Stainless Steel Mig Gases

Tri mix gas 90 helium 7 5 argon and 2 5 carbon dioxide.

Stainless steel mig gases. For stainless steels there are also gases available containing small amounts of hydrogen h2. Another acceptable shielding gas mix for short circuit stainless steel mig welding is 98 ar 2 o2 or an equivalent 98 ar 2 co2. The chosen gas blend typically depends on the welding position and operating conditions. Mig welding gas for stainless steel welding welding of stainless steel is typically done with c2 or 2 carbon dioxide and 98 argon.

The shielding gas recommended for short circuiting welding of stainless steel contains 90 helium 7 5 argon and 2 5 carbon dioxide. Welding of stainless steel is typically done with mixture of argon and carbon dioxide gasses that can be as low as 2 carbon dioxide to as high as 25 carbon dioxide. For austenitic stainless steels the choice is either 100 percent co 2 or 75 percent argon 25 percent co 2. C2 2 carbon dioxide or co2 and 98 argon.

Alternative gases that you can use are 98 argon and 2 co2 or 98 argon and 2 oxygen mix. The slag covering on the weld limits carbon absorption so shielding gases with high co 2 content can be used. In some cases there is tri mix shielding gas containing 90 helium 7 5 argon and 2 5 carbon dioxide. 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.

The typical shielding gases used in stainless steel mig welding include the following. The table indicates the appropriate choice of shielding gas for mig mag welding taking account of different types of stainless steel and arc types. In some cases there is tri mix shielding gas containing 90 helium 7 5 argon and 2 5 carbon dioxide. This latter mix produces a colder weld than the helium tri mix and therefore the molten weld puddle does not wet out as well.