A-2 Air Hardening tool Steel
Flats - Rounds - Squares - Hollowbar
Standard Sizes - Non-Standard Sizes - Metric Sizes
Outstanding combination of abrasion resistance and toughness.
Good size stability in heat treatment.
Good hardenability.
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TREATMENT
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TEMPERATURE RANGE
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COOLING/QUENCHING
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NOTES
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FORGING
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2000-2100° F
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Cool Slowly
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Heat slowly and uniformly. Cool in vermiculite or in other insulating media. Anneal
after forging.
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ANNEALING
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1545-1580° F
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Cool slowly at a rate of 25° F per hour to 1110° F.
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Protect against surface decarburization using controlled atmosphere or by pack-annealing.
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STRESS RELIEVING
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1020-1200° F
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Cool slowly in furnace to 950° F. Then in air.
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Stress relieve after rough machining
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PREHEATING
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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.
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HARDENING
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1700-1800° F
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In air.
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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.
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TEMPERING
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(See Chart)
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Complete equalization of temperature throughout the tools is essential for good
results. Double temper. Recommended temperature is 400-1000° F.
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Data is typical and should not be construed as actual values for any catagory.
Applications and technical information require engineers and tool designers to exercise
independent judgement.