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Letter 21615
304SS with H2S
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Hello all,
I wish to know if 304SS is compatible with H2S in a normal range
of <100 DegC. I do not know the actual content nor concentration
of H2S in process application. Thank you in advance for your
comments.
Jerri N.
- London, England
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300 series stainless steels are know to stress crack when exposed
to sulfides.
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It depends upon a lot of things, of course. Is the H2S an impurity
or part of the product that you are housing in the 304ss? If it is an
impurity it may be possible to put something in the tank to drop out
the sulfide as a solid precipitate without affecting your process.
Small concentrations may not be a problem. How long is the process
going before you do PM? Is this a tank or vessel of some kind? Make
sure it is diked.
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