Does Heat Treating Metal Change Published ASME Allowable Stress?
Does Heat Treating Metal Change Published ASME Allowable Stress?
(OP)
I'm running across a code issue that I can't seem to work out. I can look up temperature deratings for allowable stress easily per ASME B31.3 Table A-2. However, if I buy a bolt material (say A354 Grade 8 for example) and I heat treat it by tempering or quenching, would the temperature derating data still apply? If it doesn't apply, how do I find code compliant values to reflect the increase in allowable stress from the results of heat treatment? Thanks.





RE: Does Heat Treating Metal Change Published ASME Allowable Stress?
RE: Does Heat Treating Metal Change Published ASME Allowable Stress?
RE: Does Heat Treating Metal Change Published ASME Allowable Stress?
Correct, if the heat treatment was not part of fabrication. For Section I there is an interpretation on performance of mechanical testing after fabrication to verify original material properties. The reply is no.
In your case if you are subjecting a bolt to heat treatment, which is not part of fabrication, to intentionally alter the mechanical properties, you would not be permitted to use the material.
RE: Does Heat Treating Metal Change Published ASME Allowable Stress?
RE: Does Heat Treating Metal Change Published ASME Allowable Stress?