EN 12163 Grade CuNi18Zn20 H140 – High-Strength Copper–Nickel–Zinc Alloy

Material CuNi18Zn20, mat. No. CW409J is an alloy of high strength and hardness. To the comparabel mark CuNi18Zn20, mat. No. 2.0740, acc. to DIN 17663 : 1983-12 applies: Strength is further increasable due to the high strain hardening capability. The material does not embrittle at low temperatures. Low electrical and thermal conductivity. The alloy is non-magnetic, corrosion resistance is better than for pure copper. Processing properties: warm forming: moderately cold forming: very good machinability: moderately hard and soft soldering: very good TIG-welding: very good burnishing: very good Application: In electrical engineering and electronics for springs, contacts, membranes as well as in precision engineering and in equipment manufacturing. In food industry, for musical instruments, glasses frames, safety keys as well as in construction trade for paneling, show-cases and stairrails.

Properties

General

Property	Temperature	Value
Density	20.0 °C	8.7 - 8.73 g/cm³

Mechanical

Property	Temperature	Value
Elastic modulus	20.0 °C	135 GPa
Hardness, Brinell	20.0 °C	140 - 180 [-]
Hardness, Vickers	20.0 °C	145 - 185 [-]
Poisson's ratio	20.0 °C	0.34 [-]

Thermal

Property	Temperature	Value	Comment
Coefficient of thermal expansion	300.0 °C	1.7E-5 1/K
Melting point		875 - 1135 °C	Typical for Wrought Copper Nickel Silver Grade
Specific heat capacity	20.0 °C	383 J/(kg·K)
Thermal conductivity	20.0 °C	33 W/(m·K)

Electrical

Property	Temperature	Value
Electrical conductivity	20.0 °C	3.30E+6 S/m
Specific Electrical conductivity		6 % IACS

Chemical properties

Property	Value
Copper	60 - 63 %
Iron	0.3 %
Lead	0.03 %
Manganese	0.5 %
Nickel	17 - 19 %
Tin	0.03 %

EN 12163 CuNi12Zn24 R640: High-Strength, Corrosion-Resistant Copper-Nickel-Zinc Alloy EN 12163 CuNi18Zn20 H170 – High Strength, Corrosion-Resistant Copper Alloy

Metal