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Aluminium BronzeAluminium Bronze

Offering the highest strength of copper based alloys

Aluminium bronze (copper-aluminium alloy) offers the highest strength of the copper based alloys with aluminium being the primary alloying element (typically 5 – 11% aluminium). It is also the most tarnish resistant of all the copper alloys – the appearance of the material does not deteriorate when exposed to the effects of atmospheric corrosion.

Excellent Corrosion Resistance

The alloy offers excellent corrosion resistance in a wide range of environments and is particularly effective in subsea applications. Whilst no engineering alloy can lay claim to being immune from the effects of corrosion, aluminium bronzes naturally form an alumina type protective film which acts as a highly effective barrier.

Key features:

  • Excellent corrosion resistance
  • Very resistant to seawater corrosion
  • Tarnish resistant
  • Higher strength than standard copper alloys
  • High resistance to cavitation damage

Aluminium bronze is used in a variety of applications. The alloy offers outstanding performance in marine and subsea environments and is used in the manufacture of propellers and underwater fastenings. In the oil and gas sector, aluminium bronze is used in the production of inert gas fans for oil tankers. It is also used to make bearing bushes for aircraft frames and also made use of in the production of bearings, valve spindles and pump shafts. Other examples of use include impellers and high duty pumps.

All aluminium bronzes benefit from good corrosion resistance but the level of this resistance is dictated by the particular alloy’s metallurgical structure.

Smiths Metal Centres offer a selection of aluminium bronzes which are available from stock with grades including AB2, B23, C63000, C63200 and DEF STAN 02-833 (NES833).

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