converting yield strength
converting yield strength
(OP)
Hi all,
I have an Material Test Report for a material that has a Y.S of 30000 psi @ .2% offset. Heres the question, the spec the previous guy wrote say 35000 psi @ 1% offset. Is there a conversion for this to compare apples to apples.
I have an Material Test Report for a material that has a Y.S of 30000 psi @ .2% offset. Heres the question, the spec the previous guy wrote say 35000 psi @ 1% offset. Is there a conversion for this to compare apples to apples.





RE: converting yield strength
No. There is no direct conversion to equate % offset with YS. You can attempt to calculate what the expected YS or flow stress would be for this material based on using a strain hardening equation. However, I would not risk acceptance or rejection of material for an application using the above equation.
Go back and re-review the specification. I would suspect that there was a typo and the offset was probably at 0.1% versus 1% for reporting yield stregnth from tension tests for MTR's.
RE: converting yield strength
Can you get a stress strain curve?
Or, can you get the strain hardening exponent? Then you could calculate stress at 1% strain.
Regards,
Cory
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RE: converting yield strength
RE: converting yield strength
Also, 1% offset does not make sense. It is not a common practice for testing of metals.
RE: converting yield strength
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RE: converting yield strength