Correct Gas For Mig Welding Aluminum. For ½ inch nozzles your typical flow setting should be around 22-27 CFH. Before you can mig weld aluminum make sure you have a machine with an output greater than 200 amps and a shielding gas of pure argon.
Pure argon is the most popular shielding gas and is often used for both gas metal arc and gas tungsten arc welding of aluminum. MIG weld gas mix myths eliminated. Gas metal arc welding GMAW commonly referred to as metal inert gas MIG welding is another common method used for aluminum welding.
What process should you use.
Gases Used for Gas Metal Arc Welding Welding Gas is the main component in MIG Metal Inert Gas welding as these inert gases wont react with the welding bead where non-inert gases like oxygen can react with outside air and cause the bead to become highly porosity. Do you require shielding gas to MIG weld. Flow rates of 20 to 30 cubic feet per hour are recommended. There are basically two gases that are suitable for aluminum welding.