Shielding Gas For Stainless Steel Mig Welding. An important factor or the most important when choosing the correct shielding gas mix is that stainless steel has a sluggish weld bead. MIG welding stainless steel with an Argon gas mix needs a shielding gas with a minimum of 5 to 2 of Oxygen gas in the shielding gas mix.
There are many types of shielding gas that can be purchased such as. This is keeping in mind if the gas which has been selected is composed of helium mixed with a little bit of CO2 and 20 argon. In some cases there is tri-mix shielding gas containing 90 Helium 75 Argon and 25Carbon dioxide.
Shielding gas protection Shielding gases for MIGGMAW welding.
The tri-mix shielding gas that has been brought up is the most suitable choice for MIG welding stainless steel. Although the gas flow rate will depend on a lot of factors as I have explained before the preferred range for working on stainless steel is around 20 to 25 CFH. Each of these gases has its pros and cons. Again many welding supply stores carry their own mixture that can improve the weld quality and ease of welding on stainless steel.