290 283 276 269 263 257 251 245 239 234
9 229 224 219 214 210 205 201 197 193 189
10 185 182 178 175 171 168 165 162 159 156
11 153 150 148 145 143 140 138 135 133 131
12 129 127 125 123 121 119 117 115 113 111
13 110 108 106 105 103 102 100 98.8 97.4 96.0
14 94.6 93.3 91.9 90.7 89.4 88.2 87.0 85.8 84.6 83.5
15 82.4 81.3 80.2 79.2 78.2 77.2 76.2 75.2 74.3 73.3
16 72.4 71.5 70.6 69.8 68.9 68.1 67.3 66.5 65.7 64.9
17 64.2 63.4 62.7 61.9 61.2 60.5 59.9 59.2 58.5 57.9
18 57.2 56.6 56.0 55.4 54.8 54.2 53.6 53.0 52.5 51.9
19 51.4 50.8 50.3 49.8 49.3 48.8 48.3 47.8 47.3 46.8
20 46.4 45.9 45.4 45.0 44.6 44.1 43.7 43.3 42.9 42.4
21 42.0 41.6 41.3 40.9 40.5 40.1 39.7 39.4 39.0 38.7
22 38.3 38.0 37.6 37.3 36.9 36.6 36.3 36.0 35.7 35.4
23 35.0 34.7 34.4 34.2 33.9 33.6 33.3 33.0 32.7 32.5
24 32.2 31.9 31.7 31.4 31.1 30.9 30.6 30.4 30.1 29.9
25 29.7 29.4 29.2 29.0 28.7 28.5 28.3 28.1 27.9 27.6
26 27.4 27.2 27.0 26.8 26.6 26.4 26.2 26.0 25.8 25.6
27 25.4 25.2 25.1 24.9 24.7 24.5 24.3 24.2 24.0 23.8
28 23.6 23.5 23.3 23.1 23.0 22.8 22.7 22.5 22.4 22.2
29 22.0 21.9 21.7 21.6 21.4 21.3 21.2 21.0 20.9 20.7
30 20.6 20.5 20.3 20.2 20.1 19.9 19.8 19.7 19.5 19.4
31 19.3 19.2 19.0 18.9 18.8 18.7 18.6 18.4 18.3 18.2
32 18.1 18.0 17.9 17.8 17.7 17.6 17.4 17.3 17.2 17.1
33 17.0 16.9 16.8 16.7 16.6 16.5 16.4 16.3 16.2 16.1
34 16.0 15.9 15.9 15.8 15.7 15.6 15.5 15.4 15.3 15.2
35 15.1 15.0 15.0 14.9 14.8 14.7 14.6 14.5 14.5 14.4
36 14.3 14.2 14.1 14.1 14.0 13.9 13.8 13.8 13.7 13.6
37 13.5 13.5 13.4 13.3 13.3 13.2 13.1 13.0 13.0 12.9
38 12.8 12.8 12.7 12.6 12.6 12.5 12.4 12.4 12.3 12.3
39 12.2 12.1 12.1 12.0 11.9 11.9 11.8 11.8 11.7 11.6
40 11.6 11.5 11.5 11.4 11.4 11.3 11.2 11.2 11.1 11.1
41 11.0 11.0 10.9 10.9 10.8 10.8 10.7 10.7 10.6 10.6
2

Load 25gf (0.025kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
5 1854 1782 1714 1650 1590 1532 1478 1427 1378 1332
6 1288 1246 1206 1168 1132 1097 1064 1033 1002 974
7 946 919 894 870 846 824 802 782 762 743
8 724 706 689 673 657 642 627 612 599 585
9 572 560 548 536 525 514 503 493 483 473
10 464 454 446 437 429 420 413 405 397 390
11 383 376 369 363 357 350 344 339 333 327
12 322 317 311 306 301 297 292 287 283 279
13 274 270 266 262 258 254 251 247 243 240
14 236 233 230 227 224 220 217 214 212 209
15 206 203 201 198 195 193 190 188 186 183
16 181 179 177 174 172 170 168 166 164 162
17 160 159 157 155 153 151 150 148 146 145
18 143 141 140 138 137 135 134 133 131 130
19 128 127 126 124 123 122 121 119 118 117
20 116 115 114 112 111 110 109 108 107 106
21 105 104 103 102 101 100 99.3 98.4 97.5 96.6
22 95.8 94.9 94.0 93.2 92.4 91.6 90.7 89.9 89.2 88.4
23 87.6 86.9 86.1 85.4 84.6 83.9 83.2 82.5 81.8 81.1
24 80.5 79.8 79.1 78.5 77.9 77.2 76.6 76.0 75.4 74.8
25 74.2 73.6 73.0 72.4 71.8 71.3 70.7 70.2 69.6 69.1
26 68.6 68.0 67.5 67.0 66.5 66.0 65.5 65.0 64.5 64.1
27 63.6 63.1 62.6 62.2 61.7 61.3 60.8 60.4 60.0 59.5
28 59.1 58.7 58.3 57.9 57.5 57.1 56.7 56.3 55.9 55.5
29 55.1 54.7 54.4 54.0 53.6 53.3 52.9 52.5 52.2 51.8
30 51.5 51.2 50.8 50.5 50.2 49.8 49.5 49.2 48.9 48.5
31 48.2 47.9 47.6 47.3 47.0 46.7 46.4 46.1 45.8 45.5
32 45.3 45.0 44.7 44.4 44.2 43.9 43.6 43.3 43.1 42.8
33 42.6 42.3 42.1 41.8 41.5 41.3 41.1 40.8 40.6 40.3
34 40.1 39.9 39.6 39.4 39.2 38.9 38.7 38.5 38.3 38.1
35 37.8 37.6 37.4 37.2 37.0 36.8 36.6 36.4 36.2 36.0
36 35.8 35.6 35.4 35.2 35.0 34.8 34.6 34.4 34.2 34.0
37 33.9 33.7 33.5 33.3 33.1 33.0 32.8 32.6 32.4 32.3
38 32.1 31.9 31.8 31.6 31.4 31.3 31.1 30.9 30.8 30.6
39 30.5 30.3 30.2 30.0 29.9 29.7 29.6 29.4 29.3 29.1
40 29.0 28.8 28.7 28.5 28.4 28.3 28.1 28.0 27.8 27.7
41 27.6 27.4 27.3 27.2 27.0 26.9 26.8 26.7 26.5 26.4
42 26.3 26.2 26.0 25.9 25.8 25.7 25.5 25.4 25.3 25.2
43 25.1 25.0 24.8 24.7 24.6 24.5 24.4 24.3 24.2 24.1
44 23.9 23.8 23.7 23.6 23.5 23.4 23.3 23.2 23.1 23.0
45 22.9 22.8 22.7 22.6 22.5 22.4 22.3 22.2 22.1 22.0
46 21.9 21.8 21.7 21.6 21.5 21.4 21.3 21.3 21.2 21.1
47 21.0 20.9 20.8 20.7 20.6 20.5 20.5 20.4 20.3 20.2
48 20.1 20.0 20.0 19.9 19.8 19.7 19.6 19.5 19.5 19.4
49 19.3 19.2 19.1 19.1 19.0 18.9 18.8 18.8 18.7 18.6
3

Load 50gf (0.05kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
7 1892 1839 1788 1740 1693 1648 1605 1564 1524 1485
8 1448 1413 1379 1346 1314 1283 1253 1225 1197 1170
9 1144 1119 1095 1072 1049 1027 1006 985 965 946
10 927 909 891 874 857 841 825 810 795 780
11 766 752 739 726 713 701 689 677 666 655
12 644 633 623 613 603 593 584 575 566 557
13 549 540 532 524 516 509 501 494 487 480
14 473 466 460 453 447 441 435 429 423 418
15 412 407 401 396 391 386 381 376 371 367
16 362 358 353 349 345 340 336 332 328 325
17 321 317 313 310 306 303 299 296 293 289
18 286 283 280 277 274 271 268 265 262 260
19 257 254 251 249 246 244 241 239 236 234
20 232 229 227 225 223 221 218 216 214 212
21 210 208 206 204 202 201 199 197 195 193
22 192 190 188 186 185 183 181 180 178 177
23 175 174 172 171 169 168 166 165 164 162
24 161 160 158 157 156 154 153 152 151 150
25 148 147 146 145 144 143 141 140 139 138
26 137 136 135 134 133 132 131 130 129 128
27 127 126 125 124 123 123 122 121 120 119
28 118 117 117 116 115 114 113 113 112 111
29 110 109 109 108 107 107 106 105 104 104
30 103 102 102 101 100 99.7 99.0 98.4 97.7 97.1
31 96.5 95.8 95.2 94.6 94.0 93.4 92.8 92.2 91.7 91.1
32 90.5 90.0 89.4 88.9 88.3 87.8 87.2 86.7 86.2 85.6
33 85.1 84.6 84.1 83.6 83.1 82.6 82.1 81.6 81.1 80.7
34 80.2 79.7 79.3 78.8 78.3 77.9 77.4 77.0 76.5 76.1
35 75.7 75.2 74.8 74.4 74.0 73.6 73.1 72.7 72.3 71.9
36 71.5 71.1 70.7 70.4 70.0 69.6 69.2 68.8 68.5 68.1
37 67.7 67.3 67.0 66.6 66.3 65.9 65.6 65.2 64.9 64.5
38 64.2 63.9 63.5 63.2 62.9 62.5 62.2 61.9 61.6 61.3
39 60.9 60.6 60.3 60.0 59.7 59.4 59.1 58.8 58.5 58.2
40 57.9 57.6 57.4 57.1 56.8 56.5 56.2 56.0 55.7 55.4
41 55.1 54.9 54.6 54.3 54.1 53.8 53.6 53.3 53.1 52.8
42 52.6 52.3 52.1 51.8 51.6 51.3 51.1 50.8 50.6 50.4
43 50.1 49.9 49.7 49.4 49.2 49.0 48.8 48.5 48.3 48.1
44 47.9 47.7 47.4 47.2 47.0 46.8 46.6 46.4 46.2 46.0
45 45.8 45.6 45.4 45.2 45.0 44.8 44.6 44.4 44.2 44.0
46 43.8 43.6 43.4 43.2 43.1 42.9 42.7 42.5 42.3 42.1
47 42.0 41.8 41.6 41.4 41.3 41.1 40.9 40.7 40.6 40.4
48 40.2 40.1 39.9 39.7 39.6 39.4 39.2 39.1 38.9 38.8
49 38.6 38.5 38.3 38.1 38.0 37.8 37.7 37.5 37.4 37.2
50 37.1 36.9 36.8 36.6 36.5 36.3 36.2 36.1 35.9 35.8
51 35.6 35.5 35.4 35.2 35.1 35.0 34.8 34.7 34.5 34.4
4

Load 50gf (0.05kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
52 34.3 34.2 34.0 33.9 33.8 33.6 33.5 33.4 33.3 33.1
53 33.0 32.9 32.8 32.6 32.5 32.4 32.3 32.1 32.0 31.9
54 31.8 31.7 31.6 31.4 31.3 31.2 31.1 31.0 30.9 30.8
55 30.6 30.5 30.4 30.3 30.2 30.1 30.0 29.9 29.8 29.7
56 29.6 29.5 29.3 29.2 29.1 29.0 28.9 28.8 28.7 28.6
57 28.5 28.4 28.3 28.2 28.1 28.0 27.9 27.8 27.7 27.7
58 27.6 27.5 27.4 27.3 27.2 27.1 27.0 26.9 26.8 26.7
59 26.6 26.5 26.5 26.4 26.3 26.2 26.1 26.0 25.9 25.8
60 25.8 25.7 25.6 25.5 25.4 25.3 25.2 25.2 25.1 25.0
61 24.9 24.8 24.8 24.7 24.6 24.5 24.4 24.4 24.3 24.2
62 24.1 24.0 24.0 23.9 23.8 23.7 23.7 23.6 23.5 23.4
63 23.4 23.3 23.2 23.1 23.1 23.0 22.9 22.8 22.8 22.7
64 22.6 22.6 22.5 22.4 22.4 22.3 22.2 22.1 22.1 22.0
65 21.9 21.9 21.8 21.7 21.7 21.6 21.5 21.5 21.4 21.3
66 21.3 21.2 21.2 21.1 21.0 21.0 20.9 20.8 20.8 20.7
67 20.7 20.6 20.5 20.5 20.4 20.3 20.3 20.2 20.2 20.1
68 20.0 20.0 19.9 19.9 19.8 19.8 19.7 19.6 19.6 19.5
69 19.5 19.4 19.4 19.3 19.2 19.2 19.1 19.1 19.0 19.0
70 18.9 18.9 18.8 18.8 18.7 18.7 18.6 18.5 18.5 18.4
71 18.4 18.3 18.3 18.2 18.2 18.1 18.1 18.0 18.0 17.9
72 17.9 17.8 17.8 17.7 17.7 17.6 17.6 17.5 17.5 17.4
73 17.4 17.3 17.3 17.3 17.2 17.2 17.1 17.1 17.0 17.0
74 16.9 16.9 16.8 16.8 16.7 16.7 16.7 16.6 16.6 16.5
75 16.5 16.4 16.4 16.3 16.3 16.3 16.2 16.2 16.1 16.1
76 16.0 16.0 16.0 15.9 15.9 15.8 15.8 15.8 15.7 15.7
77 15.6 15.6 15.6 15.5 15.5 15.4 15.4 15.4 15.3 15.3
78 15.2 15.2 15.2 15.1 15.1 15.0 15.0 15.0 14.9 14.9
79 14.9 14.8 14.8 14.7 14.7 14.7 14.6 14.6 14.6 14.5
80 14.5 14.4 14.4 14.4 14.3 14.3 14.3 14.2 14.2 14.2
81 14.1 14.1 14.1 14.0 14.0 14.0 13.9 13.9 13.9 13.8
82 13.8 13.8 13.7 13.7 13.7 13.6 13.6 13.6 13.5 13.5
83 13.5 13.4 13.4 13.4 13.3 13.3 13.3 13.2 13.2 13.2
84 13.1 13.1 13.1 13.0 13.0 13.0 13.0 12.9 12.9 12.9
85 12.8 12.8 12.8 12.7 12.7 12.7 12.7 12.6 12.6 12.6
86 12.5 12.5 12.5 12.4 12.4 12.4 12.4 12.3 12.3 12.3
87 12.2 12.2 12.2 12.2 12.1 12.1 12.1 12.1 12.0 12.0
88 12.0 11.9 11.9 11.9 11.9 11.8 11.8 11.8 11.8 11.7
89 11.7 11.7 11.7 11.6 11.6 11.6 11.5 11.5 11.5 11.5
90 11.4 11.4 11.4 11.4 11.3 11.3 11.3 11.3 11.2 11.2
91 11.2 11.2 11.1 11.1 11.1 11.1 11.0 11.0 11.0 11.0
92 11.0 10.9 10.9 10.9 10.9 10.8 10.8 10.8 10.8 10.7
93 10.7 10.7 10.7 10.6 10.6 10.6 10.6 10.6 10.5 10.5
5

Load 100gf (0.1kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
10 1854 1817 1782 1748 1714 1682 1650 1619 1590 1560
11 1532 1505 1478 1452 1427 1402 1378 1354 1332 1309
12 1288 1266 1246 1225 1206 1187 1168 1149 1132 1114
13 1097 1080 1064 1048 1033 1017 1002 988 974 960
14 946 933 919 907 894 882 870 858 846 835
15 824 813 802 792 782 772 762 752 743 733
16 724 715 706 698 689 681 673 665 657 649
17 642 634 627 619 612 605 599 592 585 579
18 572 566 560 554 548 542 536 530 525 519
19 514 508 503 498 493 488 483 478 473 468
20 464 459 454 450 446 441 437 433 429 424
21 420 416 413 409 405 401 397 394 390 387
22 383 380 376 373 369 366 363 360 357 354
23 350 347 344 342 339 336 333 330 327 325
24 322 319 317 314 311 309 306 304 301 299
25 297 294 292 290 287 285 283 281 279 276
26 274 272 270 268 266 264 262 260 258 256
27 254 252 251 249 247 245 243 242 240 238
28 236 235 233 231 230 228 227 225 224 222
29 220 219 217 216 214 213 212 210 209 207
30 206 205 203 202 201 199 198 197 195 194
31 193 192 190 189 188 187 186 184 183 182
32 181 180 179 178 177 176 174 173 172 171
33 170 169 168 167 166 165 164 163 162 161
34 160 159 159 158 157 156 155 154 153 152
35 151 150 150 149 148 147 146 145 145 144
36 143 142 141 141 140 139 138 138 137 136
37 135 135 134 133 133 132 131 130 130 129
38 128 128 127 126 126 125 124 124 123 123
39 122 121 121 120 119 119 118 118 117 116
40 116 115 115 114 114 113 112 112 111 111
41 110 110 109 109 108 108 107 107 106 106
42 105 105 104 104 103 103 102 102 101 101
43 100 99.8 99.3 98.9 98.4 98.0 97.5 97.1 96.6 96.2
44 95.8 95.3 94.9 94.5 94.0 93.6 93.2 92.8 92.4 92.0
45 91.6 91.1 90.7 90.3 89.9 89.6 89.2 88.8 88.4 88.0
46 87.6 87.2 86.9 86.5 86.1 85.7 85.4 85.0 84.6 84.3
47 83.9 83.6 83.2 82.9 82.5 82.2 81.8 81.5 81.1 80.8
48 80.5 80.1 79.8 79.5 79.1 78.8 78.5 78.2 77.9 77.5
49 77.2 76.9 76.6 76.3 76.0 75.7 75.4 75.1 74.8 74.5
50 74.2 73.9 73.6 73.3 73.0 72.7 72.4 72.1 71.8 71.6
51 71.3 71.0 70.7 70.4 70.2 69.9 69.6 69.4 69.1 68.8
52 68.6 68.3 68.0 67.8 67.5 67.3 67.0 66.8 66.5 66.3
53 66.0 65.8 65.5 65.3 65.0 64.8 64.5 64.3 64.1 63.8
54 63.6 63.3 63.1 62.9 62.6 62.4 62.2 62.0 61.7 61.5
6

