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As per NACE MR0175, austenitic stainless steel weldments need to be solution annealed and quenched?

Question: I am requesting a clarification of intent for comments included in Tables A.2 and A.6 In both of these tables there is a statement “these materials shall also be in the solution-annealed and quenched condition.” It is my interpretation that this was a requirement for the base material and was not intended for a fabricated part, e.g., a welded compressor housing. We have to complete some fabrications and believe the required heat treatment will cause cracking and distortion of the part–however, a part must meet the requirements of MR0175/ISO 15156.

Answer:

You are correct. NACE MR0175/ISO 15156-3, Tables A.2 and A.6 apply to base materials only. The requirements for welding are given in NACE MR0175/ISO 15156-3, A.2.3, “Welding of austentitic stainless steels of this materials group.”

This question is in relation to NACE MR0175/ISO 15156-3 Table A.2

Reference: ISO 15156 Maintenance Panel Inquiry #2006-10

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