I have a WPQR for GMAW overlay welding, filler mat AWS/ASME SFA - 5.21 ERCCoCr-A and base material WCB. and I have welder qualifications of this WPQR. However, customer needs filler material to be AWS/ASME SFA - 5.21 ERCCoCr-E.
If every essetial variables are same and only change is the filler...