Saturday, February 5, 2022

Re: [MW:32805] 98%Ar+2%O2 or 98%Ar+2%CO2

Dear Mr. Sankalp,

As per AWS 5,32 following shielding gases are used for various metals.

AWS SG- AO -2       -----   98 Ar + 2 % O2 is used for SS 

AWS SG- A              ----- 100 Ar  for Aluminum  (or) 
AWS SG- He A-25   -----   75 He + 25 %  Argon  for Aluminum  (or) 
AWS SG- AHe-10    -----   90 Ar  + 10 %  Helium for Aluminum.

AWS SG-C               ----- 100 CO2  for Carbon Steel  (or) 
AWS SG- AC-20      -----   80 Ar + 20 % CO2 for Carbon Steel   (or) 
AWS SG- ACO -8/2 -----   90 Ar + 8 CO2 + 2 % O2 for Carbon Steel.

Other mixture gas ratios are also available for CS but, above are generally recommended.

C Sridhar.
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On Friday, 4 February, 2022, 02:20:34 pm IST, S.Sankalp <sidd.sankalp@gmail.com> wrote:


Dear All,

Please comment on the weld metal properties of GMAW welded ASS with shielding gases 98%Ar+2%O2 and 98%Ar+2%CO2. How a shielding gas among these two will be selected.

Regards,
Sankalp

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