Equivalent Specifications

ASTM B139 C51000
ASTM B103 C51000
ASTM B100 C51000
AMS 4625
ASTM F 468
AMS 4510
SAE J461
> SAE J463
CW450K

Key Features

A single alpha phase copper tin alloy with a small addition of phosphorus.

The alloy offers a good combination of cold working properties, strength and hardness. It has good resistance to corrosion, including stress corrosion.

Typical Uses

Architectural: masonry fittings.

Electrical: springs, clips, switch components and contacts.

Mechanical: cold headed screws, rivets, bolts, nuts, washers and cotter pins.

Bearing and expansion plates for bridges and other structural applications.

 		Tel +44 (0) 1782-816888  
Email sales@copperalloys.net
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C51000

A forged 5% tin bronze which conforms to ASTM B 139 C51000 Alloy A and AMS 4625 . The alloy can be manufactured in a range of different combinations of ductility and strength including the hard temper, which produces high tensile strength and good fatigue properties whilst retaining good ductility. C51000 has good corrosion properties and can be used in high load bearing applications when adequately lubricated.

Description Phosphor Bronze
Nominal Composition CuSn5P 
Alloy Type Wrought

Typical Mechanical Properties

Tensile Strength (N/mm²) 485
Proof/Yield Strength (N/mm²) 400 (0.5%)
Elongation (%) 25
Hardness RB 78
Impact Izod J20°C  

Typical Physical Properties

Density g/cm³ 8.86
Melting Temperature Range °C 950-1050
Thermal Conductivity W/mK 69
Electrical Resistivity μΩ.m15°C 11.5
Coefficient of Thermal Expansion 0-250°C 17.8
Relative Magnetic Permeability < 1.01
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.