Practical Data for Metallurgists - Timken

END-QUENCH HARDENABILITY BANDS
Tabulations of Band Limits – 4042 H to 4142 H
These values were adjusted to the nearest Rockwell “C” point, and are used when points are selected and specified
“J” GRADE
Distance
4047 H 4118 H 4120 H 4130 H 4135 H 4137 H 4140 H 4142 H
Sixteenths
of an Inch Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min.
1 64 57 48 41 48 41 56 49 58 51 59 52 60 53 62 55
2 62 55 46 36 47 37 55 46 58 50 59 51 60 53 62 55
3 60 50 41 27 44 32 53 42 57 49 58 50 60 52 62 54
4 58 42 35 23 41 37 51 38 56 48 58 49 59 51 61 53
5 55 35 31 20 37 23 49 34 56 47 57 49 59 51 61 53
6 52 32 28 ... 34 21 47 31 55 45 57 48 58 50 61 52
7 47 30 27 ... 32 ... 44 29 54 42 56 45 58 48 60 51
8 43 28 25 ... 30 ... 42 27 53 40 55 43 57 47 60 50
9 40 28 24 ... 29 ... 40 26 52 38 55 40 57 44 60 49
10 38 27 23 ... 28 ... 38 26 51 36 54 39 56 42 59 47
11 37 26 22 ... 27 ... 36 25 50 34 53 37 56 40 59 46
12 35 26 21 ... 26 ... 35 25 49 33 52 36 55 39 58 44
13 34 25 21 ... 25 ... 34 24 48 32 51 35 55 38 58 42
14 33 25 20 ... 25 ... 34 24 47 31 50 34 54 37 57 41
15 33 25 ... ... 24 ... 33 23 46 30 49 33 54 36 57 40
16 32 25 ... ... 24 ... 33 23 45 30 48 33 53 35 56 39
18 31 24 ... ... 23 ... 32 22 44 29 46 32 52 34 55 37
20 30 24 ... ... 23 ... 32 21 42 28 45 31 51 33 54 36
22 30 23 ... ... 23 ... 32 20 41 27 44 30 49 33 53 35
24 30 23 ... ... 23 ... 31 ... 40 27 43 30 48 32 53 34
26 30 22 ... ... 23 ... 31 ... 39 27 42 30 47 32 52 34
28 29 22 ... ... 22 ... 30 ... 38 26 42 29 46 31 51 34
30 29 21 ... ... 22 ... 30 ... 38 26 41 29 45 31 51 33
32 29 21 ... ... 22 ... 29 ... 37 26 41 29 44 30 50 33
52