Welding Gas For Mig Welding Stainless Steel. Alternative gases that you can use are 98 Argon and 2 Co2 or 98 argon and 2 oxygen mix. Resistance welding spot welding used for thin metal sheets in industrial production.
In some cases there is tri-mix shielding gas containing 90 Helium 75 Argon and 25Carbon dioxide. 90 Helium plus 75 Argon plus 25 Carbon dioxide. Helium He can be added to increase penetration and fluidity of the weld pool.
The typical gas pressure when welding with MIG tends to be around 3 to 8 psi this is very low compared to other types of welding.
90 Helium plus 75 Argon plus 25 Carbon dioxide. If youre keen on making a slower tighter weld go for a high argon based shield gas. 90 Helium plus 75 Argon plus 25 Carbon dioxide. While choosing the Shielding gas for MIG welding stainless steel welders usually prefer a mixture consisting of Argon 98 and CO2 2 while some prefer to use the gas mixture of Helium -90 Argon 7 and CO2 2.