welder qualified

[stan000]

my welder is qualified to P1 TO P1, My understanding he also qualified to do welding on P10H TO P10H.
Please advice.
Regards
stan

 

[david339933]

Unfortunately Yes, assuming same F#. IMO it is ridiculous to think P10H will weld like P1 material.

 

Yes your welder's ticket may be valid, but duplex SS demands a lot more than just the ability to make a sound weld.
How corrosion-resistant do you want your finished P10H component to be?
I would do nothing less than qualify each of my welders with corrosion testing to ASTM A923.

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

 

[sharmass]

Stan3126
Both base metal P no and Filler Metal F no are essential variables for welder.
GTAW F no being 6 for both carbon steel and duplex consumables, you may use welder qualified on P1 to weld P10H
For SMAW F no is not same for carbon steel (F no. 4) and Duplex (F no. 5). In this case you may have to run his qualification tests.