Allowable Stress for SA-516-70

[wallace24]

Hi,
Is it possible to issure a purchase order for SA-516-70 with a stated elevated min. yield strength - and be able to establish an elevated allowable stress (ie, Sa = Sy x 2/3)?
This would of course be for higher temperatures where the yield governs Sa.
Thanks.

 

[metengr]

Are you familar with ASME Boiler and Pressure Vessel Code allowable stress values?

 

[wallace24]

I guess "etched in stone" and the "values" in the tables would go in the same sentence.
Thank you.