An American continuous cast leaded gun metal CuSn6Zn4Pb2 also known as “Navy M”. This is a general purpose bearing alloy with added lead for machinability. It is suitable for low loaded components with adequate lubrication.The alloy can also be manufactured to SAE 622, SAE J461/J461, QQ-C-390 D4, QQ-B-1005 Comp 1, Mil-B-11553 Comp 1, Mil-B-16541 and JIS H5121 CAC407C Class 7.

Equivalent Specifications

BS EN 1982-2008 GC CC499K
CuSN5Zn5Pb2-C
ASTM B505 C92200
ASTM B271 C92200
ASTM B584 C92200
SAE J461
SAE 622

Key Features

Hard, strong, tough, resistant to wear, fine-grained. Good machinability and corrosion-resistant to sea water.

Typical Uses

Worm wheels, gears, bushings for heavy loads and low speeds. Good resistance to pounding.

Architecture: Ornamental Castings

Building: Heating Equipment, Cooling Equipment

Fasteners: Nuts

Industrial: Cryogenic Valves, Valves for Water Meters, Medium Pressure Hydraulic Equipment, Valve Components, Pumps Used to 288°C, Pump Impellers, Fittings Used to 288°c, Gears, Piston Rings, Bushings, Bearings

Marine: Castings

Plumbing: Medium Pressure Steam Equipment to 288°C

Description Leaded Tin Bronze
Nominal Composition CuSn6Zn4Pb2
Alloy Type cast

Typical Mechanical Properties

Tensile Strength (N/mm²) 270
Proof/Yield Strength (N/mm²) 140
Elongation (%) 18
Hardness Brinell 70
Impact Izod J20°C

Typical Physical Properties

Density g/cm³ 8.65
Melting Temperature Range °C 825 - 988
Thermal Conductivity W/mK
Electrical Resistivity μΩ.m15°C
Coefficient of Thermal Expansion 0-250°C
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