Re: [MW:32228] GMAW change gas from 100 %CO to Ar+5%O2

but u will get better penetration than mixture gas due to burried arc ( Repelled), and same u get more spatter, rough bead etc.

THANKS & BEST REGARDS,

KG.PANDITHAN, BE, IWE,  CSWIP 3.1,

ISO 9712 Level 2 in VT,

ASNT-Level II in PT,MT,RT & UT,

LA ISO 9001-2015,

International Welding Engineer. 

CONSULTANT-WELDING & QUALITY

Mobile no: +919940739349

On Mon, Apr 12, 2021 at 10:25 AM EmaD FaRaHanI <emad.farahani@gmail.com> wrote:

Thanks Dear Ramin,

Because of lots of fume due to CO2

On Sun, Apr 11, 2021 at 10:52 AM Ramin Kondori <raminkondori@gmail.com> wrote:

Why did you change the shielding gas...?

Ramin  Kondori

Sr. QA/QC & Welding Engineer

-----------------------------------------------------------

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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