C54400 - Copper Alloys

A wrought gun metal CuSn4Pb4Zn3 which meets the requirements of ASTM B 139 C54400 alloy B2. The alloy is normally manufactured in hard temper, which produces particularly high tensile properties. With the addition of lead the alloy is free machining compared with the straight tin bronzes and is used in a wide variety of high demanding bearing applications. Due to the presence of 4% lead, C54400 possess an extent of self-lubrication, which will be an advantage in applications with difficult access for lubrication.

Equivalent Specifications

ASTM B139 C54400
ASTM B103 C54400
SAE J461
SAE J463

Key Features

A low cost bearing bronze which is free cutting, has good cold working properties and is suitable for blanking, forming and bending.

The tin helps to improve the corrosion resistance and the phosphorus enhances the bearing and wear resistance. The alloy can be produced with a fine grain structure and high fatigue properties.

Typical Uses

General engineering: The combination of high tensile and good ductility combined with excellent corrosion resistance makes this alloy ideal for fasteners.

Additional applications include, spring washers,corrosion resistant bellows, sleeve bearings and thrust washers.

Description	Leaded Phosphor Bronze
Nominal Composition	CuSn4Pb4Zn4
Alloy Type	wrought

Typical Mechanical Properties

Tensile Strength (N/mm²)	470
Proof/Yield Strength (N/mm²)	385
Elongation (%)	20
Hardness Brinell	80
Impact Izod J20°C

Typical Physical Properties

Density g/cm³	8.89
Melting Temperature Range °C	920 - 1000
Thermal Conductivity W/mK	86.5
Electrical Resistivity μΩ.m15°C	9
Coefficient of Thermal Expansion 0-250°C	17.3
Relative Magnetic Permeability	1.01
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.