Stainless Steels

[nadfourchon]

Is there any document / code stating why material hardness testing is not required after welding stainless steel pipe, such as 316 and duplex? Or is it required by some codes and not others.

 

[metengr]

nadfourchon;
Regarding Codes and Standards, there typically is no hardness testing required after welding because from a code standpoint austenitic grades and certain duplex grades of stainless steel do not harden from thermal treatment.