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Re: [MW:35985] P5A to P8

By Materials & Welding

As per ASME Section IX, welder qualification for a dissimilar weld (P5A → P8) performed using F-No. 43 filler cannot be done on 

P5A → P5A materials alone. The test coupon must include at least one P8 base metal to represent the metallurgical condition of 

the production weld. Therefore WQT must be performed on a CS + SS test coupon. CS + CS coupon with F43 is not acceptable under

ASME IX.

Sridhar.


On Tue, 3 Feb 2026 at 13:20, Aslam Khan <akchillu@gmail.com> wrote:
I have scenario in site, we have to qualify welders for cs to ss,but we dont have ss material available ,can we do with cs alone using f43 filler wire. wps- p5a to p8- f.no-43
Wqt - p5a to p5a- f.no-43

Thanks&regards

Aslam 


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