MIG Welding Wire, 4043 Aluminum, 0.035" Diameter, 1 lb Spool

The shielding gases that are commonly used in MIG welding are argon, carbon dioxide, oxygen, and a special mixture of gases with helium. The shielding gases used to weld different metals are also different. Washington Alloy 4043 (commonly referred to as AISi5) is a 5% silicon aluminum filler metal that is available for MIG or TIG welding processes.