Asme vs astm materials
Asme vs astm materials
(OP)
I have an ASTM material used in a fitting at an elevated temperature. It is not listed by ASME so it doesn't have an ASME allowable stress atelevated temperature value. I may determine the allowable stress from the ASTM specs using ASME b31.3 2*Sy /3 or St/3 min. But how to get the Sy at a temperature above ambient when the ASTM Sy or St are not provided above ambient?





RE: Asme vs astm materials
By your statement above, I would presume you had checked Appendix A in B31.3 for an allowable stress for this material, and it is not listed.
If this is correct, you can try to determine an allowable stress following the requirements in B31.3. Unfortunately, for elevated temperature properties you need to either find published values or conduct testing.
RE: Asme vs astm materials
RE: Asme vs astm materials
metengr just told you how to do this: either find reliable, published data on the material(s) in question, or perform your own testing. Also, ASTM does not include data on strength vs. temperature in their standards that can be used in a similar manner to the ASME codes.
RE: Asme vs astm materials
RE: Asme vs astm materials
RE: Asme vs astm materials
chemical composition and test requirements y're okay, cert to ug-10 pg-10
the spec has to amtch that of the ASME.
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