CC493K - Copper Alloys

A continuous cast leaded tin bronze conforming to BS EN 1982-2008 CC493K CuSn7Zn4Pb7. This alloy is considered the standard bearing material for light duty applications.The lead aids machinability, the bronze alloy is hard, strong and resistant to wear. It also conforms well to journal irregularities and is less dependent on lubrication than other alloys. The alloy has reasonable corrosion resistance to seawater and brine. It can be manufactured to ASTM B 505 C93200, SAE J461/J462, QQ-C-390B E7, Mil-B-11553 Comp12, Mil-B-15345 Comp12, DIN 1705 W Nr 2.1090.03, Rg7, NF A 53-707 CuSn7Pb6Zn4 Y70 and AS 1565 C93200.

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	Leaded Gunmetal
Nominal Composition	CuSn7Zn4Pb7
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].

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 accepted 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.