EN 1412 CuAl7Si2 CW302G - Copper Alloys

The European standard for a wrought Silicon Aluminium Bronze CuAl7Si2. The alloy has lower magnetic permeability then CW301G as it is iron free. It has moderate strength, is free machining, good corrosion resistance in sea water and does not suffer stress corrosion cracking. The alloy can be specified to EN 12163/12165/12420 and EN 12167 CW302G.

Equivalent Specifications

ASTM B 03 150 C64200
AMS 4631
AMS 4634
AMS 4631
AMS 4633
QQC 465 C64200
ASME SB 150 C64200
BS EN 12420 1999 CW 302G
BS EN 12165 1998 CW 302G

Key Features

A single phase silicon aluminium bronze with high ductility, good corrosion resistance and low magnetic permeability. It has good anti-galling and anti-seizure properties.

Typical Uses

Marine: Marine defence ship applications requiring low magnetic permeability, anchor chains, anchors, instrument housing, valve blocks and valve stems.

Automotive: Valve guides.

Fasteners: Nuts and bolts

Electrical Power: overhead connectors and hardware.

Industrial Valves: components and bodies, cams gears.

Description	Silicon Aluminium Bronze
Nominal Composition	CuAl7Si2
Alloy Type	wrought

Typical Mechanical Properties

Tensile Strength (N/mm²)	580
Proof/Yield Strength (N/mm²)	265
Elongation (%)	30
Hardness Brinell	120
Impact Izod J20°C

Typical Physical Properties

Density g/cm³	7.7
Melting Temperature Range °C	985 - 1005
Thermal Conductivity W/mK	45
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.