Re: [MW:32227] GMAW change gas from 100 %CO to Ar+5%O2

this gas mix will be axial spray which is more penetration . if u face this issue only with some welders and others is OK , this may related to more welders training is needed . U can cut macro from one good welder and one u r doubted " using same parameters " then compare  

Best Regards ,

Ahmed Osman

On Friday, April 9, 2021, 03:33:25 p.m. GMT+3, 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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