EN 1652 Grade CuNi18Zn27 R700 – Premium High‑Strength, Corrosion‑Resistant Copper Alloy

Material CuNi18Zn27, mat. No. CW410J is an alloy of high strength and hardness. To the comparabel mark CuNi18Zn27, mat. No. 2.0742, 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
Poisson's ratio	20.0 °C	0.34 [-]
Tensile strength	20.0 °C	700 - 800 MPa
Yield strength Rp0.2	20.0 °C	660 MPa

Thermal

Property	Temperature	Value	Comment
Coefficient of thermal expansion	23.0 °C	1.6E-5 - 1.9E-5 1/K	Typical for Wrought Copper Nickel Silver Grade
Melting point		875 - 1135 °C	Typical for Wrought Copper Nickel Silver Grade
Specific heat capacity	20.0 °C	380 - 383 J/(kg·K)
Thermal conductivity	20.0 °C	32 - 33 W/(m·K)

Electrical

Property	Temperature	Value
Electrical conductivity	20.0 °C	3.00E+6 - 3.30E+6 S/m
Specific Electrical conductivity		5 - 6 % IACS

Chemical properties

Property	Value
Copper	53 - 56 %
Iron	0.3 %
Lead	0.03 %
Manganese	0.5 %
Nickel	17 - 19 %
Tin	0.03 %

CuNi18Zn20 R640 (EN 1652) – High-Strength, Corrosion-Resistant Copper Alloy EN 1652 Grade CuSn3Zn9 H080 – Superior Copper‑Tin Alloy for Electrical Engineering

Metal