Practical Data for Metallurgists - Timken
Practical Data for Metallurgists - Timken
Practical Data for Metallurgists - Timken
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TYPE HEAT TREATMENT<br />
4320 NORMALIZED 1700° F. — AUSTENITIZED 1700° F.<br />
CHEMICAL ANALYSIS C Mn P S Si Cr Ni Mo Cu Al V W B<br />
.18 .61 .010 .014 .29 .50 1.79 .23 .09 .021 — — —<br />
ROUND SECTION WITH SAME HARDNESS AT MID-RADIUS<br />
OIL QUENCH<br />
.4-.5 Hv 1" 2" 3" 4" 5" 6" ~9"<br />
MILD WATER<br />
AIR<br />
QUENCH<br />
1" 2" 3" 4" 5" 6" 7" QUENCH 1" 2" 3" 4" 5" 6" 10" 15"<br />
55° F /S 25° F /S 12° F /S 7° F /S 290° F /M 200° F /M 80° F /M 32° F /M 27° F /M 19° F /M 13° F /M 12° F /M 9° F /M 6° F /M<br />
COOLING<br />
RATE<br />
LEGEND<br />
AS COOLED<br />
1000˚ F. TEMPER-2 HOURS<br />
SAE HARDENABILITY BAND<br />
AUSTENITIZING TEMPERATURE<br />
1700˚ F.<br />
60<br />
614<br />
50<br />
484<br />
74<br />
40<br />
372<br />
30<br />
ROCKWELL<br />
“C” HARDNESS<br />
283<br />
20<br />
230<br />
90<br />
185<br />
80<br />
150<br />
70<br />
128<br />
BRINELL HARDNESS – 3000 KG.<br />
60<br />
ROCKWELL<br />
“B” HARDNESS<br />
107<br />
10 15 20 27 11 /2" 11 3 1 5 48<br />
4" /4" /4" 2 /2" 6"<br />
INTERFACE<br />
SIXTEENTHS FROM QUENCHED END OF JOMINY BAR AIR HARDENABILITY DISTANCE
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