Bolts resistant to hydrogen sulfide stress corrosion

2022-09-06View Original

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Heroes! I'm facing a situation where, in an environment with hydrogen sulfide, many of the bolts on the small floating heads of the coolers break. Could you recommend types of bolts that can resist stress corrosion caused by hydrogen sulfide?

Reply #22022-09-06

B7M bolt; I remember it should have an M at the end. When I have time, I’ll look up some information.

Reply #32022-09-06

Use stainless steel studs and nuts; if carbon steel studs and nuts are to be used, choose those made of carbon steel with a relatively low hardness

Reply #42022-09-06

Studs: SA-193 Gr.B7M, nuts: SA-194 Gr.2HM

Reply #52022-09-06

Take some photos of the corroded bolts; take a few more shots.

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Bolts resistant to hydrogen sulfide stress corrosion

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