Re: [MW:32212] GMAW change gas from 100 %CO to Ar+5%O2

Why did you change the shielding gas...?

Ramin  Kondori

Sr. QA/QC & Welding Engineer

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PG-Dip. in Welding Engineering (IWE  AT  0070)

BSc. in Civil Engineering (IUT)

BGAS Painting Inspector

ASNT Level I&II

                        

On Fri, Apr 9, 2021 at 5:03 PM EmaD FaRaHanI <emad.farahani@gmail.com> wrote:

Dear all,

I faced a problem with penetration in fillet welds when decide to change the gas type, as mentioned.

Most welders are doing well with this change, but some make loser penetration.

Details: mild steel, 2F welding position, wire feed speed 450ipm (optimized), 10˚ push angle, 

What could be the reason?  

Thanks,

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