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High strength bolt material good for sub-sea service?

High strength bolt material good for sub-sea service?

High strength bolt material good for sub-sea service?

(OP)
Anyone have any experience with using SA-354 or SA-540 bolts for subsea P/L service?  Would chloride stress cracking, cad plating, saltwater, or brittleness be an issue?  We are looking for an alternative to a 193-B7 stud, we need 29-30 ksi allowable, 3 1/2" Dia.

RE: High strength bolt material good for sub-sea service?

I have used ASTM A193-B7M stud bolts on subsea valve flanges without problem.  However these were coated with a PTFE/Xylan type coating.

Hope this is of use.

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