Hi Rusabh,
There's something wrong in the selection procedure of welding electrodes. What you mentioned, i.e. use of Inconel welding electrodes applies for DMW between Grade-91 and Austenitic S.S.
If you buttering with Inconel-182, thereafter welding with B9 and B3 welding electrode, it'll create nothing but complex welding metallurgy. NOTE ONE SHOULD NOT WELD ON AUSTENITIC ALLOYS, WITH FERRITIC ELECTRODES. Just check the composition from the basic rules of dilutions. The reverse (using austenitic electrode on ferric steel) will work.
This welding could be easily done by using B3 or B9 welding electrodes , and butt welding P22 to P-91 steel.
Thanks
Pradip Goswami, P.Eng,IWE
Welding & Metallurgical Engineer/Specialist
Ontario, Canada
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of RUSHABH PANJABI
Sent: Sunday, May 10, 2015 10:24 AM
To: materials-welding@googlegroups.com
Subject: [MW:23260] Dissimilar Joint between P22(2.25Cr-1Mo) to P91( 9Cr-1Mo-V)
Hello,For dissimilar welding between P22 to P91, i have used Inconel 182 electrode.is it correct electrode.I have also tried buttering of inconel 182 on P22 and P91 and balance welding with B9 and B3.Then PWHT at 740 for 3 hours.. With buttering Side bend specimen fails adjecent to buttering in weld.. what can be reason for it?
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