CW111C - Copper Alloys

A European copper alloy forging standard for CuNi2Si CW111C. A copper nickel silicon alloy, specially developed to provide a unique blend of mechanical and physical properties for high performance engineering. It is a precipitation hardened, multipurpose alloy exhibiting high strength characteristics, together with excellent wear properties whilst still retaining high electrical and heat conductivity properties. The superb strength characteristics are derived from a finely dispersed precipitate of Ni2Si developed from a closely controlled manufacturing process.The alloy can also be manufactured to EN 1652/12167/12165/12163 CW111C, ASTM B 411 C64700 and DIN 17672-1 W Nr 2.0855.

Equivalent Specifications

BS EN 1652 1998 CW 111C
BS EN 12165 1998 CW 111C
BS EN 12420 1999 CW 111C
BS EN 12163 2011 CW 111C
DIN 17666 2.0855
DIN 17672 2.0855
ASTM B411 C647000
NFL 14-701
DTD 498
RWMA Class 3
ISO 1187

Key Features

A copper alloy containing nickel and silicon, that can be strengthened by heat treatment. Material solution heat treated at high temperature has a soft supersaturated alpha-phase structure, and subsequent precipitation hardening at lower temperature precipitates finely dispersed nickel silicide in the matrix. In this condition, the alloy exhibits high strength and hardness, combined with good wear resistance and conductivity. Cold working before precipitation hardening can further improve strength and hardness. The alloy has a good corrosion resistance in a variety of environments.

Typical Uses

A high copper alloy with extremely good electrical and heat conductivity that is strengthened by heat treatment and cold work.

Has good corrosion resistance and ductility.

Electrical

The alloy is used mainly for fasteners. In the electrical industry it is used for switch gear and circuit breakers

Description	Copper Nickel Silicon
Nominal Composition	CuNi2Si
Alloy Type	wrought

Typical Mechanical Properties

Tensile Strength (N/mm²)	490
Proof/Yield Strength (N/mm²)	340
Elongation (%)	12
Hardness Brinell	160
Impact Izod J20°C

Typical Physical Properties

Density g/cm³	8.8
Melting Temperature Range °C	1040 - 1060
Thermal Conductivity W/mK	20
Electrical Resistivity μΩ.m15°C	5.8
Coefficient of Thermal Expansion 0-250°C	16
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.