Aluminium bronze is a copper-based alloy typically containing 5 to 12 % aluminium. This material group is known for its excellent combination of mechanical strength, corrosion resistance, and wear resistance. The aluminium content contributes to the formation of a dense, protective oxide layer, which enhances its durability in demanding environments.
Key properties
- High strength and hardness – Aluminium bronzes are significantly stronger than pure copper and many other copper alloys, making them suitable for high-stress components.
- Outstanding corrosion resistance – Especially effective in seawater, industrial atmospheres, and a wide range of chemicals.
- Good sliding and wear behavior – Even under harsh conditions such as saltwater exposure, abrasive environments, or elevated temperatures.
- Low magnetic permeability – Ideal for applications requiring non-magnetic materials.
- Excellent thermal stability – Mechanical properties are retained even at elevated operating temperatures.
Typical applications
- Marine engineering: Propellers, pump impellers, valves, shaft sleeves
- Aerospace industry: Bushings, fasteners, structural components
- Chemical and petrochemical sectors: Fittings, pump components, sealing systems
- Mechanical and plant engineering: Gears, guides, plain bearings
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