How To Weld Aluminum With Gas. Next set the optimal speed of the wire feed. But thinner than 14 gauge or 074 inch requires a little bit more tinkering and using specialized pulsed MIG or AC TIG welding equipment.
During World War II production-line aluminum welding of combat hardware like aircraft components was done using hydrogen and oxygen the same way oxygen and acetylene are widely used today to weld 4130. These gases are used as pure argon pure helium and various mixtures of both argon and helium. Because aluminum is a non-ferrous metal it requires a 100 percent argon shielding gas.
Consider a machine with an output greater than 200 amps if you will be welding aluminum daily.
Next set the optimal speed of the wire feed. You need to install one of the gears which are included in the no gas welder kit. The filler electrode should be scraped into the surface at three or four-second intervals with the rod coming clear off the flame each time. This is something many welders overlook.