Welding Gas For Stainless Steel Mig. Formier gas N 2 5 - 12 H 2 is an excellent alternative for conventional austenitic steels. The shielding gas recommended for short-circuiting welding of stainless-steel contains 90 helium 75 argon and 25 carbon dioxide.
In some cases there is tri-mix shielding gas containing 90 Helium 75 Argon and 25Carbon dioxide. Ideal numbers are between 25 and 30 cubic foot-hours. Welding of stainless steel is typically done with C2 or 2 Carbon Dioxide and 98 Argon.
Even though most of the welding machine manufacturers have included a table of materials and voltage settings in the machine it is highly important for you to pick the right kind of gas and electrode wire to be used for MIG welding stainless steel.
Its the only gas that produces the right kind of electrical arc for stainless steel MIG welding with low Amps. Both CO2 and helium require higher voltages to sustain a stable arc and helium is the most expensive of the inert gases. A more affordable and common option for stainless steel is C2 which is composed of 98 percent argon to 2 percent carbon dioxide MIG Welding Gases nd. MIG Welding Gas for Stainless Steel Welding.