Aluminum alloys with real densities

Commercially pure aluminum with excellent corrosion resistance and thermal conductivity. Soft and ductile — not a structural alloy.

High-strength copper alloy widely used in aerospace. Density is ~2.78 g/cm³ — about 3% heavier than the generic 2.70 assumption.

Work-hardenable manganese alloy with good formability and corrosion resistance. Common for sheet metal and tanks.

Magnesium alloy with excellent corrosion resistance. Density ~2.68 g/cm³ — lighter than the 2.70 rule of thumb.

Premier marine alloy. Density ~2.66 g/cm³ means a 2.70 assumption overestimates weight by ~1.5%. Excellent weldability.

European Al-Mg alloy popular for welded and formed structures. Good corrosion resistance with moderate strength.

Common European extrusion alloy for architectural profiles. Density near 2.70 g/cm³ — the rare case where the rule of thumb is acceptable.

The most common general-purpose structural aluminum. Balanced strength, weldability, and machinability. Density 2.70 g/cm³.

Best-in-class extrudability and surface finish. Preferred for architectural profiles and anodizing. Density ~2.70 g/cm³.

Higher-strength European 6xxx structural alloy. Often chosen over 6061 for heavy structural sections in EN markets.

Very high strength zinc alloy. Density ~2.81 g/cm³ — a 2.70 assumption underestimates weight by ~4%. Do not weld for structural joints.

Weldable 7xxx family option with higher strength than 6xxx. Density ~2.78 g/cm³.