Load 100gf (0.1kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
55 61.3 61.1 60.8 60.6 60.4 60.2 60.0 59.8 59.5 59.3
56 59.1 58.9 58.7 58.5 58.3 58.1 57.9 57.7 57.5 57.3
57 57.1 56.9 56.7 56.5 56.3 56.1 55.9 55.7 55.5 55.3
58 55.1 54.9 54.7 54.5 54.4 54.2 54.0 53.8 53.6 53.4
59 53.3 53.1 52.9 52.7 52.5 52.4 52.2 52.0 51.8 51.7
60 51.5 51.3 51.2 51.0 50.8 50.7 50.5 50.3 50.2 50.0
61 49.8 49.7 49.5 49.3 49.2 49.0 48.9 48.7 48.5 48.4
62 48.2 48.1 47.9 47.8 47.6 47.5 47.3 47.2 47.0 46.9
63 46.7 46.6 46.4 46.3 46.1 46.0 45.8 45.7 45.5 45.4
64 45.3 45.1 45.0 44.8 44.7 44.6 44.4 44.3 44.2 44.0
65 43.9 43.7 43.6 43.5 43.3 43.2 43.1 43.0 42.8 42.7
66 42.6 42.4 42.3 42.2 42.1 41.9 41.8 41.7 41.5 41.4
67 41.3 41.2 41.1 40.9 40.8 40.7 40.6 40.5 40.3 40.2
68 40.1 40.0 39.9 39.7 39.6 39.5 39.4 39.3 39.2 39.1
69 38.9 38.8 38.7 38.6 38.5 38.4 38.3 38.2 38.1 37.9
70 37.8 37.7 37.6 37.5 37.4 37.3 37.2 37.1 37.0 36.9
71 36.8 36.7 36.6 36.5 36.4 36.3 36.2 36.1 36.0 35.9
72 35.8 35.7 35.6 35.5 35.4 35.3 35.2 35.1 35.0 34.9
73 34.8 34.7 34.6 34.5 34.4 34.3 34.2 34.1 34.0 33.9
74 33.9 33.8 33.7 33.6 33.5 33.4 33.3 33.2 33.1 33.0
75 33.0 32.9 32.8 32.7 32.6 32.5 32.4 32.4 32.3 32.2
76 32.1 32.0 31.9 31.8 31.8 31.7 31.6 31.5 31.4 31.4
77 31.3 31.2 31.1 31.0 30.9 30.9 30.8 30.7 30.6 30.6
78 30.5 30.4 30.3 30.2 30.2 30.1 30.0 29.9 29.9 29.8
79 29.7 29.6 29.6 29.5 29.4 29.3 29.3 29.2 29.1 29.0
80 29.0 28.9 28.8 28.8 28.7 28.6 28.5 28.5 28.4 28.3
81 28.3 28.2 28.1 28.0 28.0 27.9 27.8 27.8 27.7 27.6
82 27.6 27.5 27.4 27.4 27.3 27.2 27.2 27.1 27.0 27.0
83 26.9 26.8 26.8 26.7 26.7 26.6 26.5 26.5 26.4 26.3
84 26.3 26.2 26.2 26.1 26.0 26.0 25.9 25.8 25.8 25.7
85 25.7 25.6 25.5 25.5 25.4 25.4 25.3 25.2 25.2 25.1
86 25.1 25.0 25.0 24.9 24.8 24.8 24.7 24.7 24.6 24.6
87 24.5 24.4 24.4 24.3 24.3 24.2 24.2 24.1 24.1 24.0
88 23.9 23.9 23.8 23.8 23.7 23.7 23.6 23.6 23.5 23.5
89 23.4 23.4 23.3 23.2 23.2 23.1 23.1 23.0 23.0 22.9
90 22.9 22.8 22.8 22.7 22.7 22.6 22.6 22.5 22.5 22.4
91 22.4 22.3 22.3 22.2 22.2 22.1 22.1 22.0 22.0 22.0
92 21.9 21.9 21.8 21.8 21.7 21.7 21.6 21.6 21.5 21.5
93 21.4 21.4 21.3 21.3 21.3 21.2 21.2 21.1 21.1 21.0
94 21.0 20.9 20.9 20.8 20.8 20.8 20.7 20.7 20.6 20.6
95 20.5 20.5 20.5 20.4 20.4 20.3 20.3 20.2 20.2 20.2
96 20.1 20.1 20.0 20.0 20.0 19.9 19.9 19.8 19.8 19.7
97 19.7 19.7 19.6 19.6 19.5 19.5 19.5 19.4 19.4 19.3
98 19.3 19.3 19.2 19.2 19.1 19.1 19.1 19.0 19.0 19.0
99 18.9 18.9 18.8 18.8 18.8 18.7 18.7 18.7 18.6 18.6
7

Load 200gf (0.2kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
14 1892 1865 1839 1813 1788 1764 1740 1716 1693 1670
15 1648 1626 1605 1584 1564 1543 1524 1504 1485 1467
16 1448 1431 1413 1396 1379 1362 1346 1330 1314 1298
17 1283 1268 1253 1239 1225 1211 1197 1184 1170 1157
18 1144 1132 1119 1107 1095 1083 1072 1060 1049 1038
19 1027 1016 1006 995 985 975 965 955 946 936
20 927 918 909 900 891 882 874 865 857 849
21 841 833 825 817 810 802 795 787 780 773
22 766 759 752 746 739 732 726 720 713 707
23 701 695 689 683 677 671 666 660 655 649
24 644 638 633 628 623 618 613 608 603 598
25 593 589 584 579 575 570 566 561 557 553
26 549 544 540 536 532 528 524 520 516 512
27 509 505 501 498 494 490 487 483 480 476
28 473 470 466 463 460 457 453 450 447 444
29 441 438 435 432 429 426 423 420 418 415
30 412 409 407 404 401 399 396 393 391 388
31 386 383 381 378 376 374 371 369 367 364
32 362 360 358 355 353 351 349 347 345 343
33 340 338 336 334 332 330 328 326 325 323
34 321 319 317 315 313 312 310 308 306 304
35 303 301 299 298 296 294 293 291 289 288
36 286 285 283 281 280 278 277 275 274 272
37 271 269 268 267 265 264 262 261 260 258
38 257 255 254 253 251 250 249 248 246 245
39 244 243 241 240 239 238 236 235 234 233
40 232 231 229 228 227 226 225 224 223 222
41 221 220 218 217 216 215 214 213 212 211
42 210 209 208 207 206 205 204 203 202 201
43 201 200 199 198 197 196 195 194 193 192
44 192 191 190 189 188 187 186 186 185 184
45 183 182 181 181 180 179 178 178 177 176
46 175 174 174 173 172 171 171 170 169 169
47 168 167 166 166 165 164 164 163 162 162
48 161 160 160 159 158 158 157 156 156 155
49 154 154 153 153 152 151 151 150 150 149
50 148 148 147 147 146 145 145 144 144 143
51 143 142 141 141 140 140 139 139 138 138
52 137 137 136 136 135 135 134 134 133 133
53 132 132 131 131 130 130 129 129 128 128
54 127 127 126 126 125 125 124 124 123 123
55 123 122 122 121 121 120 120 120 119 119
56 118 118 117 117 117 116 116 115 115 115
57 114 114 113 113 113 112 112 111 111 111
58 110 110 109 109 109 108 108 108 107 107
8

Load 200gf (0.2kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
59 107 106 106 105 105 105 104 104 104 103
60 103 103 102 102 102 101 101 101 100 100
61 99.7 99.3 99.0 98.7 98.4 98.0 97.7 97.4 97.1 96.8
62 96.5 96.2 95.8 95.5 95.2 94.9 94.6 94.3 94.0 93.7
63 93.4 93.1 92.8 92.5 92.2 92.0 91.7 91.4 91.1 90.8
64 90.5 90.2 90.0 89.7 89.4 89.1 88.9 88.6 88.3 88.0
65 87.8 87.5 87.2 87.0 86.7 86.4 86.2 85.9 85.6 85.4
66 85.1 84.9 84.6 84.4 84.1 83.8 83.6 83.3 83.1 82.8
67 82.6 82.4 82.1 81.9 81.6 81.4 81.1 80.9 80.7 80.4
68 80.2 80.0 79.7 79.5 79.3 79.0 78.8 78.6 78.3 78.1
69 77.9 77.7 77.4 77.2 77.0 76.8 76.5 76.3 76.1 75.9
70 75.7 75.5 75.2 75.0 74.8 74.6 74.4 74.2 74.0 73.8
71 73.6 73.4 73.1 72.9 72.7 72.5 72.3 72.1 71.9 71.7
72 71.5 71.3 71.1 70.9 70.7 70.5 70.4 70.2 70.0 69.8
73 69.6 69.4 69.2 69.0 68.8 68.6 68.5 68.3 68.1 67.9
74 67.7 67.5 67.3 67.2 67.0 66.8 66.6 66.5 66.3 66.1
75 65.9 65.7 65.6 65.4 65.2 65.0 64.9 64.7 64.5 64.4
76 64.2 64.0 63.9 63.7 63.5 63.4 63.2 63.0 62.9 62.7
77 62.5 62.4 62.2 62.1 61.9 61.7 61.6 61.4 61.3 61.1
78 60.9 60.8 60.6 60.5 60.3 60.2 60.0 59.9 59.7 59.6
79 59.4 59.3 59.1 59.0 58.8 58.7 58.5 58.4 58.2 58.1
80 57.9 57.8 57.6 57.5 57.4 57.2 57.1 56.9 56.8 56.7
81 56.5 56.4 56.2 56.1 56.0 55.8 55.7 55.6 55.4 55.3
82 55.1 55.0 54.9 54.7 54.6 54.5 54.3 54.2 54.1 54.0
83 53.8 53.7 53.6 53.4 53.3 53.2 53.1 52.9 52.8 52.7
84 52.6 52.4 52.3 52.2 52.1 51.9 51.8 51.7 51.6 51.4
85 51.3 51.2 51.1 51.0 50.8 50.7 50.6 50.5 50.4 50.3
86 50.1 50.0 49.9 49.8 49.7 49.6 49.4 49.3 49.2 49.1
87 49.0 48.9 48.8 48.7 48.5 48.4 48.3 48.2 48.1 48.0
88 47.9 47.8 47.7 47.6 47.4 47.3 47.2 47.1 47.0 46.9
89 46.8 46.7 46.6 46.5 46.4 46.3 46.2 46.1 46.0 45.9
90 45.8 45.7 45.6 45.5 45.4 45.3 45.2 45.1 45.0 44.9
91 44.8 44.7 44.6 44.5 44.4 44.3 44.2 44.1 44.0 43.9
92 43.8 43.7 43.6 43.5 43.4 43.3 43.2 43.1 43.1 43.0
93 42.9 42.8 42.7 42.6 42.5 42.4 42.3 42.2 42.1 42.1
94 42.0 41.9 41.8 41.7 41.6 41.5 41.4 41.3 41.3 41.2
95 41.1 41.0 40.9 40.8 40.7 40.7 40.6 40.5 40.4 40.3
96 40.2 40.2 40.1 40.0 39.9 39.8 39.7 39.7 39.6 39.5
97 39.4 39.3 39.2 39.2 39.1 39.0 38.9 38.8 38.8 38.7
98 38.6 38.5 38.5 38.4 38.3 38.2 38.1 38.1 38.0 37.9
99 37.8 37.8 37.7 37.6 37.5 37.5 37.4 37.3 37.2 37.2
100 37.1 37.0 36.9 36.9 36.8 36.7 36.6 36.6 36.5 36.4
101 36.3 36.3 36.2 36.1 36.1 36.0 35.9 35.9 35.8 35.7
102 35.6 35.6 35.5 35.4 35.4 35.3 35.2 35.2 35.1 35.0
103 35.0 34.9 34.8 34.7 34.7 34.6 34.5 34.5 34.4 34.3
9

Load 200gf (0.2kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
104 34.3 34.2 34.2 34.1 34.0 34.0 33.9 33.8 33.8 33.7
105 33.6 33.6 33.5 33.4 33.4 33.3 33.3 33.2 33.1 33.1
106 33.0 32.9 32.9 32.8 32.8 32.7 32.6 32.6 32.5 32.4
107 32.4 32.3 32.3 32.2 32.1 32.1 32.0 32.0 31.9 31.8
108 31.8 31.7 31.7 31.6 31.6 31.5 31.4 31.4 31.3 31.3
109 31.2 31.2 31.1 31.0 31.0 30.9 30.9 30.8 30.8 30.7
110 30.6 30.6 30.5 30.5 30.4 30.4 30.3 30.3 30.2 30.1
111 30.1 30.0 30.0 29.9 29.9 29.8 29.8 29.7 29.7 29.6
112 29.6 29.5 29.5 29.4 29.3 29.3 29.2 29.2 29.1 29.1
113 29.0 29.0 28.9 28.9 28.8 28.8 28.7 28.7 28.6 28.6
114 28.5 28.5 28.4 28.4 28.3 28.3 28.2 28.2 28.1 28.1
115 28.0 28.0 27.9 27.9 27.8 27.8 27.7 27.7 27.7 27.6
116 27.6 27.5 27.5 27.4 27.4 27.3 27.3 27.2 27.2 27.1
117 27.1 27.0 27.0 26.9 26.9 26.9 26.8 26.8 26.7 26.7
118 26.6 26.6 26.5 26.5 26.5 26.4 26.4 26.3 26.3 26.2
119 26.2 26.1 26.1 26.1 26.0 26.0 25.9 25.9 25.8 25.8
120 25.8 25.7 25.7 25.6 25.6 25.5 25.5 25.5 25.4 25.4
121 25.3 25.3 25.2 25.2 25.2 25.1 25.1 25.0 25.0 25.0
122 24.9 24.9 24.8 24.8 24.8 24.7 24.7 24.6 24.6 24.5
123 24.5 24.5 24.4 24.4 24.4 24.3 24.3 24.2 24.2 24.2
124 24.1 24.1 24.0 24.0 24.0 23.9 23.9 23.8 23.8 23.8
125 23.7 23.7 23.7 23.6 23.6 23.5 23.5 23.5 23.4 23.4
126 23.4 23.3 23.3 23.2 23.2 23.2 23.1 23.1 23.1 23.0
127 23.0 23.0 22.9 22.9 22.8 22.8 22.8 22.7 22.7 22.7
128 22.6 22.6 22.6 22.5 22.5 22.5 22.4 22.4 22.4 22.3
129 22.3 22.2 22.2 22.2 22.1 22.1 22.1 22.0 22.0 22.0
130 21.9 21.9 21.9 21.8 21.8 21.8 21.7 21.7 21.7 21.6
131 21.6 21.6 21.5 21.5 21.5 21.4 21.4 21.4 21.3 21.3
132 21.3 21.2 21.2 21.2 21.2 21.1 21.1 21.1 21.0 21.0
133 21.0 20.9 20.9 20.9 20.8 20.8 20.8 20.7 20.7 20.7
134 20.7 20.6 20.6 20.6 20.5 20.5 20.5 20.4 20.4 20.4
135 20.3 20.3 20.3 20.3 20.2 20.2 20.2 20.1 20.1 20.1
136 20.0 20.0 20.0 20.0 19.9 19.9 19.9 19.8 19.8 19.8
137 19.8 19.7 19.7 19.7 19.6 19.6 19.6 19.6 19.5 19.5
138 19.5 19.4 19.4 19.4 19.4 19.3 19.3 19.3 19.2 19.2
139 19.2 19.2 19.1 19.1 19.1 19.1 19.0 19.0 19.0 18.9
140 18.9 18.9 18.9 18.8 18.8 18.8 18.8 18.7 18.7 18.7
141 18.7 18.6 18.6 18.6 18.5 18.5 18.5 18.5 18.4 18.4
142 18.4 18.4 18.3 18.3 18.3 18.3 18.2 18.2 18.2 18.2
143 18.1 18.1 18.1 18.1 18.0 18.0 18.0 18.0 17.9 17.9
144 17.9 17.9 17.8 17.8 17.8 17.8 17.7 17.7 17.7 17.7
145 17.6 17.6 17.6 17.6 17.5 17.5 17.5 17.5 17.4 17.4
146 17.4 17.4 17.3 17.3 17.3 17.3 17.3 17.2 17.2 17.2
147 17.2 17.1 17.1 17.1 17.1 17.0 17.0 17.0 17.0 17.0
148 16.9 16.9 16.9 16.9 16.8 16.8 16.8 16.8 16.7 16.7
10

