How To Weld Aluminum With A Mig Welder. Yes although aluminum can be tricky to MIG weld it can be done. Pure Argon gas is needed to weld Aluminum with a Mig welder.
However there are some MIG welders out there that weld aluminum without a spool gun. The MIG welding I am going to describe in this instructable is for steel which uses a copper colored wire. It is safe to keep the flow rate 20 to 30 cubic feet per hour.
A spool gun is a better option than directly placing aluminum wire into the MIG machine because aluminum is too soft for the MIGs feed mechanism.
The Gas Tank Assuming you are using a shielding gas with your MIG welder there will be a tank of gas behind the MIG. Use an aluminum feeding kit to feed the electrodes and soft aluminum wire. Use a push technique when Aluminum welding with a MIG welder. A spool gun is a better option than directly placing aluminum wire into the MIG machine because aluminum is too soft for the MIGs feed mechanism.