A cast gunmetal containing nickel for increase physical properties. Comprising of 7% tin, 5.5% nickel and 2% zinc, the alloy conforms to BS1400 G3 CuSn7Ni5Zn3 and has no know European equivalent. This alloy can be heat treated to give increased strength and hardness, which imparts excellent wear and abrasion resistance. The alloy does need good lubrication and is suitable for slow moving parts.

Key Features

Hard, strong, tough, resistant to wear, fine grained.

Good machinability and corrosion resistant to sea water. The addition of nickel increases the mechanical strength and corrosion resistance

Typical Uses

Worm wheels, gears, bushings for heavy loads and low speeds. Good resistance to pounding. Admiralty bronze suitable for marine pumps and valves. Plain bearing shells, moderately stressed slide and coupling components. Stern tubes.

Description Nickel Gunmetal
Nominal Composition CuSn7Ni5Zn3
Alloy Type cast

Typical Mechanical Properties

Tensile Strength (N/mm²) 350
Proof/Yield Strength (N/mm²) 180
Elongation (%) 20
Hardness Brinell 100
Impact Izod J20°C

Typical Physical Properties

Density g/cm³ 8.8
Melting Temperature Range °C 900 - 1020
Thermal Conductivity W/mK 47
Electrical Resistivity μΩ.m15°C
Coefficient of Thermal Expansion 0-250°C 18
Relative Magnetic Permeability
Coefficient of Friction

Copper Alloys 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’s technical team on +44 (0) 1782-816888, or email [email protected].

Contact

+44 (0) 1782 816888

[email protected]

Auckland Street, Stoke-on-Trent, ST6 2AZ, United Kingdom