Load 300gf (0.3kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
18 1717 1698 1679 1661 1643 1625 1608 1591 1574 1557
19 1541 1525 1509 1493 1478 1463 1448 1433 1419 1405
20 1391 1377 1363 1350 1337 1323 1311 1298 1286 1273
21 1261 1249 1238 1226 1215 1203 1192 1181 1170 1160
22 1149 1139 1129 1118 1108 1099 1089 1079 1070 1061
23 1051 1042 1033 1025 1016 1007 999 990 982 974
24 966 958 950 942 934 927 919 912 904 897
25 890 883 876 869 862 855 849 842 836 829
26 823 816 810 804 798 792 786 780 774 769
27 763 757 752 746 741 735 730 725 720 715
28 709 704 699 694 690 685 680 675 671 666
29 661 657 652 648 643 639 635 631 626 622
30 618 614 610 606 602 598 594 590 586 583
31 579 575 571 568 564 561 557 553 550 547
32 543 540 536 533 530 527 523 520 517 514
33 511 508 505 502 499 496 493 490 487 484
34 481 478 476 473 470 467 465 462 459 457
35 454 451 449 446 444 441 439 436 434 432
36 429 427 424 422 420 417 415 413 411 408
37 406 404 402 400 398 396 393 391 389 387
38 385 383 381 379 377 375 373 371 369 368
39 366 364 362 360 358 356 355 353 351 349
40 348 346 344 342 341 339 337 336 334 332
41 331 329 328 326 325 323 321 320 318 317
42 315 314 312 311 309 308 306 305 304 302
43 301 299 298 297 295 294 293 291 290 289
44 287 286 285 283 282 281 280 278 277 276
45 275 273 272 271 270 269 267 266 265 264
46 263 262 261 259 258 257 256 255 254 253
47 252 251 250 249 248 247 245 244 243 242
48 241 240 239 238 237 236 235 235 234 233
49 232 231 230 229 228 227 226 225 224 223
50 222 222 221 220 219 218 217 216 216 215
51 214 213 212 211 211 210 209 208 207 206
52 206 205 204 203 203 202 201 200 200 199
53 198 197 197 196 195 194 194 193 192 191
54 191 190 189 189 188 187 187 186 185 185
55 184 183 183 182 181 181 180 179 179 178
56 177 177 176 175 175 174 174 173 172 172
57 171 171 170 169 169 168 168 167 166 166
58 165 165 164 164 163 163 162 161 161 160
59 160 159 159 158 158 157 157 156 156 155
60 155 154 153 153 152 152 151 151 150 150
61 149 149 149 148 148 147 147 146 146 145
62 145 144 144 143 143 142 142 141 141 141
11

Load 300gf (0.3kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
63 140 140 139 139 138 138 138 137 137 136
64 136 135 135 135 134 134 133 133 132 132
65 132 131 131 130 130 130 129 129 128 128
66 128 127 127 127 126 126 125 125 125 124
67 124 124 123 123 122 122 122 121 121 121
68 120 120 120 119 119 119 118 118 118 117
69 117 116 116 116 115 115 115 114 114 114
70 114 113 113 113 112 112 112 111 111 111
71 110 110 110 109 109 109 108 108 108 108
72 107 107 107 106 106 106 106 105 105 105
73 104 104 104 104 103 103 103 102 102 102
74 102 101 101 101 100 100 99.9 99.7 99.4 99.1
75 98.9 98.6 98.4 98.1 97.8 97.6 97.3 97.1 96.8 96.5
76 96.3 96.0 95.8 95.5 95.3 95.0 94.8 94.5 94.3 94.1
77 93.8 93.6 93.3 93.1 92.8 92.6 92.4 92.1 91.9 91.7
78 91.4 91.2 91.0 90.7 90.5 90.3 90.0 89.8 89.6 89.3
79 89.1 88.9 88.7 88.4 88.2 88.0 87.8 87.6 87.3 87.1
80 86.9 86.7 86.5 86.3 86.0 85.8 85.6 85.4 85.2 85.0
81 84.8 84.6 84.4 84.1 83.9 83.7 83.5 83.3 83.1 82.9
82 82.7 82.5 82.3 82.1 81.9 81.7 81.5 81.3 81.1 80.9
83 80.7 80.5 80.3 80.2 80.0 79.8 79.6 79.4 79.2 79.0
84 78.8 78.6 78.5 78.3 78.1 77.9 77.7 77.5 77.3 77.2
85 77.0 76.8 76.6 76.4 76.3 76.1 75.9 75.7 75.6 75.4
86 75.2 75.0 74.9 74.7 74.5 74.3 74.2 74.0 73.8 73.7
87 73.5 73.3 73.1 73.0 72.8 72.6 72.5 72.3 72.2 72.0
88 71.8 71.7 71.5 71.3 71.2 71.0 70.9 70.7 70.5 70.4
89 70.2 70.1 69.9 69.7 69.6 69.4 69.3 69.1 69.0 68.8
90 68.7 68.5 68.4 68.2 68.1 67.9 67.8 67.6 67.5 67.3
91 67.2 67.0 66.9 66.7 66.6 66.4 66.3 66.1 66.0 65.9
92 65.7 65.6 65.4 65.3 65.1 65.0 64.9 64.7 64.6 64.4
93 64.3 64.2 64.0 63.9 63.8 63.6 63.5 63.4 63.2 63.1
94 62.9 62.8 62.7 62.5 62.4 62.3 62.2 62.0 61.9 61.8
95 61.6 61.5 61.4 61.2 61.1 61.0 60.9 60.7 60.6 60.5
96 60.4 60.2 60.1 60.0 59.9 59.7 59.6 59.5 59.4 59.2
97 59.1 59.0 58.9 58.7 58.6 58.5 58.4 58.3 58.2 58.0
98 57.9 57.8 57.7 57.6 57.4 57.3 57.2 57.1 57.0 56.9
99 56.7 56.6 56.5 56.4 56.3 56.2 56.1 56.0 55.8 55.7
100 55.6 55.5 55.4 55.3 55.2 55.1 55.0 54.8 54.7 54.6
101 54.5 54.4 54.3 54.2 54.1 54.0 53.9 53.8 53.7 53.6
102 53.5 53.4 53.3 53.1 53.0 52.9 52.8 52.7 52.6 52.5
103 52.4 52.3 52.2 52.1 52.0 51.9 51.8 51.7 51.6 51.5
104 51.4 51.3 51.2 51.1 51.0 50.9 50.8 50.7 50.6 50.5
105 50.4 50.4 50.3 50.2 50.1 50.0 49.9 49.8 49.7 49.6
106 49.5 49.4 49.3 49.2 49.1 49.0 48.9 48.9 48.8 48.7
107 48.6 48.5 48.4 48.3 48.2 48.1 48.0 48.0 47.9 47.8
12

Load 300gf (0.3kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
108 47.7 47.6 47.5 47.4 47.3 47.2 47.2 47.1 47.0 46.9
109 46.8 46.7 46.6 46.6 46.5 46.4 46.3 46.2 46.1 46.1
110 46.0 45.9 45.8 45.7 45.6 45.6 45.5 45.4 45.3 45.2
111 45.1 45.1 45.0 44.9 44.8 44.7 44.7 44.6 44.5 44.4
112 44.3 44.3 44.2 44.1 44.0 43.9 43.9 43.8 43.7 43.6
113 43.6 43.5 43.4 43.3 43.3 43.2 43.1 43.0 42.9 42.9
114 42.8 42.7 42.6 42.6 42.5 42.4 42.4 42.3 42.2 42.1
115 42.1 42.0 41.9 41.8 41.8 41.7 41.6 41.5 41.5 41.4
116 41.3 41.3 41.2 41.1 41.1 41.0 40.9 40.8 40.8 40.7
117 40.6 40.6 40.5 40.4 40.4 40.3 40.2 40.1 40.1 40.0
118 39.9 39.9 39.8 39.7 39.7 39.6 39.5 39.5 39.4 39.3
119 39.3 39.2 39.1 39.1 39.0 38.9 38.9 38.8 38.8 38.7
120 38.6 38.6 38.5 38.4 38.4 38.3 38.2 38.2 38.1 38.1
121 38.0 37.9 37.9 37.8 37.7 37.7 37.6 37.6 37.5 37.4
122 37.4 37.3 37.2 37.2 37.1 37.1 37.0 36.9 36.9 36.8
123 36.8 36.7 36.6 36.6 36.5 36.5 36.4 36.3 36.3 36.2
124 36.2 36.1 36.1 36.0 35.9 35.9 35.8 35.8 35.7 35.7
125 35.6 35.5 35.5 35.4 35.4 35.3 35.3 35.2 35.1 35.1
126 35.0 35.0 34.9 34.9 34.8 34.8 34.7 34.6 34.6 34.5
127 34.5 34.4 34.4 34.3 34.3 34.2 34.2 34.1 34.1 34.0
128 33.9 33.9 33.8 33.8 33.7 33.7 33.6 33.6 33.5 33.5
129 33.4 33.4 33.3 33.3 33.2 33.2 33.1 33.1 33.0 33.0
130 32.9 32.9 32.8 32.8 32.7 32.7 32.6 32.6 32.5 32.5
131 32.4 32.4 32.3 32.3 32.2 32.2 32.1 32.1 32.0 32.0
132 31.9 31.9 31.8 31.8 31.7 31.7 31.6 31.6 31.5 31.5
133 31.4 31.4 31.3 31.3 31.3 31.2 31.2 31.1 31.1 31.0
134 31.0 30.9 30.9 30.8 30.8 30.7 30.7 30.7 30.6 30.6
135 30.5 30.5 30.4 30.4 30.3 30.3 30.2 30.2 30.2 30.1
136 30.1 30.0 30.0 29.9 29.9 29.9 29.8 29.8 29.7 29.7
137 29.6 29.6 29.5 29.5 29.5 29.4 29.4 29.3 29.3 29.2
138 29.2 29.2 29.1 29.1 29.0 29.0 29.0 28.9 28.9 28.8
139 28.8 28.7 28.7 28.7 28.6 28.6 28.5 28.5 28.5 28.4
140 28.4 28.3 28.3 28.3 28.2 28.2 28.1 28.1 28.1 28.0
141 28.0 27.9 27.9 27.9 27.8 27.8 27.7 27.7 27.7 27.6
142 27.6 27.5 27.5 27.5 27.4 27.4 27.4 27.3 27.3 27.2
143 27.2 27.2 27.1 27.1 27.0 27.0 27.0 26.9 26.9 26.9
144 26.8 26.8 26.7 26.7 26.7 26.6 26.6 26.6 26.5 26.5
145 26.5 26.4 26.4 26.3 26.3 26.3 26.2 26.2 26.2 26.1
146 26.1 26.1 26.0 26.0 26.0 25.9 25.9 25.8 25.8 25.8
147 25.7 25.7 25.7 25.6 25.6 25.6 25.5 25.5 25.5 25.4
148 25.4 25.4 25.3 25.3 25.3 25.2 25.2 25.2 25.1 25.1
149 25.1 25.0 25.0 25.0 24.9 24.9 24.9 24.8 24.8 24.8
150 24.7 24.7 24.7 24.6 24.6 24.6 24.5 24.5 24.5 24.4
151 24.4 24.4 24.3 24.3 24.3 24.2 24.2 24.2 24.1 24.1
152 24.1 24.0 24.0 24.0 23.9 23.9 23.9 23.9 23.8 23.8
13

Load 500gf (0.5kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
22 1915 1898 1881 1864 1847 1831 1815 1799 1783 1768
23 1752 1737 1722 1708 1693 1679 1664 1650 1637 1623
24 1609 1596 1583 1570 1557 1544 1532 1519 1507 1495
25 1483 1471 1460 1448 1437 1426 1414 1404 1393 1382
26 1371 1361 1350 1340 1330 1320 1310 1300 1291 1281
27 1272 1262 1253 1244 1235 1226 1217 1208 1199 1191
28 1182 1174 1166 1157 1149 1141 1133 1125 1118 1110
29 1102 1095 1087 1080 1072 1065 1058 1051 1044 1037
30 1030 1023 1016 1010 1003 997 990 984 977 971
31 965 958 952 946 940 934 928 922 917 911
32 905 900 894 889 883 878 872 867 862 856
33 851 846 841 836 831 826 821 816 811 807
34 802 797 793 788 783 779 774 770 765 761
35 757 752 748 744 740 736 731 727 723 719
36 715 711 707 704 700 696 692 688 685 681
37 677 673 670 666 663 659 656 652 649 645
38 642 639 635 632 629 625 622 619 616 613
39 609 606 603 600 597 594 591 588 585 582
40 579 576 574 571 568 565 562 560 557 554
41 551 549 546 543 541 538 536 533 531 528
42 526 523 521 518 516 513 511 508 506 504
43 501 499 497 494 492 490 488 485 483 481
44 479 477 474 472 470 468 466 464 462 460
45 458 456 454 452 450 448 446 444 442 440
46 438 436 434 432 431 429 427 425 423 421
47 420 418 416 414 413 411 409 407 406 404
48 402 401 399 397 396 394 392 391 389 388
49 386 385 383 381 380 378 377 375 374 372
50 371 369 368 366 365 363 362 361 359 358
51 356 355 354 352 351 350 348 347 345 344
52 343 342 340 339 338 336 335 334 333 331
53 330 329 328 326 325 324 323 321 320 319
54 318 317 316 314 313 312 311 310 309 308
55 306 305 304 303 302 301 300 299 298 297
56 296 295 293 292 291 290 289 288 287 286
57 285 284 283 282 281 280 279 278 277 277
58 276 275 274 273 272 271 270 269 268 267
59 266 265 265 264 263 262 261 260 259 258
60 258 257 256 255 254 253 252 252 251 250
61 249 248 248 247 246 245 244 244 243 242
62 241 240 240 239 238 237 237 236 235 234
63 234 233 232 231 231 230 229 228 228 227
64 226 226 225 224 224 223 222 221 221 220
65 219 219 218 217 217 216 215 215 214 213
66 213 212 212 211 210 210 209 208 208 207
14

Load 500gf (0.5kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
67 207 206 205 205 204 203 203 202 202 201
68 200 200 199 199 198 198 197 196 196 195
69 195 194 194 193 192 192 191 191 190 190
70 189 189 188 188 187 187 186 185 185 184
71 184 183 183 182 182 181 181 180 180 179
72 179 178 178 177 177 176 176 175 175 174
73 174 173 173 173 172 172 171 171 170 170
74 169 169 168 168 167 167 167 166 166 165
75 165 164 164 163 163 163 162 162 161 161
76 160 160 160 159 159 158 158 158 157 157
77 156 156 156 155 155 154 154 154 153 153
78 152 152 152 151 151 150 150 150 149 149
79 149 148 148 147 147 147 146 146 146 145
80 145 144 144 144 143 143 143 142 142 142
81 141 141 141 140 140 140 139 139 139 138
82 138 138 137 137 137 136 136 136 135 135
83 135 134 134 134 133 133 133 132 132 132
84 131 131 131 130 130 130 130 129 129 129
85 128 128 128 127 127 127 127 126 126 126
86 125 125 125 124 124 124 124 123 123 123
87 122 122 122 122 121 121 121 121 120 120
88 120 119 119 119 119 118 118 118 118 117
89 117 117 117 116 116 116 115 115 115 115
90 114 114 114 114 113 113 113 113 112 112
91 112 112 111 111 111 111 110 110 110 110
92 110 109 109 109 109 108 108 108 108 107
93 107 107 107 106 106 106 106 106 105 105
94 105 105 104 104 104 104 104 103 103 103
95 103 102 102 102 102 102 101 101 101 101
96 101 100 100 100 99.8 99.5 99.3 99.1 98.9 98.7
97 98.5 98.3 98.1 97.9 97.7 97.5 97.3 97.1 96.9 96.7
98 96.5 96.3 96.1 95.9 95.7 95.5 95.4 95.2 95.0 94.8
99 94.6 94.4 94.2 94.0 93.8 93.6 93.4 93.3 93.1 92.9
100 92.7 92.5 92.3 92.1 92.0 91.8 91.6 91.4 91.2 91.1
101 90.9 90.7 90.5 90.3 90.2 90.0 89.8 89.6 89.5 89.3
102 89.1 88.9 88.8 88.6 88.4 88.2 88.1 87.9 87.7 87.5
103 87.4 87.2 87.0 86.9 86.7 86.5 86.4 86.2 86.0 85.9
104 85.7 85.5 85.4 85.2 85.1 84.9 84.7 84.6 84.4 84.2
105 84.1 83.9 83.8 83.6 83.4 83.3 83.1 83.0 82.8 82.7
106 82.5 82.3 82.2 82.0 81.9 81.7 81.6 81.4 81.3 81.1
107 81.0 80.8 80.7 80.5 80.4 80.2 80.1 79.9 79.8 79.6
108 79.5 79.3 79.2 79.0 78.9 78.7 78.6 78.5 78.3 78.2
109 78.0 77.9 77.7 77.6 77.5 77.3 77.2 77.0 76.9 76.8
110 76.6 76.5 76.3 76.2 76.1 75.9 75.8 75.6 75.5 75.4
111 75.2 75.1 75.0 74.8 74.7 74.6 74.4 74.3 74.2 74.0
15

