Equivalent Specifications



Key Features

A ductile aluminium bronze with excellent corrosion resistance; particularly good under crevice corrosion conditions.

Suitable for moderate strength applications running a low speeds with adequate lubrication.

Typical Uses

The alloy has low magnetic permeability properties compared with the nickel aluminium bronzes.
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BS1400 AB3

A silicon aluminium bronze alloy, with 6% aluminium and 2% silicon plus a small addition of iron for strength. The alloy has medium strength compared with AB1 and AB2 but has superior machinability. It meets the requirements of BS1400 AB3 CuAl6Si2Fe and has excellent corrosion resistance in sea water and holds its own in other corrosive environments. AB3 has low magnetic permeability, making it suitable for specialist military applications. AB3 is widely used for medium to heavy loads under slow moving conditions but needs adequate lubrication.

Description Aluminium Silicon Bronze
Nominal Composition CuAl6Si2Fe
Alloy Type Cast

Typical Mechanical Properties

Tensile Strength (N/mm²) 470
Proof/Yield Strength (N/mm²) 190
Elongation (%) 20
Hardness Brinell 120
Impact Izod J20°C

Typical Physical Properties

Density g/cm³ 7.7
Melting Temperature Range °C 1060-1070
Thermal Conductivity W/mK 45
Electrical Resistivity μΩ.m15°C 0.22
Coefficient of Thermal Expansion 0-250°C 18
Relative Magnetic Permeability 1.035
Coefficient of Friction

Copper Alloys Ltd has the ability to modify existing alloys for improved performance. Many customers have benefited from this in the past.

To discuss your requirements, call a member of Copper Alloys Ltd's technical team on +44 (0) 1782-816888, or email sales@copperalloys.net.

This Data is indicative only and must not be seen as a substitute for the full specification from which it is drawn. In particular, the mechanical property requirements vary widely with tempeter, product and product dimensions. The information is based on our present knowledge and is given in good faith. However, no liability will be acepted by the Company in respect of any action taken by any third party in reliance thereon.

As the products detailed may be used for a wide variety of purposes and as the Company has no control over their use; the Company specifically excludes all conditions or warranties expressed or implied by statute or otherwise as to dimensions, properties and/or fitness for any particular purpose.

Any advice given by the Company to any third party is given for that party's assistance only and without liability on the part of the Company. Any contract between the Company and a customer will be subject to the Company's Conditions of Sale. The extent of the Company's liabilities to any customer is clearly set out in those Conditions, a copy of which is available on request.