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Hydrogen Embrittlement with stainless steel




I would like to know if there will be any compatibility issue with Hydrogen Gas embrittlement when using 316 and 17-4 stainless steel? The reason for two material is because one portion is 316SS and the other is 17-4SS. Both these materials will be welded together. So my real concern with embrittlement is in the welded area. Please advise if there should be any concern. Thank you.

Dan Badillo
Barksdale - Los Angeles, California, USA
2003



Type 316 stainless steel alloy is not prone to hydrogen embrittlement. Precipitation hardening grades like 17-4PH are susceptible to hydrogen embrittlement, especially in the hardened condition.
There are a number of standards and specifications that provide details on embrittlement relief,
e.g. ASTM B850-98, SAE USCAR 5, and ISO DIS 9588.

Toby Padfield
- Michigan
2003




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