Load 500gf (0.5kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
112 73.9 73.8 73.6 73.5 73.4 73.2 73.1 73.0 72.9 72.7
113 72.6 72.5 72.3 72.2 72.1 72.0 71.8 71.7 71.6 71.5
114 71.3 71.2 71.1 71.0 70.8 70.7 70.6 70.5 70.3 70.2
115 70.1 70.0 69.9 69.7 69.6 69.5 69.4 69.2 69.1 69.0
116 68.9 68.8 68.7 68.5 68.4 68.3 68.2 68.1 68.0 67.8
117 67.7 67.6 67.5 67.4 67.3 67.1 67.0 66.9 66.8 66.7
118 66.6 66.5 66.4 66.2 66.1 66.0 65.9 65.8 65.7 65.6
119 65.5 65.4 65.2 65.1 65.0 64.9 64.8 64.7 64.6 64.5
120 64.4 64.3 64.2 64.1 63.9 63.8 63.7 63.6 63.5 63.4
121 63.3 63.2 63.1 63.0 62.9 62.8 62.7 62.6 62.5 62.4
122 62.3 62.2 62.1 62.0 61.9 61.8 61.7 61.6 61.5 61.4
123 61.3 61.2 61.1 61.0 60.9 60.8 60.7 60.6 60.5 60.4
124 60.3 60.2 60.1 60.0 59.9 59.8 59.7 59.6 59.5 59.4
125 59.3 59.2 59.1 59.0 59.0 58.9 58.8 58.7 58.6 58.5
126 58.4 58.3 58.2 58.1 58.0 57.9 57.8 57.7 57.7 57.6
127 57.5 57.4 57.3 57.2 57.1 57.0 56.9 56.8 56.8 56.7
128 56.6 56.5 56.4 56.3 56.2 56.1 56.1 56.0 55.9 55.8
129 55.7 55.6 55.5 55.4 55.4 55.3 55.2 55.1 55.0 54.9
130 54.9 54.8 54.7 54.6 54.5 54.4 54.3 54.3 54.2 54.1
131 54.0 53.9 53.9 53.8 53.7 53.6 53.5 53.4 53.4 53.3
132 53.2 53.1 53.0 53.0 52.9 52.8 52.7 52.6 52.6 52.5
133 52.4 52.3 52.2 52.2 52.1 52.0 51.9 51.9 51.8 51.7
134 51.6 51.5 51.5 51.4 51.3 51.2 51.2 51.1 51.0 50.9
135 50.9 50.8 50.7 50.6 50.6 50.5 50.4 50.3 50.3 50.2
136 50.1 50.0 50.0 49.9 49.8 49.8 49.7 49.6 49.5 49.5
137 49.4 49.3 49.2 49.2 49.1 49.0 49.0 48.9 48.8 48.7
138 48.7 48.6 48.5 48.5 48.4 48.3 48.3 48.2 48.1 48.0
139 48.0 47.9 47.8 47.8 47.7 47.6 47.6 47.5 47.4 47.4
140 47.3 47.2 47.2 47.1 47.0 47.0 46.9 46.8 46.8 46.7
141 46.6 46.6 46.5 46.4 46.4 46.3 46.2 46.2 46.1 46.0
142 46.0 45.9 45.8 45.8 45.7 45.7 45.6 45.5 45.5 45.4
143 45.3 45.3 45.2 45.1 45.1 45.0 45.0 44.9 44.8 44.8
144 44.7 44.6 44.6 44.5 44.5 44.4 44.3 44.3 44.2 44.2
145 44.1 44.0 44.0 43.9 43.8 43.8 43.7 43.7 43.6 43.5
146 43.5 43.4 43.4 43.3 43.3 43.2 43.1 43.1 43.0 43.0
147 42.9 42.8 42.8 42.7 42.7 42.6 42.6 42.5 42.4 42.4
148 42.3 42.3 42.2 42.1 42.1 42.0 42.0 41.9 41.9 41.8
149 41.8 41.7 41.6 41.6 41.5 41.5 41.4 41.4 41.3 41.3
150 41.2 41.1 41.1 41.0 41.0 40.9 40.9 40.8 40.8 40.7
151 40.7 40.6 40.5 40.5 40.4 40.4 40.3 40.3 40.2 40.2
152 40.1 40.1 40.0 40.0 39.9 39.9 39.8 39.8 39.7 39.7
153 39.6 39.5 39.5 39.4 39.4 39.3 39.3 39.2 39.2 39.1
154 39.1 39.0 39.0 38.9 38.9 38.8 38.8 38.7 38.7 38.6
155 38.6 38.5 38.5 38.4 38.4 38.3 38.3 38.2 38.2 38.1
156 38.1 38.0 38.0 37.9 37.9 37.8 37.8 37.8 37.7 37.7
16

Load 500gf (0.5kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
157 37.6 37.6 37.5 37.5 37.4 37.4 37.3 37.3 37.2 37.2
158 37.1 37.1 37.0 37.0 36.9 36.9 36.9 36.8 36.8 36.7
159 36.7 36.6 36.6 36.5 36.5 36.4 36.4 36.3 36.3 36.3
160 36.2 36.2 36.1 36.1 36.0 36.0 35.9 35.9 35.9 35.8
161 35.8 35.7 35.7 35.6 35.6 35.5 35.5 35.5 35.4 35.4
162 35.3 35.3 35.2 35.2 35.1 35.1 35.1 35.0 35.0 34.9
163 34.9 34.8 34.8 34.8 34.7 34.7 34.6 34.6 34.6 34.5
164 34.5 34.4 34.4 34.3 34.3 34.3 34.2 34.2 34.1 34.1
165 34.0 34.0 34.0 33.9 33.9 33.8 33.8 33.8 33.7 33.7
166 33.6 33.6 33.6 33.5 33.5 33.4 33.4 33.4 33.3 33.3
167 33.2 33.2 33.2 33.1 33.1 33.0 33.0 33.0 32.9 32.9
168 32.8 32.8 32.8 32.7 32.7 32.6 32.6 32.6 32.5 32.5
169 32.5 32.4 32.4 32.3 32.3 32.3 32.2 32.2 32.2 32.1
170 32.1 32.0 32.0 32.0 31.9 31.9 31.9 31.8 31.8 31.7
171 31.7 31.7 31.6 31.6 31.6 31.5 31.5 31.4 31.4 31.4
172 31.3 31.3 31.3 31.2 31.2 31.2 31.1 31.1 31.0 31.0
173 31.0 30.9 30.9 30.9 30.8 30.8 30.8 30.7 30.7 30.7
174 30.6 30.6 30.5 30.5 30.5 30.4 30.4 30.4 30.3 30.3
175 30.3 30.2 30.2 30.2 30.1 30.1 30.1 30.0 30.0 30.0
176 29.9 29.9 29.9 29.8 29.8 29.8 29.7 29.7 29.7 29.6
177 29.6 29.6 29.5 29.5 29.5 29.4 29.4 29.4 29.3 29.3
178 29.3 29.2 29.2 29.2 29.1 29.1 29.1 29.0 29.0 29.0
179 28.9 28.9 28.9 28.8 28.8 28.8 28.7 28.7 28.7 28.6
180 28.6 28.6 28.5 28.5 28.5 28.5 28.4 28.4 28.4 28.3
181 28.3 28.3 28.2 28.2 28.2 28.1 28.1 28.1 28.0 28.0
182 28.0 28.0 27.9 27.9 27.9 27.8 27.8 27.8 27.7 27.7
183 27.7 27.7 27.6 27.6 27.6 27.5 27.5 27.5 27.4 27.4
184 27.4 27.4 27.3 27.3 27.3 27.2 27.2 27.2 27.1 27.1
185 27.1 27.1 27.0 27.0 27.0 26.9 26.9 26.9 26.9 26.8
186 26.8 26.8 26.7 26.7 26.7 26.7 26.6 26.6 26.6 26.5
187 26.5 26.5 26.5 26.4 26.4 26.4 26.3 26.3 26.3 26.3
188 26.2 26.2 26.2 26.1 26.1 26.1 26.1 26.0 26.0 26.0
189 26.0 25.9 25.9 25.9 25.8 25.8 25.8 25.8 25.7 25.7
190 25.7 25.7 25.6 25.6 25.6 25.5 25.5 25.5 25.5 25.4
191 25.4 25.4 25.4 25.3 25.3 25.3 25.3 25.2 25.2 25.2
192 25.1 25.1 25.1 25.1 25.0 25.0 25.0 25.0 24.9 24.9
193 24.9 24.9 24.8 24.8 24.8 24.8 24.7 24.7 24.7 24.7
194 24.6 24.6 24.6 24.6 24.5 24.5 24.5 24.5 24.4 24.4
195 24.4 24.4 24.3 24.3 24.3 24.3 24.2 24.2 24.2 24.2
196 24.1 24.1 24.1 24.1 24.0 24.0 24.0 24.0 23.9 23.9
197 23.9 23.9 23.8 23.8 23.8 23.8 23.7 23.7 23.7 23.7
198 23.6 23.6 23.6 23.6 23.6 23.5 23.5 23.5 23.5 23.4
199 23.4 23.4 23.4 23.3 23.3 23.3 23.3 23.2 23.2 23.2
200 23.2 23.2 23.1 23.1 23.1 23.1 23.0 23.0 23.0 23.0
201 22.9 22.9 22.9 22.9 22.9 22.8 22.8 22.8 22.8 22.7
17

Load 1000gf (1kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
35 1513 1505 1496 1488 1479 1471 1463 1455 1447 1439
36 1431 1423 1415 1407 1399 1392 1384 1377 1369 1362
37 1354 1347 1340 1333 1325 1318 1311 1304 1298 1291
38 1284 1277 1271 1264 1257 1251 1244 1238 1232 1225
39 1219 1213 1207 1200 1194 1188 1182 1176 1170 1165
40 1159 1153 1147 1142 1136 1130 1125 1119 1114 1108
41 1103 1098 1092 1087 1082 1076 1071 1066 1061 1056
42 1051 1046 1041 1036 1031 1026 1022 1017 1012 1007
43 1003 998 993 989 984 980 975 971 966 962
44 958 953 949 945 940 936 932 928 924 920
45 916 911 907 903 899 896 892 888 884 880
46 876 872 869 865 861 857 854 850 846 843
47 839 836 832 829 825 822 818 815 811 808
48 805 801 798 795 791 788 785 782 779 775
49 772 769 766 763 760 757 754 751 748 745
50 742 739 736 733 730 727 724 721 718 716
51 713 710 707 704 702 699 696 694 691 688
52 686 683 680 678 675 673 670 668 665 663
53 660 658 655 653 650 648 645 643 641 638
54 636 633 631 629 626 624 622 620 617 615
55 613 611 608 606 604 602 600 598 595 593
56 591 589 587 585 583 581 579 577 575 573
57 571 569 567 565 563 561 559 557 555 553
58 551 549 547 545 544 542 540 538 536 534
59 533 531 529 527 525 524 522 520 518 517
60 515 513 512 510 508 507 505 503 502 500
61 498 497 495 493 492 490 489 487 485 484
62 482 481 479 478 476 475 473 472 470 469
63 467 466 464 463 461 460 458 457 455 454
64 453 451 450 448 447 446 444 443 442 440
65 439 437 436 435 433 432 431 430 428 427
66 426 424 423 422 421 419 418 417 415 414
67 413 412 411 409 408 407 406 405 403 402
68 401 400 399 397 396 395 394 393 392 391
69 389 388 387 386 385 384 383 382 381 379
70 378 377 376 375 374 373 372 371 370 369
71 368 367 366 365 364 363 362 361 360 359
72 358 357 356 355 354 353 352 351 350 349
73 348 347 346 345 344 343 342 341 340 339
74 339 338 337 336 335 334 333 332 331 330
75 330 329 328 327 326 325 324 324 323 322
76 321 320 319 318 318 317 316 315 314 314
77 313 312 311 310 309 309 308 307 306 306
78 305 304 303 302 302 301 300 299 299 298
79 297 296 296 295 294 293 293 292 291 290
18

Load 1000gf (1kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
80 290 289 288 288 287 286 285 285 284 283
81 283 282 281 280 280 279 278 278 277 276
82 276 275 274 274 273 272 272 271 270 270
83 269 268 268 267 267 266 265 265 264 263
84 263 262 262 261 260 260 259 258 258 257
85 257 256 255 255 254 254 253 252 252 251
86 251 250 250 249 248 248 247 247 246 246
87 245 244 244 243 243 242 242 241 241 240
88 239 239 238 238 237 237 236 236 235 235
89 234 234 233 232 232 231 231 230 230 229
90 229 228 228 227 227 226 226 225 225 224
91 224 223 223 222 222 221 221 220 220 220
92 219 219 218 218 217 217 216 216 215 215
93 214 214 213 213 213 212 212 211 211 210
94 210 209 209 208 208 208 207 207 206 206
95 205 205 205 204 204 203 203 202 202 202
96 201 201 200 200 200 199 199 198 198 197
97 197 197 196 196 195 195 195 194 194 193
98 193 193 192 192 191 191 191 190 190 190
99 189 189 188 188 188 187 187 187 186 186
100 185 185 185 184 184 184 183 183 182 182
101 182 181 181 181 180 180 180 179 179 179
102 178 178 178 177 177 176 176 176 175 175
103 175 174 174 174 173 173 173 172 172 172
104 171 171 171 170 170 170 169 169 169 168
105 168 168 168 167 167 167 166 166 166 165
106 165 165 164 164 164 163 163 163 163 162
107 162 162 161 161 161 160 160 160 160 159
108 159 159 158 158 158 157 157 157 157 156
109 156 156 155 155 155 155 154 154 154 154
110 153 153 153 152 152 152 152 151 151 151
111 150 150 150 150 149 149 149 149 148 148
112 148 148 147 147 147 146 146 146 146 145
113 145 145 145 144 144 144 144 143 143 143
114 143 142 142 142 142 141 141 141 141 140
115 140 140 140 139 139 139 139 138 138 138
116 138 138 137 137 137 137 136 136 136 136
117 135 135 135 135 135 134 134 134 134 133
118 133 133 133 132 132 132 132 132 131 131
119 131 131 130 130 130 130 130 129 129 129
120 129 129 128 128 128 128 127 127 127 127
121 127 126 126 126 126 126 125 125 125 125
122 125 124 124 124 124 124 123 123 123 123
123 123 122 122 122 122 122 121 121 121 121
124 121 120 120 120 120 120 119 119 119 119
19

