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[MW:8939] Dissimilar welding filler wire 309LMo

By Materials & Welding
Dear All,
 
I need a clarification from u.
 
For dissimilar material ie. P1 and P8 ( 312 TP 316L) as per DGS recommends 309LMo. But the PQR qualifies only in 309L for dissimilar. There are no change in F number, P number, SFA number. But only Mo content. In 316L, 2% of Mo. But in filler of 309L only 0.75% of Moly. As in DGS specifically mentioned 309LMo for dissimilar for those category, can we use the same WPS or new PQR to qualify.
 
Need any separate procedure or no need?
 
Plz clarify.
 
Regards
 
arvinda
 
 

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