P # grouping weld question 1

[m3brunof]

Hey fellas,
If a welder is qualified using a P1 material base metal, is he also qualified to weld on P 45 material? If i'm reading QW-423.1 correctly he is. Thanks a bunch

 

[weldtek]

The short answer is yes. Filler ( F # )is an essential variable though.
For instance you can qualify a welder using F4x on P1 test plates to qualify him as a welder on P4x material.

 

[m3brunof]

Thanks a bunch weldtek! The welder is qualified with P1 to P1 with an F # 6 and the WPS for the P 45 material also requires a F # 6, so that's good. The weld procedures also shows the A #. The A numbers are different. QW-404.5 is not too clear on which numbers qualify for which numbers. Any thoughts on this?

 

[weldtek]

m3brunof,
I'm not sure which process your welder will be using, but, QW350 lists the essential variables for welder qualification for the common processes. I suggest you review those applicable to the process you have in mind.
You'll note that QW404.5 is not an essential variable for welder qualification.