ANALYSIS:
Flats - Rounds - Squares - Hollowbar
Standard Sizes - Non-Standard Sizes - Metric Sizes
Air hardening from low temperature.
Excellent size stability in heat treatment.
Deep hardening.
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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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1950-2050° F
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Slow.
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Do not forge below 1700° F. Anneal after forging. Cool slowly in the furnace
or bury in lime, fine dry asher or other insulating media.
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ANNEALING
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1325-1375° F
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Cool slowly at a rate of 25° F per hour to 1000° F.
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STRESS RELIEVING
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1200-1250° F
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Slow.
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Stress relieve after rough machining
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PREHEATING
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Preheating is not necessary but may be performed at 1200-1250° F.
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HARDENING
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1500-1600° F
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Cool in still air or in air blast.
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Allow to cool to 125-150° F before tempering. Soak time is 10 minutes
per inch of thickness. Minimum of 30 minutes
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TEMPERING
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(See Chart)
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Temper for 1 Hr. per inch of thickness with a minimum of 2 Hrs. Recommended
temperature is 350-700° F.
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