1% of yield strenght for ASME material Stainless Steel 1

[Matrix_93]

Hello,
About yield strenght of stainless steel material, ASME uses 0.2% of yield strenght.
How Can I have the 1% of yield strenght for the same material?
I can't use tension-strain relationship because I don't know the value of Stress at 1% of yield strenght.
I have seen ASME II A, IID, VIII div.1 and the only thing I have found is a table with 1% of yield strenght values at room temperaturem but not at different temperatures.

 

[EdStainless]

Of course 1% is significant plastic deformation, well beyond where most devices would be usable.
You have 0.2% Yield and UTS as a function of temp, and you have a RT 1% Yield.
Apply the same temp de-rates to the 1% value. You may need to average the temp derates from Y and UTS.
But why?
There are publications that have collections of test curves over a range of temperatures. There is an ASM High-Temperature properties of steels, It gives a lot of such data.


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P.E. Metallurgy

 

[IdanPV]

Hello,

In EN 10088-2 you may find what you are looking for.

 

[DriveMeNuts]

EN 10028-7 is for Stainless steel for pressure vessels.
It has both 0.2% ans 1% proof stresses.
European codes use the 1% proof yield for the basis of allowable design strength. It does obviously result in increased plastic deformation. The competent engineer needs to decide if the deformation is acceptable for the application.
As per Appendix 44, Stainless steel can be cold stretched much greater than even 2% and remain safe to use.

I presume you mean Austenitic Stainless. Ferritic Stainless should not be taken beyond 0.2%.