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 |
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