Heat Treatment Guide
The chart below describes various types of tool steels, their composition and appropriate heat treating applications.
Steel | Composition | Harden °F | Temper °F | Anneal °F | Normalize °F | Quench | Atmosphere |
---|---|---|---|---|---|---|---|
A2 | Medium Alloy | 1700-1800 | 350-1000 | 1550-1600 | 0 | Air | * Air / Inert |
A6 | High Carbon | 1800-1875 | 400-1000 | 1600-1650 | 0 | Air | * Air / Inert |
D2 | High Carbon | 1800-1875 | 400-1000 | 1600-1650 | 0 | Air | * Air / Inert |
O1 | Oil Harden | 1450-1500 | 350-500 | 1400-1450 | 1600 | Oil | * Air / Inert |
W1 | Water Harden | 1400-1550 | 350-650 | 1360-1400 | 1450-1600 | Water | * Air / Inert |
S7 | Shock Resisting | 1650-1750 | 400-1200 | 1500-1550 | 0 | Oil | * Air / Inert / Natural Gas |
H13 | Hot Work Alloy | 1825-1875 | 1000-1200 | 1550-1650 | 0 | Air / Oil | * Air / Endo. |
M2 | Molybdenum High Speed | 2150-2250 | 1000-1200 | 1600-1650 | 0 | Air / Oil / Salt | * Air / Endo. |
T2 | Tungsten High Speed | 2300-2375 | 1000-1100 | 1600-1650 | 0 | Air / Oil / Salt | * Air / Endo. |
1040 | Medium Carbon | 1550 | 1550 | 1550 | 1650 | Water | ---- |
4130 | Alloy Steel | 1600 | 0 | 1575 | 1625 | Oil | ---- |
4140 | Medium Carbon | 1575 | 400-1200 | 1550 | 1600 | Oil | * Air / Dis. Ammonia |
Consult with a metallurgist or steel supplier for exact temperature ranges and type of atmosphere for the desired steel finish.