[MW:10424] Welder's qualification for diffrent steels and steel alloys.

Dear Experts,

As per ASME sec.IX- QW423.1 mentioning Base metals for  welder qualification and also mentioning qualified production base metals against that.

Like; P-or S-No.1through P -or S- No.11,P- or S-No. 34,and P- or S-No.41 through P- S-No.49 and against that  same grouping and range of P- or S-No. mentioned for qualified production base metals.

That means if a welder qualified with as for example in CS(P no-1) welding(GTAW or SMAW any one ) with preheating and PWHT welding parameters,he can qualified with Low alloy steel like (P.No.4 or other in low alloy steel).

I have been questioned by our Inspection experts and I don't have answer other than mentioned in QW401.2"essential variable"(Performance).

Thanks & Rgds.
 
Narendra Gohil
Welding Engineer
QAFCO
Ph.+974-44228289(O)

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