Load 1000gf (1kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
125 119 118 118 118 118 118 118 117 117 117
126 117 117 116 116 116 116 116 115 115 115
127 115 115 115 114 114 114 114 114 114 113
128 113 113 113 113 112 112 112 112 112 112
129 111 111 111 111 111 111 110 110 110 110
130 110 110 109 109 109 109 109 109 108 108
131 108 108 108 108 107 107 107 107 107 107
132 106 106 106 106 106 106 105 105 105 105
133 105 105 104 104 104 104 104 104 104 103
134 103 103 103 103 103 102 102 102 102 102
135 102 102 101 101 101 101 101 101 101 100
136 100 100 99.9 99.8 99.7 99.5 99.4 99.2 99.1 98.9
137 98.8 98.6 98.5 98.3 98.2 98.1 97.9 97.8 97.6 97.5
138 97.4 97.2 97.1 96.9 96.8 96.7 96.5 96.4 96.2 96.1
139 96.0 95.8 95.7 95.5 95.4 95.3 95.1 95.0 94.9 94.7
140 94.6 94.5 94.3 94.2 94.1 93.9 93.8 93.7 93.5 93.4
141 93.3 93.1 93.0 92.9 92.7 92.6 92.5 92.3 92.2 92.1
142 91.9 91.8 91.7 91.6 91.4 91.3 91.2 91.0 90.9 90.8
143 90.7 90.5 90.4 90.3 90.2 90.0 89.9 89.8 89.7 89.5
144 89.4 89.3 89.2 89.0 88.9 88.8 88.7 88.5 88.4 88.3
145 88.2 88.1 87.9 87.8 87.7 87.6 87.5 87.3 87.2 87.1
146 87.0 86.9 86.7 86.6 86.5 86.4 86.3 86.1 86.0 85.9
147 85.8 85.7 85.6 85.4 85.3 85.2 85.1 85.0 84.9 84.8
148 84.6 84.5 84.4 84.3 84.2 84.1 84.0 83.8 83.7 83.6
149 83.5 83.4 83.3 83.2 83.1 83.0 82.8 82.7 82.6 82.5
150 82.4 82.3 82.2 82.1 82.0 81.9 81.7 81.6 81.5 81.4
151 81.3 81.2 81.1 81.0 80.9 80.8 80.7 80.6 80.5 80.4
152 80.2 80.1 80.0 79.9 79.8 79.7 79.6 79.5 79.4 79.3
153 79.2 79.1 79.0 78.9 78.8 78.7 78.6 78.5 78.4 78.3
154 78.2 78.1 78.0 77.9 77.8 77.7 77.6 77.5 77.4 77.3
155 77.2 77.1 77.0 76.9 76.8 76.7 76.6 76.5 76.4 76.3
156 76.2 76.1 76.0 75.9 75.8 75.7 75.6 75.5 75.4 75.3
157 75.2 75.1 75.0 74.9 74.8 74.7 74.6 74.5 74.5 74.4
158 74.3 74.2 74.1 74.0 73.9 73.8 73.7 73.6 73.5 73.4
159 73.3 73.2 73.2 73.1 73.0 72.9 72.8 72.7 72.6 72.5
160 72.4 72.3 72.2 72.2 72.1 72.0 71.9 71.8 71.7 71.6
161 71.5 71.4 71.3 71.3 71.2 71.1 71.0 70.9 70.8 70.7
162 70.6 70.6 70.5 70.4 70.3 70.2 70.1 70.0 70.0 69.9
163 69.8 69.7 69.6 69.5 69.4 69.4 69.3 69.2 69.1 69.0
164 68.9 68.8 68.8 68.7 68.6 68.5 68.4 68.3 68.3 68.2
165 68.1 68.0 67.9 67.9 67.8 67.7 67.6 67.5 67.4 67.4
166 67.3 67.2 67.1 67.0 67.0 66.9 66.8 66.7 66.6 66.6
167 66.5 66.4 66.3 66.2 66.2 66.1 66.0 65.9 65.8 65.8
168 65.7 65.6 65.5 65.5 65.4 65.3 65.2 65.1 65.1 65.0
169 64.9 64.8 64.8 64.7 64.6 64.5 64.5 64.4 64.3 64.2
20

Load 1000gf (1kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
170 64.2 64.1 64.0 63.9 63.9 63.8 63.7 63.6 63.6 63.5
171 63.4 63.3 63.3 63.2 63.1 63.0 63.0 62.9 62.8 62.7
172 62.7 62.6 62.5 62.5 62.4 62.3 62.2 62.2 62.1 62.0
173 61.9 61.9 61.8 61.7 61.7 61.6 61.5 61.4 61.4 61.3
174 61.2 61.2 61.1 61.0 61.0 60.9 60.8 60.7 60.7 60.6
175 60.5 60.5 60.4 60.3 60.3 60.2 60.1 60.1 60.0 59.9
176 59.9 59.8 59.7 59.6 59.6 59.5 59.4 59.4 59.3 59.2
177 59.2 59.1 59.0 59.0 58.9 58.8 58.8 58.7 58.6 58.6
178 58.5 58.4 58.4 58.3 58.3 58.2 58.1 58.1 58.0 57.9
179 57.9 57.8 57.7 57.7 57.6 57.5 57.5 57.4 57.3 57.3
180 57.2 57.2 57.1 57.0 57.0 56.9 56.8 56.8 56.7 56.7
181 56.6 56.5 56.5 56.4 56.3 56.3 56.2 56.2 56.1 56.0
182 56.0 55.9 55.8 55.8 55.7 55.7 55.6 55.5 55.5 55.4
183 55.4 55.3 55.2 55.2 55.1 55.1 55.0 54.9 54.9 54.8
184 54.8 54.7 54.6 54.6 54.5 54.5 54.4 54.3 54.3 54.2
185 54.2 54.1 54.1 54.0 53.9 53.9 53.8 53.8 53.7 53.6
186 53.6 53.5 53.5 53.4 53.4 53.3 53.2 53.2 53.1 53.1
187 53.0 53.0 52.9 52.8 52.8 52.7 52.7 52.6 52.6 52.5
188 52.5 52.4 52.3 52.3 52.2 52.2 52.1 52.1 52.0 52.0
189 51.9 51.8 51.8 51.7 51.7 51.6 51.6 51.5 51.5 51.4
190 51.4 51.3 51.2 51.2 51.1 51.1 51.0 51.0 50.9 50.9
191 50.8 50.8 50.7 50.7 50.6 50.6 50.5 50.5 50.4 50.3
192 50.3 50.2 50.2 50.1 50.1 50.0 50.0 49.9 49.9 49.8
193 49.8 49.7 49.7 49.6 49.6 49.5 49.5 49.4 49.4 49.3
194 49.3 49.2 49.2 49.1 49.1 49.0 49.0 48.9 48.9 48.8
195 48.8 48.7 48.7 48.6 48.6 48.5 48.5 48.4 48.4 48.3
196 48.3 48.2 48.2 48.1 48.1 48.0 48.0 47.9 47.9 47.8
197 47.8 47.7 47.7 47.6 47.6 47.5 47.5 47.4 47.4 47.3
198 47.3 47.2 47.2 47.1 47.1 47.1 47.0 47.0 46.9 46.9
199 46.8 46.8 46.7 46.7 46.6 46.6 46.5 46.5 46.4 46.4
200 46.4 46.3 46.3 46.2 46.2 46.1 46.1 46.0 46.0 45.9
201 45.9 45.8 45.8 45.8 45.7 45.7 45.6 45.6 45.5 45.5
202 45.4 45.4 45.3 45.3 45.3 45.2 45.2 45.1 45.1 45.0
203 45.0 44.9 44.9 44.9 44.8 44.8 44.7 44.7 44.6 44.6
204 44.6 44.5 44.5 44.4 44.4 44.3 44.3 44.2 44.2 44.2
205 44.1 44.1 44.0 44.0 43.9 43.9 43.9 43.8 43.8 43.7
206 43.7 43.6 43.6 43.6 43.5 43.5 43.4 43.4 43.4 43.3
207 43.3 43.2 43.2 43.1 43.1 43.1 43.0 43.0 42.9 42.9
208 42.9 42.8 42.8 42.7 42.7 42.6 42.6 42.6 42.5 42.5
209 42.4 42.4 42.4 42.3 42.3 42.2 42.2 42.2 42.1 42.1
210 42.0 42.0 42.0 41.9 41.9 41.8 41.8 41.8 41.7 41.7
211 41.6 41.6 41.6 41.5 41.5 41.4 41.4 41.4 41.3 41.3
212 41.3 41.2 41.2 41.1 41.1 41.1 41.0 41.0 40.9 40.9
213 40.9 40.8 40.8 40.8 40.7 40.7 40.6 40.6 40.6 40.5
214 40.5 40.4 40.4 40.4 40.3 40.3 40.3 40.2 40.2 40.1
21

Load 1000gf (1kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
215 40.1 40.1 40.0 40.0 40.0 39.9 39.9 39.8 39.8 39.8
216 39.7 39.7 39.7 39.6 39.6 39.6 39.5 39.5 39.4 39.4
217 39.4 39.3 39.3 39.3 39.2 39.2 39.2 39.1 39.1 39.0
218 39.0 39.0 38.9 38.9 38.9 38.8 38.8 38.8 38.7 38.7
219 38.7 38.6 38.6 38.6 38.5 38.5 38.4 38.4 38.4 38.3
220 38.3 38.3 38.2 38.2 38.2 38.1 38.1 38.1 38.0 38.0
221 38.0 37.9 37.9 37.9 37.8 37.8 37.8 37.7 37.7 37.7
222 37.6 37.6 37.6 37.5 37.5 37.4 37.4 37.4 37.3 37.3
223 37.3 37.2 37.2 37.2 37.1 37.1 37.1 37.0 37.0 37.0
224 36.9 36.9 36.9 36.9 36.8 36.8 36.8 36.7 36.7 36.7
225 36.6 36.6 36.6 36.5 36.5 36.5 36.4 36.4 36.4 36.3
226 36.3 36.3 36.2 36.2 36.2 36.1 36.1 36.1 36.0 36.0
227 36.0 35.9 35.9 35.9 35.9 35.8 35.8 35.8 35.7 35.7
228 35.7 35.6 35.6 35.6 35.5 35.5 35.5 35.4 35.4 35.4
229 35.4 35.3 35.3 35.3 35.2 35.2 35.2 35.1 35.1 35.1
230 35.0 35.0 35.0 35.0 34.9 34.9 34.9 34.8 34.8 34.8
231 34.7 34.7 34.7 34.7 34.6 34.6 34.6 34.5 34.5 34.5
232 34.4 34.4 34.4 34.4 34.3 34.3 34.3 34.2 34.2 34.2
233 34.2 34.1 34.1 34.1 34.0 34.0 34.0 33.9 33.9 33.9
234 33.9 33.8 33.8 33.8 33.7 33.7 33.7 33.7 33.6 33.6
235 33.6 33.5 33.5 33.5 33.5 33.4 33.4 33.4 33.3 33.3
236 33.3 33.3 33.2 33.2 33.2 33.1 33.1 33.1 33.1 33.0
237 33.0 33.0 33.0 32.9 32.9 32.9 32.8 32.8 32.8 32.8
238 32.7 32.7 32.7 32.6 32.6 32.6 32.6 32.5 32.5 32.5
239 32.5 32.4 32.4 32.4 32.3 32.3 32.3 32.3 32.2 32.2
240 32.2 32.2 32.1 32.1 32.1 32.1 32.0 32.0 32.0 31.9
241 31.9 31.9 31.9 31.8 31.8 31.8 31.8 31.7 31.7 31.7
242 31.7 31.6 31.6 31.6 31.6 31.5 31.5 31.5 31.4 31.4
243 31.4 31.4 31.3 31.3 31.3 31.3 31.2 31.2 31.2 31.2
244 31.1 31.1 31.1 31.1 31.0 31.0 31.0 31.0 30.9 30.9
245 30.9 30.9 30.8 30.8 30.8 30.8 30.7 30.7 30.7 30.7
246 30.6 30.6 30.6 30.6 30.5 30.5 30.5 30.5 30.4 30.4
247 30.4 30.4 30.3 30.3 30.3 30.3 30.2 30.2 30.2 30.2
248 30.1 30.1 30.1 30.1 30.0 30.0 30.0 30.0 30.0 29.9
249 29.9 29.9 29.9 29.8 29.8 29.8 29.8 29.7 29.7 29.7
250 29.7 29.6 29.6 29.6 29.6 29.5 29.5 29.5 29.5 29.5
251 29.4 29.4 29.4 29.4 29.3 29.3 29.3 29.3 29.2 29.2
252 29.2 29.2 29.1 29.1 29.1 29.1 29.1 29.0 29.0 29.0
253 29.0 28.9 28.9 28.9 28.9 28.9 28.8 28.8 28.8 28.8
254 28.7 28.7 28.7 28.7 28.6 28.6 28.6 28.6 28.6 28.5
255 28.5 28.5 28.5 28.4 28.4 28.4 28.4 28.4 28.3 28.3
256 28.3 28.3 28.2 28.2 28.2 28.2 28.2 28.1 28.1 28.1
257 28.1 28.0 28.0 28.0 28.0 28.0 27.9 27.9 27.9 27.9
258 27.9 27.8 27.8 27.8 27.8 27.7 27.7 27.7 27.7 27.7
259 27.6 27.6 27.6 27.6 27.6 27.5 27.5 27.5 27.5 27.4
22

Load 2000gf (2kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
49 1544 1538 1532 1526 1519 1513 1507 1501 1495 1489
50 1483 1477 1471 1466 1460 1454 1448 1443 1437 1431
51 1426 1420 1414 1409 1404 1398 1393 1387 1382 1377
52 1371 1366 1361 1356 1350 1345 1340 1335 1330 1325
53 1320 1315 1310 1305 1300 1295 1291 1286 1281 1276
54 1272 1267 1262 1258 1253 1248 1244 1239 1235 1230
55 1226 1221 1217 1213 1208 1204 1199 1195 1191 1187
56 1182 1178 1174 1170 1166 1162 1157 1153 1149 1145
57 1141 1137 1133 1129 1125 1122 1118 1114 1110 1106
58 1102 1098 1095 1091 1087 1083 1080 1076 1072 1069
59 1065 1062 1058 1054 1051 1047 1044 1040 1037 1033
60 1030 1027 1023 1020 1016 1013 1010 1006 1003 1000
61 997 993 990 987 984 980 977 974 971 968
62 965 962 958 955 952 949 946 943 940 937
63 934 931 928 925 922 920 917 914 911 908
64 905 902 900 897 894 891 889 886 883 880
65 878 875 872 870 867 864 862 859 856 854
66 851 849 846 844 841 838 836 833 831 828
67 826 824 821 819 816 814 811 809 807 804
68 802 800 797 795 793 790 788 786 783 781
69 779 777 774 772 770 768 765 763 761 759
70 757 755 752 750 748 746 744 742 740 738
71 736 734 731 729 727 725 723 721 719 717
72 715 713 711 709 707 705 704 702 700 698
73 696 694 692 690 688 686 685 683 681 679
74 677 675 673 672 670 668 666 665 663 661
75 659 657 656 654 652 650 649 647 645 644
76 642 640 639 637 635 634 632 630 629 627
77 625 624 622 621 619 617 616 614 613 611
78 609 608 606 605 603 602 600 599 597 596
79 594 593 591 590 588 587 585 584 582 581
80 579 578 576 575 574 572 571 569 568 567
81 565 564 562 561 560 558 557 556 554 553
82 551 550 549 547 546 545 543 542 541 540
83 538 537 536 534 533 532 531 529 528 527
84 526 524 523 522 521 519 518 517 516 514
85 513 512 511 510 508 507 506 505 504 503
86 501 500 499 498 497 496 494 493 492 491
87 490 489 488 487 485 484 483 482 481 480
88 479 478 477 476 474 473 472 471 470 469
89 468 467 466 465 464 463 462 461 460 459
90 458 457 456 455 454 453 452 451 450 449
91 448 447 446 445 444 443 442 441 440 439
92 438 437 436 435 434 433 432 431 431 430
93 429 428 427 426 425 424 423 422 421 421
23

Load 2000gf (2kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
94 420 419 418 417 416 415 414 413 413 412
95 411 410 409 408 407 407 406 405 404 403
96 402 402 401 400 399 398 397 397 396 395
97 394 393 392 392 391 390 389 388 388 387
98 386 385 385 384 383 382 381 381 380 379
99 378 378 377 376 375 375 374 373 372 372
100 371 370 369 369 368 367 366 366 365 364
101 363 363 362 361 361 360 359 359 358 357
102 356 356 355 354 354 353 352 352 351 350
103 350 349 348 347 347 346 345 345 344 343
104 343 342 342 341 340 340 339 338 338 337
105 336 336 335 334 334 333 333 332 331 331
106 330 329 329 328 328 327 326 326 325 324
107 324 323 323 322 321 321 320 320 319 318
108 318 317 317 316 316 315 314 314 313 313
109 312 312 311 310 310 309 309 308 308 307
110 306 306 305 305 304 304 303 303 302 301
111 301 300 300 299 299 298 298 297 297 296
112 296 295 295 294 293 293 292 292 291 291
113 290 290 289 289 288 288 287 287 286 286
114 285 285 284 284 283 283 282 282 281 281
115 280 280 279 279 278 278 277 277 277 276
116 276 275 275 274 274 273 273 272 272 271
117 271 270 270 269 269 269 268 268 267 267
118 266 266 265 265 265 264 264 263 263 262
119 262 261 261 261 260 260 259 259 258 258
120 258 257 257 256 256 255 255 255 254 254
121 253 253 252 252 252 251 251 250 250 250
122 249 249 248 248 248 247 247 246 246 245
123 245 245 244 244 244 243 243 242 242 242
124 241 241 240 240 240 239 239 238 238 238
125 237 237 237 236 236 235 235 235 234 234
126 234 233 233 232 232 232 231 231 231 230
127 230 230 229 229 228 228 228 227 227 227
128 226 226 226 225 225 225 224 224 224 223
129 223 222 222 222 221 221 221 220 220 220
130 219 219 219 218 218 218 217 217 217 216
131 216 216 215 215 215 214 214 214 213 213
132 213 212 212 212 212 211 211 211 210 210
133 210 209 209 209 208 208 208 207 207 207
134 207 206 206 206 205 205 205 204 204 204
135 203 203 203 203 202 202 202 201 201 201
136 200 200 200 200 199 199 199 198 198 198
137 198 197 197 197 196 196 196 196 195 195
138 195 194 194 194 194 193 193 193 192 192
24

