The most commonly used MIG aluminum welding wires are ER4043 and ER5356. ER4043 is a general-purpose MIG welding wire used to weld 2014, 3003, 3004, 4043, 5052, 6061, 6062, and 6063 aluminum alloys. The welds provide high ductility and excellent resistance to cracking.

Can you weld aluminum with regular MIG wire?

Material thickness: Most reputable MIG machines can be used to weld aluminium down to 3mm thickness. To successfully weld materials thinner than 3mm, it may be neccessary to use specialist MIG or TIG welders with pulse capability. (Note: to TIG weld aluminium, you will need an "AC/DC" machine such as the 202T).