Zecor to 316 SS

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Topic Welding Industry / Technical Discussions / Zecor to 316 SS

By azphiks (*)

Date 04-08-2011 15:15 Edited 04-08-2011 15:18

We are welding to B31.3 CAT D. The piping is Zecor - a type of SS designed to resist sulpuric acid. This filler metal SFA is unassigned. Our procedure allows us to weld Zecor parent material with Zecor-Z filler rod. However, the F-No. is F6. Can we weld Zecor to 316 SS? Not without another PQR IMOP. This is not a weld to the pressure envelope, I might add. A repad on the pipe is Zecor and the Shoe is 316. Any comments? Suggestions?

By James Kelly Date 04-17-2011 21:28

ZeCor is a nigh silicon austenitic. The exact chemistry is secret (until you sent a piece to a lab) You might want to contact envirochemsystems.com & see if they can provide guidance for this dissimilar metal weld.
High silicon (say, 5% or so) austenitics may not be a lot of fun to weld. You might want to run some trials.
Will the weld bead be exposed to sulphuric acid?

Topic Welding Industry / Technical Discussions / Zecor to 316 SS