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Allowable Stress for SA-516-70

Allowable Stress for SA-516-70

Allowable Stress for SA-516-70

(OP)
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.  

RE: Allowable Stress for SA-516-70

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

RE: Allowable Stress for SA-516-70

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

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