Gas For Welding Aluminum With Spool Gun. Spool guns that are designed for aluminum wire eliminate some of the challenges aluminum welders face. What kind of gas Should I use to weld aluminum with a spool gun attached to a welder.
Anything else unless it is thick as hell will contaminate your weld. So if youre working in close spaces or on larger projects you may prefer to use a smaller lighter MIG torch fed from a larger spool. The best gas for MIG welding aluminum is 100 argon.
This process is a very smooth transfer of molten metal droplets from the end of the electrode to the molten pool.
What process should you use. Aluminum wire is much softer than steel and a spool gun helps in compensating for its softness. The wire is 4043 argon gas the base metal is unknown it tig welds fine. Slightly too much wire feed speed and the arc is not smooth.