The 2xxx-7xxx Families

MetalLearn® – Aluminum Products Aluminum Families and Alloys The 2xxx-7xxx Families

Alloy Family	Principal Alloying Element	Feature	Common Use
1xxx	None	99% minimum pure aluminum	Electrical conductor
2xxx	Copper	Very high strength	Aircraft
3xxx	Manganese	Strength, formability	Siding, ductwork, roofing
4xxx	Silicon	Joining	Welding products
5xxx	Magnesium	Corrosion resistance	Boats, marine applications
6xxx	Magnesium and Silicon	Strength	Structural shapes, pipe
7xxx	Zinc	Very high strength	Aircraft