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English Translations » 【化工工程交流】 » What is the reason why the heat-affected zone of stainless s

What is the reason why the heat-affected zone of stainless steel welded pipes turns black after pickling?

2019-08-28View Original

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This post was last edited by flybeyond on 2019-8-28 16:08. As shown in the picture, the stainless steel pipe was pickled after welding, and the heat-affected zone near the tee turned black. What is the reason for this?
Reply #22019-09-02
Too much pickling. . . . . . .
Reply #32019-09-03
Well, I thought it was possible at first. But there is still a question, why is it that only the side facing the tee turns black, while the other side has no problem?
Reply #42019-09-03
The material composition and rolling conditions of tees and pipes are still different.

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Translated at 2026-07-26 14:21:05

Original: https://bbs.hcbbs.com/thread-2771942-1-1.html

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