I am currently creating crucifoms to test for underbead cracking. In the textbook "Welding Metallurgy - Linnert, AWS" specifies stress relief by post weld heat treatment at 1150 F for 2 hrs. This puzzles me. Wouldn't the PWHT 1) accelerate hydrogen diffusion into the atmosphere and 2) remove residual stresses. Both required at some level for hydrogen assissted cracking. Any thoughts?
Wouldn't the PWHT 1) accelerate hydrogen diffusion into the atmosphere and 2) remove residual stresses. Both required at some level for hydrogen assissted cracking. 