Dear Chiranjeevi for this 304L / 316L weld, a qualified WPS should have been used where the filler material was superior metallurgy for the joint. In this case, use type 316L filler material to achieve adequate Mo content as protection against intergranular corrosion by chlorides, for example.
Sorry, I think you're going to have to cut those 20 welds made with 308L.
In all Codes and Standards, good welding practices indicate the correct combination.
Regards,
Ramon Briceno
Metallurgical Engineer.
Amon
Sent from Mail for Windows 10
From: Chiranjeevi A
Sent: Saturday, May 8, 2021 12:09 AM
To: materials-welding@googlegroups.com
Subject: [MW:32355] filler material between 304L and 316L
Dear Experts,
At the site 308L filler wire used for the Pipe joint between 304L and 316L. After doing the PMI QC rejected the joints and suggesting to use 316 filler.
Experts kindly share the details of the code reference to accept or any procedure to avoid cutting 20joints.
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