Load 2000gf (2kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
139 192 192 191 191 191 191 190 190 190 189
140 189 189 189 188 188 188 188 187 187 187
141 187 186 186 186 185 185 185 185 184 184
142 184 184 183 183 183 183 182 182 182 182
143 181 181 181 181 180 180 180 180 179 179
144 179 179 178 178 178 178 177 177 177 177
145 176 176 176 176 175 175 175 175 174 174
146 174 174 173 173 173 173 173 172 172 172
147 172 171 171 171 171 170 170 170 170 170
148 169 169 169 169 168 168 168 168 167 167
149 167 167 167 166 166 166 166 165 165 165
150 165 165 164 164 164 164 163 163 163 163
151 163 162 162 162 162 162 161 161 161 161
152 160 160 160 160 160 159 159 159 159 159
153 158 158 158 158 158 157 157 157 157 157
154 156 156 156 156 156 155 155 155 155 155
155 154 154 154 154 154 153 153 153 153 153
156 152 152 152 152 152 151 151 151 151 151
157 150 150 150 150 150 149 149 149 149 149
158 149 148 148 148 148 148 147 147 147 147
159 147 146 146 146 146 146 146 145 145 145
160 145 145 144 144 144 144 144 144 143 143
161 143 143 143 143 142 142 142 142 142 141
162 141 141 141 141 141 140 140 140 140 140
163 140 139 139 139 139 139 139 138 138 138
164 138 138 138 137 137 137 137 137 137 136
165 136 136 136 136 136 135 135 135 135 135
166 135 134 134 134 134 134 134 133 133 133
167 133 133 133 132 132 132 132 132 132 132
168 131 131 131 131 131 131 130 130 130 130
169 130 130 130 129 129 129 129 129 129 128
170 128 128 128 128 128 128 127 127 127 127
171 127 127 127 126 126 126 126 126 126 125
172 125 125 125 125 125 125 124 124 124 124
173 124 124 124 123 123 123 123 123 123 123
174 122 122 122 122 122 122 122 121 121 121
175 121 121 121 121 121 120 120 120 120 120
176 120 120 119 119 119 119 119 119 119 118
177 118 118 118 118 118 118 118 117 117 117
178 117 117 117 117 117 116 116 116 116 116
179 116 116 115 115 115 115 115 115 115 115
180 114 114 114 114 114 114 114 114 113 113
181 113 113 113 113 113 113 112 112 112 112
182 112 112 112 112 111 111 111 111 111 111
183 111 111 110 110 110 110 110 110 110 110
25

Load 2000gf (2kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
184 110 109 109 109 109 109 109 109 109 108
185 108 108 108 108 108 108 108 108 107 107
186 107 107 107 107 107 107 106 106 106 106
187 106 106 106 106 106 105 105 105 105 105
188 105 105 105 105 104 104 104 104 104 104
189 104 104 104 103 103 103 103 103 103 103
190 103 103 102 102 102 102 102 102 102 102
191 102 102 101 101 101 101 101 101 101 101
192 101 100 100 100 100 100 100 99.9 99.8 99.6
193 99.5 99.4 99.3 99.2 99.1 99.0 98.9 98.8 98.7 98.6
194 98.5 98.4 98.3 98.2 98.1 98.0 97.9 97.8 97.7 97.6
195 97.5 97.4 97.3 97.2 97.1 97.0 96.9 96.8 96.7 96.6
196 96.5 96.4 96.3 96.2 96.1 96.0 95.9 95.8 95.7 95.6
197 95.5 95.4 95.4 95.3 95.2 95.1 95.0 94.9 94.8 94.7
198 94.6 94.5 94.4 94.3 94.2 94.1 94.0 93.9 93.8 93.7
199 93.6 93.5 93.4 93.4 93.3 93.2 93.1 93.0 92.9 92.8
200 92.7 92.6 92.5 92.4 92.3 92.2 92.1 92.1 92.0 91.9
201 91.8 91.7 91.6 91.5 91.4 91.3 91.2 91.1 91.1 91.0
202 90.9 90.8 90.7 90.6 90.5 90.4 90.3 90.2 90.2 90.1
203 90.0 89.9 89.8 89.7 89.6 89.5 89.5 89.4 89.3 89.2
204 89.1 89.0 88.9 88.8 88.8 88.7 88.6 88.5 88.4 88.3
205 88.2 88.1 88.1 88.0 87.9 87.8 87.7 87.6 87.5 87.5
206 87.4 87.3 87.2 87.1 87.0 87.0 86.9 86.8 86.7 86.6
207 86.5 86.5 86.4 86.3 86.2 86.1 86.0 86.0 85.9 85.8
208 85.7 85.6 85.5 85.5 85.4 85.3 85.2 85.1 85.1 85.0
209 84.9 84.8 84.7 84.6 84.6 84.5 84.4 84.3 84.2 84.2
210 84.1 84.0 83.9 83.8 83.8 83.7 83.6 83.5 83.4 83.4
211 83.3 83.2 83.1 83.1 83.0 82.9 82.8 82.7 82.7 82.6
212 82.5 82.4 82.3 82.3 82.2 82.1 82.0 82.0 81.9 81.8
213 81.7 81.7 81.6 81.5 81.4 81.3 81.3 81.2 81.1 81.0
214 81.0 80.9 80.8 80.7 80.7 80.6 80.5 80.4 80.4 80.3
215 80.2 80.1 80.1 80.0 79.9 79.8 79.8 79.7 79.6 79.5
216 79.5 79.4 79.3 79.3 79.2 79.1 79.0 79.0 78.9 78.8
217 78.7 78.7 78.6 78.5 78.5 78.4 78.3 78.2 78.2 78.1
218 78.0 78.0 77.9 77.8 77.7 77.7 77.6 77.5 77.5 77.4
219 77.3 77.2 77.2 77.1 77.0 77.0 76.9 76.8 76.8 76.7
220 76.6 76.5 76.5 76.4 76.3 76.3 76.2 76.1 76.1 76.0
221 75.9 75.9 75.8 75.7 75.6 75.6 75.5 75.4 75.4 75.3
222 75.2 75.2 75.1 75.0 75.0 74.9 74.8 74.8 74.7 74.6
223 74.6 74.5 74.4 74.4 74.3 74.2 74.2 74.1 74.0 74.0
224 73.9 73.8 73.8 73.7 73.6 73.6 73.5 73.4 73.4 73.3
225 73.2 73.2 73.1 73.0 73.0 72.9 72.9 72.8 72.7 72.7
226 72.6 72.5 72.5 72.4 72.3 72.3 72.2 72.2 72.1 72.0
227 72.0 71.9 71.8 71.8 71.7 71.6 71.6 71.5 71.5 71.4
228 71.3 71.3 71.2 71.1 71.1 71.0 71.0 70.9 70.8 70.8
26

Load 2000gf (2kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
229 70.7 70.6 70.6 70.5 70.5 70.4 70.3 70.3 70.2 70.2
230 70.1 70.0 70.0 69.9 69.9 69.8 69.7 69.7 69.6 69.5
231 69.5 69.4 69.4 69.3 69.2 69.2 69.1 69.1 69.0 69.0
232 68.9 68.8 68.8 68.7 68.7 68.6 68.5 68.5 68.4 68.4
233 68.3 68.2 68.2 68.1 68.1 68.0 68.0 67.9 67.8 67.8
234 67.7 67.7 67.6 67.5 67.5 67.4 67.4 67.3 67.3 67.2
235 67.1 67.1 67.0 67.0 66.9 66.9 66.8 66.7 66.7 66.6
236 66.6 66.5 66.5 66.4 66.4 66.3 66.2 66.2 66.1 66.1
237 66.0 66.0 65.9 65.8 65.8 65.7 65.7 65.6 65.6 65.5
238 65.5 65.4 65.4 65.3 65.2 65.2 65.1 65.1 65.0 65.0
239 64.9 64.9 64.8 64.8 64.7 64.6 64.6 64.5 64.5 64.4
240 64.4 64.3 64.3 64.2 64.2 64.1 64.1 64.0 63.9 63.9
241 63.8 63.8 63.7 63.7 63.6 63.6 63.5 63.5 63.4 63.4
242 63.3 63.3 63.2 63.2 63.1 63.1 63.0 63.0 62.9 62.8
243 62.8 62.7 62.7 62.6 62.6 62.5 62.5 62.4 62.4 62.3
244 62.3 62.2 62.2 62.1 62.1 62.0 62.0 61.9 61.9 61.8
245 61.8 61.7 61.7 61.6 61.6 61.5 61.5 61.4 61.4 61.3
246 61.3 61.2 61.2 61.1 61.1 61.0 61.0 60.9 60.9 60.8
247 60.8 60.7 60.7 60.6 60.6 60.5 60.5 60.4 60.4 60.3
248 60.3 60.2 60.2 60.1 60.1 60.0 60.0 59.9 59.9 59.9
249 59.8 59.8 59.7 59.7 59.6 59.6 59.5 59.5 59.4 59.4
250 59.3 59.3 59.2 59.2 59.1 59.1 59.0 59.0 59.0 58.9
251 58.9 58.8 58.8 58.7 58.7 58.6 58.6 58.5 58.5 58.4
252 58.4 58.3 58.3 58.3 58.2 58.2 58.1 58.1 58.0 58.0
253 57.9 57.9 57.8 57.8 57.7 57.7 57.7 57.6 57.6 57.5
254 57.5 57.4 57.4 57.3 57.3 57.2 57.2 57.2 57.1 57.1
255 57.0 57.0 56.9 56.9 56.8 56.8 56.8 56.7 56.7 56.6
256 56.6 56.5 56.5 56.4 56.4 56.4 56.3 56.3 56.2 56.2
257 56.1 56.1 56.1 56.0 56.0 55.9 55.9 55.8 55.8 55.7
258 55.7 55.7 55.6 55.6 55.5 55.5 55.4 55.4 55.4 55.3
259 55.3 55.2 55.2 55.1 55.1 55.1 55.0 55.0 54.9 54.9
260 54.9 54.8 54.8 54.7 54.7 54.6 54.6 54.6 54.5 54.5
261 54.4 54.4 54.3 54.3 54.3 54.2 54.2 54.1 54.1 54.1
262 54.0 54.0 53.9 53.9 53.9 53.8 53.8 53.7 53.7 53.6
263 53.6 53.6 53.5 53.5 53.4 53.4 53.4 53.3 53.3 53.2
264 53.2 53.2 53.1 53.1 53.0 53.0 53.0 52.9 52.9 52.8
265 52.8 52.8 52.7 52.7 52.6 52.6 52.6 52.5 52.5 52.4
266 52.4 52.4 52.3 52.3 52.2 52.2 52.2 52.1 52.1 52.1
267 52.0 52.0 51.9 51.9 51.9 51.8 51.8 51.7 51.7 51.7
268 51.6 51.6 51.5 51.5 51.5 51.4 51.4 51.4 51.3 51.3
269 51.2 51.2 51.2 51.1 51.1 51.1 51.0 51.0 50.9 50.9
270 50.9 50.8 50.8 50.8 50.7 50.7 50.6 50.6 50.6 50.5
271 50.5 50.5 50.4 50.4 50.3 50.3 50.3 50.2 50.2 50.2
272 50.1 50.1 50.0 50.0 50.0 49.9 49.9 49.9 49.8 49.8
273 49.8 49.7 49.7 49.6 49.6 49.6 49.5 49.5 49.5 49.4
27

Load 2000gf (2kgf)
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
274 49.4 49.4 49.3 49.3 49.2 49.2 49.2 49.1 49.1 49.1
275 49.0 49.0 49.0 48.9 48.9 48.9 48.8 48.8 48.7 48.7
276 48.7 48.6 48.6 48.6 48.5 48.5 48.5 48.4 48.4 48.4
277 48.3 48.3 48.3 48.2 48.2 48.2 48.1 48.1 48.0 48.0
278 48.0 47.9 47.9 47.9 47.8 47.8 47.8 47.7 47.7 47.7
279 47.6 47.6 47.6 47.5 47.5 47.5 47.4 47.4 47.4 47.3
280 47.3 47.3 47.2 47.2 47.2 47.1 47.1 47.1 47.0 47.0
281 47.0 46.9 46.9 46.9 46.8 46.8 46.8 46.7 46.7 46.7
282 46.6 46.6 46.6 46.5 46.5 46.5 46.4 46.4 46.4 46.3
283 46.3 46.3 46.2 46.2 46.2 46.1 46.1 46.1 46.0 46.0
284 46.0 45.9 45.9 45.9 45.8 45.8 45.8 45.7 45.7 45.7
285 45.7 45.6 45.6 45.6 45.5 45.5 45.5 45.4 45.4 45.4
286 45.3 45.3 45.3 45.2 45.2 45.2 45.1 45.1 45.1 45.0
287 45.0 45.0 45.0 44.9 44.9 44.9 44.8 44.8 44.8 44.7
288 44.7 44.7 44.6 44.6 44.6 44.6 44.5 44.5 44.5 44.4
289 44.4 44.4 44.3 44.3 44.3 44.2 44.2 44.2 44.2 44.1
290 44.1 44.1 44.0 44.0 44.0 43.9 43.9 43.9 43.8 43.8
291 43.8 43.8 43.7 43.7 43.7 43.6 43.6 43.6 43.5 43.5
292 43.5 43.5 43.4 43.4 43.4 43.3 43.3 43.3 43.3 43.2
293 43.2 43.2 43.1 43.1 43.1 43.0 43.0 43.0 43.0 42.9
294 42.9 42.9 42.8 42.8 42.8 42.8 42.7 42.7 42.7 42.6
295 42.6 42.6 42.6 42.5 42.5 42.5 42.4 42.4 42.4 42.3
296 42.3 42.3 42.3 42.2 42.2 42.2 42.1 42.1 42.1 42.1
297 42.0 42.0 42.0 42.0 41.9 41.9 41.9 41.8 41.8 41.8
298 41.8 41.7 41.7 41.7 41.6 41.6 41.6 41.6 41.5 41.5
299 41.5 41.4 41.4 41.4 41.4 41.3 41.3 41.3 41.3 41.2
300 41.2 41.2 41.1 41.1 41.1 41.1 41.0 41.0 41.0 41.0
301 40.9 40.9 40.9 40.8 40.8 40.8 40.8 40.7 40.7 40.7
302 40.7 40.6 40.6 40.6 40.5 40.5 40.5 40.5 40.4 40.4
303 40.4 40.4 40.3 40.3 40.3 40.3 40.2 40.2 40.2 40.1
304 40.1 40.1 40.1 40.0 40.0 40.0 40.0 39.9 39.9 39.9
305 39.9 39.8 39.8 39.8 39.8 39.7 39.7 39.7 39.7 39.6
306 39.6 39.6 39.5 39.5 39.5 39.5 39.4 39.4 39.4 39.4
307 39.3 39.3 39.3 39.3 39.2 39.2 39.2 39.2 39.1 39.1
308 39.1 39.1 39.0 39.0 39.0 39.0 38.9 38.9 38.9 38.9
309 38.8 38.8 38.8 38.8 38.7 38.7 38.7 38.7 38.6 38.6
310 38.6 38.6 38.5 38.5 38.5 38.5 38.4 38.4 38.4 38.4
311 38.3 38.3 38.3 38.3 38.2 38.2 38.2 38.2 38.1 38.1
312 38.1 38.1 38.0 38.0 38.0 38.0 37.9 37.9 37.9 37.9
313 37.8 37.8 37.8 37.8 37.8 37.7 37.7 37.7 37.7 37.6
314 37.6 37.6 37.6 37.5 37.5 37.5 37.5 37.4 37.4 37.4
315 37.4 37.3 37.3 37.3 37.3 37.3 37.2 37.2 37.2 37.2
316 37.1 37.1 37.1 37.1 37.0 37.0 37.0 37.0 36.9 36.9
317 36.9 36.9 36.9 36.8 36.8 36.8 36.8 36.7 36.7 36.7
318 36.7 36.6 36.6 36.6 36.6 36.6 36.5 36.5 36.5 36.5
28

