WPQ range qualified question ASME IX

[PFQC]

Hello, all;
I'm looking for the definitive answer for which metals can be welded in the following case. A welder passes a SMAW-GTAW test on P-1 to P-1. The range qualified shows up as P1-P11,P34, P4x on the QW483 form.

I have several people who think this test qualifies the welder to weld inconel which is P-43. I disagree with their statement, since the P number is an essential variable in IX. There is some confusion due to the range mentioned above. It seems to me a separate test is required for inconel / Hastelloy, etc.

What say you all?

 

[ijzer]

Your interpretation is not quit correct. P1 to P1 also qualifies P41 through P49. See par QW-423.1.
It will however also depend on the F number of the rod used for qualification.
A welder qualification made on P1 to P1 welded with CS filler (e.g. F4) would in theory be qualified for welding Inconel with a CS weld rod , which is of couse non-sence.
A welder qualification made on P1 to P1 using F45 filler would however be qualified to weld inconel with F45 rods.

 

[weldtek]

The essential variables for welder qualification can be found in QW-350. As ijzer says, in your case, F# will be the limiting variable. This rule allows a fabricator to qualify a welder using an Inconel or Hastelloy filler, on carbon steel base metal, saving cost and trouble.

 

[PFQC]

Okay, I understand. The F number is the limiting variable. The P1-P11, P34, P4x confuses the issue when just speaking of P numbers.

I explained it badly in my original post. What I was disagreeing with is inconel being welded by a welder who didn't take an Inconel test, F43, just a test using F6 / F4 welding material.

Thank you both for your helpful posts, I appreciate it.