Stainless Q&A

September 2023

Q: Our project requires welding ASTM A36 Carbon Steel to ASTM A240 Type 304 Stainless Steel. We want to ensure there is no cracking in the weld metal and have been told the appropriate filler metal to utilize is Type 309 Stainless Steel. Is this true, and do we need to be concerned about how much filler metal is used?

A: This question can be answered using the WRC-1992 Ferrite Number (FN) diagram, which was develop..

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