Purge Gas For SMAW

[nabeel3]

Dear All

I am trying to develop a WPS for Super duplex UNS32750 Tube material, Sch 40, One and a Half inch size. Using Electrode E2594-16 is it required to use purge gas? . Process SMAW. Data sheet attached

 

[kingnero]

Yes

 

[EdStainless]

Pure Ar for pure and backing gases.
You could use Ar+2%N2 for weld gas if you wanted to.

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P.E. Metallurgy, consulting work welcomed