Stainless Steel Mig Gas

Shielding gas selection is critical to the successful joining of stainless steels.

Stainless steel mig gas. In mig welding the continuous wire electrode is automatically fed to the welding torch at a user defined speed. Butt lap and single fillet welds in material ranging from 0 60 in. In most ferritic and austenitic stainless steel welding applications argon co 2 blends can help improve productivity and performance especially if conventional and pulsed spray transfer techniques are used. Want to weld stainless steel without any shielding gas.

Therefore you do not want to use a completely inert shielding gas such as 100 helium or 100 argon for stainless steel mig welding. With both these stainless steel gas mixes the minor gases in the blend are required to provide good arc starting characteristics. In some cases there is tri mix shielding gas containing 90 helium 7 5 argon and 2 5 carbon dioxide. Welding of stainless steel is typically done with c2 or 2 carbon dioxide and 98 argon.

Mig or metal inert gas welding otherwise known as gas metal arc welding gmaw is one of the most popular and widely used arc welding processes for joining stainless steel and other metals. This is the gas that will duly protect our work from all sorts of atmospheric contamination. 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. In some cases there is tri mix shielding gas containing 90 helium 7 5 argon and 2 5 carbon dioxide.

In 321 310 316 347 304 410 and similar stainless steels can be successfully made. Mig welding gas for stainless steel welding. Carbon steel mig weld done with c25 gas. 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.

Besides if you re planning to mig weld stainless steel the best shielding gas you can use would be 2 5 of carbon dioxide 7 5 argon with a 90 helium combination. Short circuiting transfer welds on stainless steel made with a shielding gas of 90 he 7 1 2 a 2 1 2 co2 show good corrosion resistance and coalescence. Alternative gases that you can use are 98 argon and 2 co2 or 98 argon and 2 oxygen mix. The arc characterisitcs would be poor.

Mode of metal transfer.