aluminum filler alloy selection AlcoTec
The more magnesium an aluminum magnesium alloy contains, the less likely it is to crack thus, the high magnesium content fillers 5356, 5183, and 5556 are commonly used to weld both wrought and cast aluminum magnesium base alloys. The 6000 Series Alloys, which are heat treatable, all exhibit the same relative weldability.