CW106C - Copper Alloys

A European copper alloy forging standard for CuCr1Zr CW106C which is a high copper alloy containing a small amount of chromium & zirconium that improve its mechanical performance. Copper on its own has outstanding electrical and heat transfer properties but is soft and ductile. However the small additions of these elements followed by a suitable heat treatment significantly increases strength and hardness while retaining high conductivity values. The alloy can also be manufactured to the following specifications EN 12167/12165/12163 CW106C, BS 2872/2874 CC102 and DIN 17672/17673/17678-1 W Nr 2.1293.

Equivalent Specifications

BS EN 12420 1999 CW106C
BS EN 12165 1998 CW 106C
BS EN 12163 2011 CW 106C
DIN 17665 2.1293
DIN 17672 2.1293
DIN 44759
ASTM B C18150
RWMA Class 11
MIL 19311
NFA 82100

Key Features

A high copper alloy with small additions of chromium and zirconium, that can be heat treated by quench and precipitation hardening.The addition of Zirconium helps prevent electrode sticking during the spot welding of galvanised steel.

Typical Uses

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

Electrical

The main applications are for electrical connectors,switch gear and circuit breakers which require higher mechanical properties.It is also used in generators for commutor bars and end rings for electric motors.

Mechanical/Electrical

Used for welding wheels,spotwelding electrodes.seam welding wheels and tips.Electrode holders and arms; oxygen jet tips. Moulds inserts for non ferrous casting moulds

Description	Copper Chromium Zirconium Bronze
Nominal Composition	CuCr1Zr
Alloy Type	wrought

Typical Mechanical Properties

Tensile Strength (N/mm²)	380
Proof/Yield Strength (N/mm²)	300
Elongation (%)	15
Hardness Brinell	130
Impact Izod J20°C	35

Typical Physical Properties

Density g/cm³	8.9
Melting Temperature Range °C	1070 - 1080
Thermal Conductivity W/mK	320
Electrical Resistivity μΩ.m15°C	2.15
Coefficient of Thermal Expansion 0-250°C	16.45
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.