Cracking after PWHT
Cracking after PWHT
(OP)
Hi.
I want to know what types of Cracking can occur after PWHT, and how size each type of cracking can grow?
Thank you for your consideration.
I want to know what types of Cracking can occur after PWHT, and how size each type of cracking can grow?
Thank you for your consideration.





RE: Cracking after PWHT
reheat cracking
delayed cracking from hydrogen embrittlement
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RE: Cracking after PWHT
And another question, do these two type only occur?
Special thanks to you metengr for your consideration.
Thank you.
RE: Cracking after PWHT
Probably reheat cracking and delayed cracking account for 90% of the post weld heat treatment defects in common steels. You can have stress relaxation cracking in certain nickel-base alloys, similar to reheat cracking but not quite the same.
RE: Cracking after PWHT
RE: Cracking after PWHT
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Delayed cracking or hydrogen embrittlement can occur some time after welding (immediate or delayed in time by 24 to 48 hours). I have seen it after PWHT because NDT was done after PWHT. Also, the cracking can occur before PWHT, when subsurface and after PWHT is observed at the surface.
RE: Cracking after PWHT