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I am getting confusion in welder q

I am getting confusion in welder q

I am getting confusion in welder q

(OP)
I am getting confusion in welder qualification certificate
PROCESS- GMAW
WELDING BASE METAL- P1 TO P1 - Range Qualified - P1 thru P11, P34,P4X
TEST COUPON = 0.375 "
WELDER IS QUALIFIED - 1/16" TO 0.750" AS PER QW 451.1
My understanding
welder is qualified only on GMAW Process & He Qualified joining P1 TO P11 GROUP BUT NOT P8 TO P8.
please clarify.
regards

RE: I am getting confusion in welder q

Why do you think the welder would not be qualified?

RE: I am getting confusion in welder q

(OP)
thanks for reply
my understanding
joining base metal is P1 TO P1 - QUALIFIED RANGE P1 TO ANY GROUP BETWEEN ( P1 TO P8) P4X, P34.
QW-423.1- When a base metal shown in the left column is used for welder qualification, the welder is qualified to weld all combinations of base
metals are shown in the right column.

P-No. 1 through P-No.15F-- Qualified Production Base Metals P-No. 1 through P-No.15F, so he can weld any combination.

& WELDING OF CARBON STEEL IS EASY THAN WELDING STAINLESS.
While waiting for the carbon steel to reach weld temperature, the stainless can overheat and become riddled with hot cracks.

Regards

RE: I am getting confusion in welder q

That is why you have a WPS that has a maximum interpass temperature limit. Not overheating the weld/base metal is not testing the skill of the welder other than to follow instructions. Per ASME Section IX, the welder would be qualified for P8 since it is between 1 and 15F. The F-number of the electrode may be another matter depending on what process you are using.

RE: I am getting confusion in welder q

(OP)
Thanks for reply
so you are saying
p1 to p1 - welder qualified p8 to p8. P3 TO P3, P5 TO P5 ETC.

RE: I am getting confusion in welder q

Yes, and P1 to P8 and P3 to P5, etc. Welder skill is more related to the filler metal than the base metal.

RE: I am getting confusion in welder q

(OP)
Thanks
i was getting confusion the wording weld all combinations of base
Thanks

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