Aluminum alloy profiles are classified according to alloy series.

- 1*** series (pure aluminum): Excellent conductivity (e.g. 1060), corrosion-resistant, low in strength, commonly used in power and chemical equipment.
- 2*** series (aluminum-copper alloy): High strength (e.g. 2024), but poor corrosion resistance, used in aerospace structural components.
- 6*** series (aluminum-magnesium-silicon alloy): Excellent comprehensive performance (e.g. 6061, 6063), heat-treatable for strengthening, widely used in construction and machinery.
- 7*** series (aluminum-zinc-magnesium alloy): Ultra-high strength (e.g. 7075), used in aerospace and military.