What Shielding Gas For Mig Welding Aluminum. Flow rates of 20 to 30 cubic feet per hour are recommended. Inert gas is used for MIG welding or metal inert gas welding use inert gas as a shielding gas.
TIG welding the wire is separate from the shielding gas and you have to use a different gas cylinder. Shielding gas protects the melting metals from being exposed to outside gases by using a steady stream of a different type of gas. When you require extra-low carbon content in the weld use argon with 1 to 2 percent oxygen.
MIG Welding Aluminum Gas Choice.
When it comes to gas choices for aluminum welding there are differences from when working on mild steel. CO2 is much cheaper than inert gas and it allows the bond to penetrate very deeply into the metal when welding. A 7525 MIG Argon and CO2 mix is the most popular gas for MIG welding sales making up more than 90 of the gas we sell at Vern Lewis Welding Supply. Argon mixed with 2 to 5 percent CO 2 is the norm.