EN 12163 Grade CuNi1Si R440 – Premium Hardened Copper Alloy

CuNi1Si, mat. No CW109C, is counted among hardenable, low alloyed copper alloys. To the comparable DIN-make CuNi1,5Si, mat. No 2.0853, acc. to DIN 17666 : 1983-12 applies: The material shows favorable electrical and thermal conductivity, corrosion resistance, high fatigue and creep resistance as well as favorable spring properties. CuNi1Si is in hardened condition resistant to stress corrosion. Temperature for removal of workhardening approximates 450°C. Strength still increases at low-temperature range. Processing properties: hot and cold forming: good machinability: moderately soft soldering: good hard soldering: moderately gas shielded welding: moderately burnishing: good Application: Particularly for aerial line material, such as clamps, mounting links, nuts, high-strength and corrosion resistant screws. Furthermore for wire ropes in electrical overhead line construction, bearing bushings, roller bearing cages, valve guide bushings and springs.

Properties

General

Property	Temperature	Value
Density	20.0 °C	8.8 - 8.9 g/cm³

Mechanical

Property	Temperature	Value	Comment
Elastic modulus	23.0 °C	110 - 130 GPa	Typical for Wrought Copper High Copper Alloy
Elongation	20.0 °C	16 %
Elongation A100	20.0 °C	6 %
Elongation A11.3	20.0 °C	8 %
Tensile strength	20.0 °C	440 MPa
Yield strength Rp0.2	20.0 °C	300 MPa

Thermal

Property	Temperature	Value	Comment
Coefficient of thermal expansion	300.0 °C	1.68E-5 1/K
Melting point		855 - 1090 °C	Typical for Wrought Copper High Copper Alloy
Specific heat capacity	20.0 °C	377 J/(kg·K)

Electrical

Property	Temperature	Value
Electrical conductivity	20.0 °C	2.20E+7 S/m
Specific Electrical conductivity		38 % IACS

Chemical properties

Property	Value
Iron	0.2 %
Lead	0.02 %
Manganese	0.1 %
Nickel	1 - 1.6 %
Silicon	0.4 - 0.7 %

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Metal