Load 5kgf
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
70 1892 1839 1788 1740 1693 1648 1605 1564 1524 1485
80 1448 1413 1379 1346 1314 1283 1253 1225 1197 1170
90 1144 1119 1095 1072 1049 1027 1006 985 965 946
100 927 909 891 874 857 841 825 810 795 780
110 766 752 739 726 713 701 689 677 666 655
120 644 633 623 613 603 593 584 575 566 557
130 549 540 532 524 516 509 501 494 487 480
140 473 466 460 453 447 441 435 429 423 418
150 412 407 401 396 391 386 381 376 371 367
160 362 358 353 349 345 340 336 332 328 325
170 321 317 313 310 306 303 299 296 293 289
180 286 283 280 277 274 271 268 265 262 260
190 257 254 251 249 246 244 241 239 236 234
200 232 229 227 225 223 221 218 216 214 212
210 210 208 206 204 202 201 199 197 195 193
220 192 190 188 186 185 183 181 180 178 177
230 175 174 172 171 169 168 166 165 164 162
240 161 160 158 157 156 154 153 152 151 150
250 148 147 146 145 144 143 141 140 139 138
260 137 136 135 134 133 132 131 130 129 128
270 127 126 125 124 123 123 122 121 120 119
280 118 117 117 116 115 114 113 113 112 111
290 110 109 109 108 107 107 106 105 104 104
300 103 102 102 101 100 99.7 99.0 98.4 97.7 97.1
310 96.5 95.8 95.2 94.6 94.0 93.4 92.8 92.2 91.7 91.1
320 90.5 90.0 89.4 88.9 88.3 87.8 87.2 86.7 86.2 85.6
330 85.1 84.6 84.1 83.6 83.1 82.6 82.1 81.6 81.1 80.7
340 80.2 79.7 79.3 78.8 78.3 77.9 77.4 77.0 76.5 76.1
350 75.7 75.2 74.8 74.4 74.0 73.6 73.1 72.7 72.3 71.9
360 71.5 71.1 70.7 70.4 70.0 69.6 69.2 68.8 68.5 68.1
370 67.7 67.3 67.0 66.6 66.3 65.9 65.6 65.2 64.9 64.5
380 64.2 63.9 63.5 63.2 62.9 62.5 62.2 61.9 61.6 61.3
390 60.9 60.6 60.3 60.0 59.7 59.4 59.1 58.8 58.5 58.2
400 57.9 57.6 57.4 57.1 56.8 56.5 56.2 56.0 55.7 55.4
410 55.1 54.9 54.6 54.3 54.1 53.8 53.6 53.3 53.1 52.8
420 52.6 52.3 52.1 51.8 51.6 51.3 51.1 50.8 50.6 50.4
430 50.1 49.9 49.7 49.4 49.2 49.0 48.8 48.5 48.3 48.1
440 47.9 47.7 47.4 47.2 47.0 46.8 46.6 46.4 46.2 46.0
450 45.8 45.6 45.4 45.2 45.0 44.8 44.6 44.4 44.2 44.0
460 43.8 43.6 43.4 43.2 43.1 42.9 42.7 42.5 42.3 42.1
470 42.0 41.8 41.6 41.4 41.3 41.1 40.9 40.7 40.6 40.4
480 40.2 40.1 39.9 39.7 39.6 39.4 39.2 39.1 38.9 38.8
490 38.6 38.5 38.3 38.1 38.0 37.8 37.7 37.5 37.4 37.2
500 37.1 36.9 36.8 36.6 36.5 36.3 36.2 36.1 35.9 35.8
510 35.6 35.5 35.4 35.2 35.1 35.0 34.8 34.7 34.5 34.4
29

Load 5kgf
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
520 34.3 34.2 34.0 33.9 33.8 33.6 33.5 33.4 33.3 33.1
530 33.0 32.9 32.8 32.6 32.5 32.4 32.3 32.1 32.0 31.9
540 31.8 31.7 31.6 31.4 31.3 31.2 31.1 31.0 30.9 30.8
550 30.6 30.5 30.4 30.3 30.2 30.1 30.0 29.9 29.8 29.7
560 29.6 29.5 29.3 29.2 29.1 29.0 28.9 28.8 28.7 28.6
570 28.5 28.4 28.3 28.2 28.1 28.0 27.9 27.8 27.7 27.7
580 27.6 27.5 27.4 27.3 27.2 27.1 27.0 26.9 26.8 26.7
590 26.6 26.5 26.5 26.4 26.3 26.2 26.1 26.0 25.9 25.8
600 25.8 25.7 25.6 25.5 25.4 25.3 25.2 25.2 25.1 25.0
610 24.9 24.8 24.8 24.7 24.6 24.5 24.4 24.4 24.3 24.2
620 24.1 24.0 24.0 23.9 23.8 23.7 23.7 23.6 23.5 23.4
630 23.4 23.3 23.2 23.1 23.1 23.0 22.9 22.8 22.8 22.7
640 22.6 22.6 22.5 22.4 22.4 22.3 22.2 22.1 22.1 22.0
650 21.9 21.9 21.8 21.7 21.7 21.6 21.5 21.5 21.4 21.3
660 21.3 21.2 21.2 21.1 21.0 21.0 20.9 20.8 20.8 20.7
670 20.7 20.6 20.5 20.5 20.4 20.3 20.3 20.2 20.2 20.1
680 20.0 20.0 19.9 19.9 19.8 19.8 19.7 19.6 19.6 19.5
690 19.5 19.4 19.4 19.3 19.2 19.2 19.1 19.1 19.0 19.0
700 18.9 18.9 18.8 18.8 18.7 18.7 18.6 18.5 18.5 18.4
710 18.4 18.3 18.3 18.2 18.2 18.1 18.1 18.0 18.0 17.9
720 17.9 17.8 17.8 17.7 17.7 17.6 17.6 17.5 17.5 17.4
730 17.4 17.3 17.3 17.3 17.2 17.2 17.1 17.1 17.0 17.0
740 16.9 16.9 16.8 16.8 16.7 16.7 16.7 16.6 16.6 16.5
750 16.5 16.4 16.4 16.3 16.3 16.3 16.2 16.2 16.1 16.1
760 16.0 16.0 16.0 15.9 15.9 15.8 15.8 15.8 15.7 15.7
770 15.6 15.6 15.6 15.5 15.5 15.4 15.4 15.4 15.3 15.3
780 15.2 15.2 15.2 15.1 15.1 15.0 15.0 15.0 14.9 14.9
790 14.9 14.8 14.8 14.7 14.7 14.7 14.6 14.6 14.6 14.5
800 14.5 14.4 14.4 14.4 14.3 14.3 14.3 14.2 14.2 14.2
810 14.1 14.1 14.1 14.0 14.0 14.0 13.9 13.9 13.9 13.8
820 13.8 13.8 13.7 13.7 13.7 13.6 13.6 13.6 13.5 13.5
830 13.5 13.4 13.4 13.4 13.3 13.3 13.3 13.2 13.2 13.2
840 13.1 13.1 13.1 13.0 13.0 13.0 13.0 12.9 12.9 12.9
850 12.8 12.8 12.8 12.7 12.7 12.7 12.7 12.6 12.6 12.6
860 12.5 12.5 12.5 12.4 12.4 12.4 12.4 12.3 12.3 12.3
870 12.2 12.2 12.2 12.2 12.1 12.1 12.1 12.1 12.0 12.0
880 12.0 11.9 11.9 11.9 11.9 11.8 11.8 11.8 11.8 11.7
890 11.7 11.7 11.7 11.6 11.6 11.6 11.5 11.5 11.5 11.5
900 11.4 11.4 11.4 11.4 11.3 11.3 11.3 11.3 11.2 11.2
910 11.2 11.2 11.1 11.1 11.1 11.1 11.0 11.0 11.0 11.0
920 11.0 10.9 10.9 10.9 10.9 10.8 10.8 10.8 10.8 10.7
930 10.7 10.7 10.7 10.6 10.6 10.6 10.6 10.6 10.5 10.5
30

Load 10kgf
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
100 1854 1817 1782 1748 1714 1682 1650 1619 1590 1560
110 1532 1505 1478 1452 1427 1402 1378 1354 1332 1309
120 1288 1266 1246 1225 1206 1187 1168 1149 1132 1114
130 1097 1080 1064 1048 1033 1017 1002 988 974 960
140 946 933 919 907 894 882 870 858 846 835
150 824 813 802 792 782 772 762 752 743 733
160 724 715 706 698 689 681 673 665 657 649
170 642 634 627 619 612 605 599 592 585 579
180 572 566 560 554 548 542 536 530 525 519
190 514 508 503 498 493 488 483 478 473 468
200 464 459 454 450 446 441 437 433 429 424
210 420 416 413 409 405 401 397 394 390 387
220 383 380 376 373 369 366 363 360 357 354
230 350 347 344 342 339 336 333 330 327 325
240 322 319 317 314 311 309 306 304 301 299
250 297 294 292 290 287 285 283 281 279 276
260 274 272 270 268 266 264 262 260 258 256
270 254 252 251 249 247 245 243 242 240 238
280 236 235 233 231 230 228 227 225 224 222
290 220 219 217 216 214 213 212 210 209 207
300 206 205 203 202 201 199 198 197 195 194
310 193 192 190 189 188 187 186 184 183 182
320 181 180 179 178 177 176 174 173 172 171
330 170 169 168 167 166 165 164 163 162 161
340 160 159 159 158 157 156 155 154 153 152
350 151 150 150 149 148 147 146 145 145 144
360 143 142 141 141 140 139 138 138 137 136
370 135 135 134 133 133 132 131 130 130 129
380 128 128 127 126 126 125 124 124 123 123
390 122 121 121 120 119 119 118 118 117 116
400 116 115 115 114 114 113 112 112 111 111
410 110 110 109 109 108 108 107 107 106 106
420 105 105 104 104 103 103 102 102 101 101
430 100 99.8 99.3 98.9 98.4 98.0 97.5 97.1 96.6 96.2
440 95.8 95.3 94.9 94.5 94.0 93.6 93.2 92.8 92.4 92.0
450 91.6 91.1 90.7 90.3 89.9 89.6 89.2 88.8 88.4 88.0
460 87.6 87.2 86.9 86.5 86.1 85.7 85.4 85.0 84.6 84.3
470 83.9 83.6 83.2 82.9 82.5 82.2 81.8 81.5 81.1 80.8
480 80.5 80.1 79.8 79.5 79.1 78.8 78.5 78.2 77.9 77.5
490 77.2 76.9 76.6 76.3 76.0 75.7 75.4 75.1 74.8 74.5
500 74.2 73.9 73.6 73.3 73.0 72.7 72.4 72.1 71.8 71.6
510 71.3 71.0 70.7 70.4 70.2 69.9 69.6 69.4 69.1 68.8
520 68.6 68.3 68.0 67.8 67.5 67.3 67.0 66.8 66.5 66.3
530 66.0 65.8 65.5 65.3 65.0 64.8 64.5 64.3 64.1 63.8
540 63.6 63.3 63.1 62.9 62.6 62.4 62.2 62.0 61.7 61.5
550 61.3 61.1 60.8 60.6 60.4 60.2 60.0 59.8 59.5 59.3
31

Load 10kgf
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
560 59.1 58.9 58.7 58.5 58.3 58.1 57.9 57.7 57.5 57.3
570 57.1 56.9 56.7 56.5 56.3 56.1 55.9 55.7 55.5 55.3
580 55.1 54.9 54.7 54.5 54.4 54.2 54.0 53.8 53.6 53.4
590 53.3 53.1 52.9 52.7 52.5 52.4 52.2 52.0 51.8 51.7
600 51.5 51.3 51.2 51.0 50.8 50.7 50.5 50.3 50.2 50.0
610 49.8 49.7 49.5 49.3 49.2 49.0 48.9 48.7 48.5 48.4
620 48.2 48.1 47.9 47.8 47.6 47.5 47.3 47.2 47.0 46.9
630 46.7 46.6 46.4 46.3 46.1 46.0 45.8 45.7 45.5 45.4
640 45.3 45.1 45.0 44.8 44.7 44.6 44.4 44.3 44.2 44.0
650 43.9 43.7 43.6 43.5 43.3 43.2 43.1 43.0 42.8 42.7
660 42.6 42.4 42.3 42.2 42.1 41.9 41.8 41.7 41.5 41.4
670 41.3 41.2 41.1 40.9 40.8 40.7 40.6 40.5 40.3 40.2
680 40.1 40.0 39.9 39.7 39.6 39.5 39.4 39.3 39.2 39.1
690 38.9 38.8 38.7 38.6 38.5 38.4 38.3 38.2 38.1 37.9
700 37.8 37.7 37.6 37.5 37.4 37.3 37.2 37.1 37.0 36.9
710 36.8 36.7 36.6 36.5 36.4 36.3 36.2 36.1 36.0 35.9
720 35.8 35.7 35.6 35.5 35.4 35.3 35.2 35.1 35.0 34.9
730 34.8 34.7 34.6 34.5 34.4 34.3 34.2 34.1 34.0 33.9
740 33.9 33.8 33.7 33.6 33.5 33.4 33.3 33.2 33.1 33.0
750 33.0 32.9 32.8 32.7 32.6 32.5 32.4 32.4 32.3 32.2
760 32.1 32.0 31.9 31.8 31.8 31.7 31.6 31.5 31.4 31.4
770 31.3 31.2 31.1 31.0 30.9 30.9 30.8 30.7 30.6 30.6
780 30.5 30.4 30.3 30.2 30.2 30.1 30.0 29.9 29.9 29.8
790 29.7 29.6 29.6 29.5 29.4 29.3 29.3 29.2 29.1 29.0
800 29.0 28.9 28.8 28.8 28.7 28.6 28.5 28.5 28.4 28.3
810 28.3 28.2 28.1 28.0 28.0 27.9 27.8 27.8 27.7 27.6
820 27.6 27.5 27.4 27.4 27.3 27.2 27.2 27.1 27.0 27.0
830 26.9 26.8 26.8 26.7 26.7 26.6 26.5 26.5 26.4 26.3
840 26.3 26.2 26.2 26.1 26.0 26.0 25.9 25.8 25.8 25.7
850 25.7 25.6 25.5 25.5 25.4 25.4 25.3 25.2 25.2 25.1
860 25.1 25.0 25.0 24.9 24.8 24.8 24.7 24.7 24.6 24.6
870 24.5 24.4 24.4 24.3 24.3 24.2 24.2 24.1 24.1 24.0
880 23.9 23.9 23.8 23.8 23.7 23.7 23.6 23.6 23.5 23.5
890 23.4 23.4 23.3 23.2 23.2 23.1 23.1 23.0 23.0 22.9
900 22.9 22.8 22.8 22.7 22.7 22.6 22.6 22.5 22.5 22.4
910 22.4 22.3 22.3 22.2 22.2 22.1 22.1 22.0 22.0 22.0
920 21.9 21.9 21.8 21.8 21.7 21.7 21.6 21.6 21.5 21.5
930 21.4 21.4 21.3 21.3 21.3 21.2 21.2 21.1 21.1 21.0
940 21.0 20.9 20.9 20.8 20.8 20.8 20.7 20.7 20.6 20.6
950 20.5 20.5 20.5 20.4 20.4 20.3 20.3 20.2 20.2 20.2
960 20.1 20.1 20.0 20.0 20.0 19.9 19.9 19.8 19.8 19.7
970 19.7 19.7 19.6 19.6 19.5 19.5 19.5 19.4 19.4 19.3
980 19.3 19.3 19.2 19.2 19.1 19.1 19.1 19.0 19.0 19.0
990 18.9 18.9 18.8 18.8 18.8 18.7 18.7 18.7 18.6 18.6
32

