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Re: [MW:32438] GMAW change gas from 100 %CO to Ar+5%O2

By Materials & Welding

Below table can help you
Best regards

Saeed Sarir
IKA Technical Inspector
Phone number : +98 09132387465

Thank you for thinking of the environment before printing this email.  
One tree can start a forest.



On Mon, Apr 12, 2021 at 4:37 PM Ramin Kondori <raminkondori@gmail.com> wrote:
If the reason for changing the shielding gas has only been the issue of excessive fumes, I recommend you to switch back to CO2.
It's mild steel and unless it is necessary, the CO2 gas will do the trick.
It is not economically feasible to use Argon.

Kind regards
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
                        
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On Mon, Apr 12, 2021 at 9:25 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
                        
IIW-Logo-Colour-small


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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