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AISI 4140 80K MYS 1
- Thread starter Ruslanag
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Well that's a wide open question.
The strength will derate as temperature increases. In general, staying 100F below the temper temperature will maintain strength unless extended times are seen. Take a look at the Holloman-Jaffe parameter and equate the temperature/time used for the temper heat treatment to the same Holloman-Jaffe value for a reduced temperature of interest. This would give you an estimate of the time required at that reduced temperature to have the same effect as the temper heat treatment.
The strength will derate as temperature increases. In general, staying 100F below the temper temperature will maintain strength unless extended times are seen. Take a look at the Holloman-Jaffe parameter and equate the temperature/time used for the temper heat treatment to the same Holloman-Jaffe value for a reduced temperature of interest. This would give you an estimate of the time required at that reduced temperature to have the same effect as the temper heat treatment.
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