Best Shielding Gas For Mig Welding Stainless Steel. Tri-Mix Gas 90 Helium 75 Argon and 25Carbon dioxide. The mixture provides benefits including an increased amperage for quicker welds without the undesired more extreme heat.
Another key part of this gas is that it produces minimum splatter which can be dangerous if it hits the skin MIG Welding. How-to Tips Optimize Shielding Gas Performance. Copper has an almost mystical property to it when you back up a weld.
The addition of helium to argon increases the available energy to the weld pool making it more fluid.
When you require extra-low carbon content in the weld use argon with 1 to 2 percent oxygen. Basic shielding gas choices for Stainless are. Reasons To Use C25 Shielding Gas When MIG Welding Mild Steel. Copper removes heat and traps a small amount of shielding gas and makes the weld much prettier on the back than without anything.