Post Weld Stress Relieving of 310SS
Post Weld Stress Relieving of 310SS
(OP)
I have a ring burner design that is composed of a rolled pipe that is sealed using a butt welde "tee" fitting. In the past I have seen failures in this design at the weld joint between the rolled pipe and tee. The ring and tee do experience direct flame contact and I am looking at changing the material from 316L SS to 310 SS with a post weld stress relief operation. I have read some literature that states that stress relieving 310SS is not benefical while some others state that it is. I would like to know if it is worth specifing a stress releive operation on the design.





RE: Post Weld Stress Relieving of 310SS
RE: Post Weld Stress Relieving of 310SS
RE: Post Weld Stress Relieving of 310SS
All I have is an photo of the burner showing one of the welds of the tee severed and a statement from an associate that there has been failures like this in the past. We do see flame impingment on other similar burner rings in other installations.
RE: Post Weld Stress Relieving of 310SS
If the failure was thermal fatigue then it will not help. In that case you would be better off with a ferritic grade.
Don't bother with stress relief. The only way to do it is a full solution anneal. Then if your cooling is uneven you will reintroduce high stress.
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Plymouth Tube
RE: Post Weld Stress Relieving of 310SS
a full solution anneal will probably nullify your Code WPS