eatment
Temperature Range
Cooling/Quenching
Notes
Forging
2000-2100° F
Slow.
Heat slowly and uniformly. Do not forge below 1700°F. Cool in vermiculite or other insulating media.
Annealing
1545-1600° F
Cool slowly at a rate of 25° F per hour to 1000° F.
Protect against surface decarburization using controlled atmosphere or by pack-annealing.
Stress Relieving
1020-1200° F
Cool slowly in furnace to 930° F. Then in air.
Stress relieve after rough machining
Preheating
1450-1500° F
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Preheat time in furnace is ¾ Hr. per inch of thickness. Heating up to temperature as slow as possible
Hardening
1800-1900° F
In air.
Temper immediately after hardening. Allow to cool to 125-150° F before tempering. Soak time is 15 minutes per inch of thickness. Minimum of 30 minutes.
Tempering
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Complete equalization of temperature throughout the tool is essential for good results. Double temper. Recommended temperature is 400-1000° F
