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What is Ferrite Testing in Stainless Steel Welds about?

The email thread discusses ferrite number (FN) requirements for stainless steel welds according to API RP 582. There is a question about whether the FN criteria applies to dissimilar metal welds involving stainless steel and carbon/low alloy steel given potential dilution issues. Jason Praster responds that in his opinion, the FN readings for such welds should be taken in the heat affected zone of the stainless steel, and that API 582 does not specify requirements for bimetallic welds. He has also asked API

Author

Anonymous UoHUag

Language

EN