Load 20kgf
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
130 2194 2161 2128 2096 2065 2035 2005 1976 1947 1919
140 1892 1865 1839 1813 1788 1764 1740 1716 1693 1670
150 1648 1626 1605 1584 1564 1543 1524 1504 1485 1467
160 1448 1431 1413 1396 1379 1362 1346 1330 1314 1298
170 1283 1268 1253 1239 1225 1211 1197 1184 1170 1157
180 1144 1132 1119 1107 1095 1083 1072 1060 1049 1038
190 1027 1016 1006 995 985 975 965 955 946 936
200 927 918 909 900 891 882 874 865 857 849
210 841 833 825 817 810 802 795 787 780 773
220 766 759 752 746 739 732 726 720 713 707
230 701 695 689 683 677 671 666 660 655 649
240 644 638 633 628 623 618 613 608 603 598
250 593 589 584 579 575 570 566 561 557 553
260 549 544 540 536 532 528 524 520 516 512
270 509 505 501 498 494 490 487 483 480 476
280 473 470 466 463 460 457 453 450 447 444
290 441 438 435 432 429 426 423 420 418 415
300 412 409 407 404 401 399 396 393 391 388
310 386 383 381 378 376 374 371 369 367 364
320 362 360 358 355 353 351 349 347 345 343
330 340 338 336 334 332 330 328 326 325 323
340 321 319 317 315 313 312 310 308 306 304
350 303 301 299 298 296 294 293 291 289 288
360 286 285 283 281 280 278 277 275 274 272
370 271 269 268 267 265 264 262 261 260 258
380 257 255 254 253 251 250 249 248 246 245
390 244 243 241 240 239 238 236 235 234 233
400 232 231 229 228 227 226 225 224 223 222
410 221 220 218 217 216 215 214 213 212 211
420 210 209 208 207 206 205 204 203 202 201
430 201 200 199 198 197 196 195 194 193 192
440 192 191 190 189 188 187 186 186 185 184
450 183 182 181 181 180 179 178 178 177 176
460 175 174 174 173 172 171 171 170 169 169
470 168 167 166 166 165 164 164 163 162 162
480 161 160 160 159 158 158 157 156 156 155
490 154 154 153 153 152 151 151 150 150 149
500 148 148 147 147 146 145 145 144 144 143
510 143 142 141 141 140 140 139 139 138 138
520 137 137 136 136 135 135 134 134 133 133
530 132 132 131 131 130 130 129 129 128 128
540 127 127 126 126 125 125 124 124 123 123
550 123 122 122 121 121 120 120 120 119 119
560 118 118 117 117 117 116 116 115 115 115
570 114 114 113 113 113 112 112 111 111 111
33

Load 20kgf
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
580 110 110 109 109 109 108 108 108 107 107
590 107 106 106 105 105 105 104 104 104 103
600 103 103 102 102 102 101 101 101 100 100
610 99.7 99.3 99.0 98.7 98.4 98.0 97.7 97.4 97.1 96.8
620 96.5 96.2 95.8 95.5 95.2 94.9 94.6 94.3 94.0 93.7
630 93.4 93.1 92.8 92.5 92.2 92.0 91.7 91.4 91.1 90.8
640 90.5 90.2 90.0 89.7 89.4 89.1 88.9 88.6 88.3 88.0
650 87.8 87.5 87.2 87.0 86.7 86.4 86.2 85.9 85.6 85.4
660 85.1 84.9 84.6 84.4 84.1 83.8 83.6 83.3 83.1 82.8
670 82.6 82.4 82.1 81.9 81.6 81.4 81.1 80.9 80.7 80.4
680 80.2 80.0 79.7 79.5 79.3 79.0 78.8 78.6 78.3 78.1
690 77.9 77.7 77.4 77.2 77.0 76.8 76.5 76.3 76.1 75.9
700 75.7 75.5 75.2 75.0 74.8 74.6 74.4 74.2 74.0 73.8
710 73.6 73.4 73.1 72.9 72.7 72.5 72.3 72.1 71.9 71.7
720 71.5 71.3 71.1 70.9 70.7 70.5 70.4 70.2 70.0 69.8
730 69.6 69.4 69.2 69.0 68.8 68.6 68.5 68.3 68.1 67.9
740 67.7 67.5 67.3 67.2 67.0 66.8 66.6 66.5 66.3 66.1
750 65.9 65.7 65.6 65.4 65.2 65.0 64.9 64.7 64.5 64.4
760 64.2 64.0 63.9 63.7 63.5 63.4 63.2 63.0 62.9 62.7
770 62.5 62.4 62.2 62.1 61.9 61.7 61.6 61.4 61.3 61.1
780 60.9 60.8 60.6 60.5 60.3 60.2 60.0 59.9 59.7 59.6
790 59.4 59.3 59.1 59.0 58.8 58.7 58.5 58.4 58.2 58.1
800 57.9 57.8 57.6 57.5 57.4 57.2 57.1 56.9 56.8 56.7
810 56.5 56.4 56.2 56.1 56.0 55.8 55.7 55.6 55.4 55.3
820 55.1 55.0 54.9 54.7 54.6 54.5 54.3 54.2 54.1 54.0
830 53.8 53.7 53.6 53.4 53.3 53.2 53.1 52.9 52.8 52.7
840 52.6 52.4 52.3 52.2 52.1 51.9 51.8 51.7 51.6 51.4
850 51.3 51.2 51.1 51.0 50.8 50.7 50.6 50.5 50.4 50.3
860 50.1 50.0 49.9 49.8 49.7 49.6 49.4 49.3 49.2 49.1
870 49.0 48.9 48.8 48.7 48.5 48.4 48.3 48.2 48.1 48.0
880 47.9 47.8 47.7 47.6 47.4 47.3 47.2 47.1 47.0 46.9
890 46.8 46.7 46.6 46.5 46.4 46.3 46.2 46.1 46.0 45.9
900 45.8 45.7 45.6 45.5 45.4 45.3 45.2 45.1 45.0 44.9
910 44.8 44.7 44.6 44.5 44.4 44.3 44.2 44.1 44.0 43.9
920 43.8 43.7 43.6 43.5 43.4 43.3 43.2 43.1 43.1 43.0
930 42.9 42.8 42.7 42.6 42.5 42.4 42.3 42.2 42.1 42.1
940 42.0 41.9 41.8 41.7 41.6 41.5 41.4 41.3 41.3 41.2
950 41.1 41.0 40.9 40.8 40.7 40.7 40.6 40.5 40.4 40.3
960 40.2 40.2 40.1 40.0 39.9 39.8 39.7 39.7 39.6 39.5
970 39.4 39.3 39.2 39.2 39.1 39.0 38.9 38.8 38.8 38.7
980 38.6 38.5 38.5 38.4 38.3 38.2 38.1 38.1 38.0 37.9
990 37.8 37.8 37.7 37.6 37.5 37.5 37.4 37.3 37.2 37.2
34

Load 30kgf
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
160 2173 2146 2119 2093 2068 2043 2018 1994 1971 1947
170 1925 1902 1880 1858 1837 1816 1796 1775 1755 1736
180 1717 1698 1679 1661 1643 1625 1608 1591 1574 1557
190 1541 1525 1509 1493 1478 1463 1448 1433 1419 1405
200 1391 1377 1363 1350 1337 1323 1311 1298 1286 1273
210 1261 1249 1238 1226 1215 1203 1192 1181 1170 1160
220 1149 1139 1129 1118 1108 1099 1089 1079 1070 1061
230 1051 1042 1033 1025 1016 1007 999 990 982 974
240 966 958 950 942 934 927 919 912 904 897
250 890 883 876 869 862 855 849 842 836 829
260 823 816 810 804 798 792 786 780 774 769
270 763 757 752 746 741 735 730 725 720 715
280 709 704 699 694 690 685 680 675 671 666
290 661 657 652 648 643 639 635 631 626 622
300 618 614 610 606 602 598 594 590 586 583
310 579 575 571 568 564 561 557 553 550 547
320 543 540 536 533 530 527 523 520 517 514
330 511 508 505 502 499 496 493 490 487 484
340 481 478 476 473 470 467 465 462 459 457
350 454 451 449 446 444 441 439 436 434 432
360 429 427 424 422 420 417 415 413 411 408
370 406 404 402 400 398 396 393 391 389 387
380 385 383 381 379 377 375 373 371 369 368
390 366 364 362 360 358 356 355 353 351 349
400 348 346 344 342 341 339 337 336 334 332
410 331 329 328 326 325 323 321 320 318 317
420 315 314 312 311 309 308 306 305 304 302
430 301 299 298 297 295 294 293 291 290 289
440 287 286 285 283 282 281 280 278 277 276
450 275 273 272 271 270 269 267 266 265 264
460 263 262 261 259 258 257 256 255 254 253
470 252 251 250 249 248 247 245 244 243 242
480 241 240 239 238 237 236 235 235 234 233
490 232 231 230 229 228 227 226 225 224 223
500 222 222 221 220 219 218 217 216 216 215
510 214 213 212 211 211 210 209 208 207 206
520 206 205 204 203 203 202 201 200 200 199
530 198 197 197 196 195 194 194 193 192 191
540 191 190 189 189 188 187 187 186 185 185
550 184 183 183 182 181 181 180 179 179 178
560 177 177 176 175 175 174 174 173 172 172
570 171 171 170 169 169 168 168 167 166 166
580 165 165 164 164 163 163 162 161 161 160
590 160 159 159 158 158 157 157 156 156 155
600 155 154 153 153 152 152 151 151 150 150
35

Load 30kgf
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
610 149 149 149 148 148 147 147 146 146 145
620 145 144 144 143 143 142 142 141 141 141
630 140 140 139 139 138 138 138 137 137 136
640 136 135 135 135 134 134 133 133 132 132
650 132 131 131 130 130 130 129 129 128 128
660 128 127 127 127 126 126 125 125 125 124
670 124 124 123 123 122 122 122 121 121 121
680 120 120 120 119 119 119 118 118 118 117
690 117 116 116 116 115 115 115 114 114 114
700 114 113 113 113 112 112 112 111 111 111
710 110 110 110 109 109 109 108 108 108 108
720 107 107 107 106 106 106 106 105 105 105
730 104 104 104 104 103 103 103 102 102 102
740 102 101 101 101 100 100 99.9 99.7 99.4 99.1
750 98.9 98.6 98.4 98.1 97.8 97.6 97.3 97.1 96.8 96.5
760 96.3 96.0 95.8 95.5 95.3 95.0 94.8 94.5 94.3 94.1
770 93.8 93.6 93.3 93.1 92.8 92.6 92.4 92.1 91.9 91.7
780 91.4 91.2 91.0 90.7 90.5 90.3 90.0 89.8 89.6 89.3
790 89.1 88.9 88.7 88.4 88.2 88.0 87.8 87.6 87.3 87.1
800 86.9 86.7 86.5 86.3 86.0 85.8 85.6 85.4 85.2 85.0
810 84.8 84.6 84.4 84.1 83.9 83.7 83.5 83.3 83.1 82.9
820 82.7 82.5 82.3 82.1 81.9 81.7 81.5 81.3 81.1 80.9
830 80.7 80.5 80.3 80.2 80.0 79.8 79.6 79.4 79.2 79.0
840 78.8 78.6 78.5 78.3 78.1 77.9 77.7 77.5 77.3 77.2
850 77.0 76.8 76.6 76.4 76.3 76.1 75.9 75.7 75.6 75.4
860 75.2 75.0 74.9 74.7 74.5 74.3 74.2 74.0 73.8 73.7
870 73.5 73.3 73.1 73.0 72.8 72.6 72.5 72.3 72.2 72.0
880 71.8 71.7 71.5 71.3 71.2 71.0 70.9 70.7 70.5 70.4
890 70.2 70.1 69.9 69.7 69.6 69.4 69.3 69.1 69.0 68.8
900 68.7 68.5 68.4 68.2 68.1 67.9 67.8 67.6 67.5 67.3
910 67.2 67.0 66.9 66.7 66.6 66.4 66.3 66.1 66.0 65.9
920 65.7 65.6 65.4 65.3 65.1 65.0 64.9 64.7 64.6 64.4
930 64.3 64.2 64.0 63.9 63.8 63.6 63.5 63.4 63.2 63.1
940 62.9 62.8 62.7 62.5 62.4 62.3 62.2 62.0 61.9 61.8
950 61.6 61.5 61.4 61.2 61.1 61.0 60.9 60.7 60.6 60.5
960 60.4 60.2 60.1 60.0 59.9 59.7 59.6 59.5 59.4 59.2
970 59.1 59.0 58.9 58.7 58.6 58.5 58.4 58.3 58.2 58.0
980 57.9 57.8 57.7 57.6 57.4 57.3 57.2 57.1 57.0 56.9
990 56.7 56.6 56.5 56.4 56.3 56.2 56.1 56.0 55.8 55.7
36

Load 50kgf
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
190 2568 2541 2515 2489 2463 2438 2413 2389 2365 2341
200 2318 2294 2272 2250 2228 2206 2184 2163 2143 2122
210 2102 2082 2063 2043 2024 2005 1987 1969 1951 1933
220 1915 1898 1881 1864 1847 1831 1815 1799 1783 1768
230 1752 1737 1722 1708 1693 1679 1664 1650 1637 1623
240 1609 1596 1583 1570 1557 1544 1532 1519 1507 1495
250 1483 1471 1460 1448 1437 1426 1414 1404 1393 1382
260 1371 1361 1350 1340 1330 1320 1310 1300 1291 1281
270 1272 1262 1253 1244 1235 1226 1217 1208 1199 1191
280 1182 1174 1166 1157 1149 1141 1133 1125 1118 1110
290 1102 1095 1087 1080 1072 1065 1058 1051 1044 1037
300 1030 1023 1016 1010 1003 997 990 984 977 971
310 965 958 952 946 940 934 928 922 917 911
320 905 900 894 889 883 878 872 867 862 856
330 851 846 841 836 831 826 821 816 811 807
340 802 797 793 788 783 779 774 770 765 761
350 757 752 748 744 740 736 731 727 723 719
360 715 711 707 704 700 696 692 688 685 681
370 677 673 670 666 663 659 656 652 649 645
380 642 639 635 632 629 625 622 619 616 613
390 609 606 603 600 597 594 591 588 585 582
400 579 576 574 571 568 565 562 560 557 554
410 551 549 546 543 541 538 536 533 531 528
420 526 523 521 518 516 513 511 508 506 504
430 501 499 497 494 492 490 488 485 483 481
440 479 477 474 472 470 468 466 464 462 460
450 458 456 454 452 450 448 446 444 442 440
460 438 436 434 432 431 429 427 425 423 421
470 420 418 416 414 413 411 409 407 406 404
480 402 401 399 397 396 394 392 391 389 388
490 386 385 383 381 380 378 377 375 374 372
500 371 369 368 366 365 363 362 361 359 358
510 356 355 354 352 351 350 348 347 345 344
520 343 342 340 339 338 336 335 334 333 331
530 330 329 328 326 325 324 323 321 320 319
540 318 317 316 314 313 312 311 310 309 308
550 306 305 304 303 302 301 300 299 298 297
560 296 295 293 292 291 290 289 288 287 286
570 285 284 283 282 281 280 279 278 277 277
580 276 275 274 273 272 271 270 269 268 267
590 266 265 265 264 263 262 261 260 259 258
600 258 257 256 255 254 253 252 252 251 250
610 249 248 248 247 246 245 244 244 243 242
620 241 240 240 239 238 237 237 236 235 234
630 234 233 232 231 231 230 229 228 228 227
37

Load 50kgf
Diagonal Vickers Hardness Number
(µm) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
640 226 226 225 224 224 223 222 221 221 220
650 219 219 218 217 217 216 215 215 214 213
660 213 212 212 211 210 210 209 208 208 207
670 207 206 205 205 204 203 203 202 202 201
680 200 200 199 199 198 198 197 196 196 195
690 195 194 194 193 192 192 191 191 190 190
700 189 189 188 188 187 187 186 185 185 184
710 184 183 183 182 182 181 181 180 180 179
720 179 178 178 177 177 176 176 175 175 174
730 174 173 173 173 172 172 171 171 170 170
740 169 169 168 168 167 167 167 166 166 165
750 165 164 164 163 163 163 162 162 161 161
760 160 160 160 159 159 158 158 158 157 157
770 156 156 156 155 155 154 154 154 153 153
780 152 152 152 151 151 150 150 150 149 149
790 149 148 148 147 147 147 146 146 146 145
800 145 144 144 144 143 143 143 142 142 142
810 141 141 141 140 140 140 139 139 139 138
820 138 138 137 137 137 136 136 136 135 135
830 135 134 134 134 133 133 133 132 132 132
840 131 131 131 130 130 130 130 129 129 129
850 128 128 128 127 127 127 127 126 126 126
860 125 125 125 124 124 124 124 123 123 123
870 122 122 122 122 121 121 121 121 120 120
880 120 119 119 119 119 118 118 118 118 117
890 117 117 117 116 116 116 115 115 115 115
900 114 114 114 114 113 113 113 113 112 112
910 112 112 111 111 111 111 110 110 110 110
920 110 109 109 109 109 108 108 108 108 107
930 107 107 107 106 106 106 106 106 105 105
940 105 105 104 104 104 104 104 103 103 103
950 103 102 102 102 102 102 101 101 101 101
960 101 100 100 100 99.8 99.5 99.3 99.1 98.9 98.7
970 98.5 98.3 98.1 97.9 97.7 97.5 97.3 97.1 96.9 96.7
980 96.5 96.3 96.1 95.9 95.7 95.5 95.4 95.2 95.0 94.8
990 94.6 94.4 94.2 94.0 93.8 93.6 93.4 93.3 93.1 92.9
38