EN 1652 CuNi12Zn24 R550 Alloy – High Strength, Corrosion Resistance, and Superior Machining

Material CuNi12Zn24, mat. No. CW403J is an alloy of high strength and hardness. To the comparabel DIN-mark CuNi12Zn24, mat. No. 2.0730, 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	8.67 - 8.7 g/cm³

Mechanical

Property	Temperature	Value
Elastic modulus	20.0 °C	125 GPa
Elongation A50	20.0 °C	3 %
Poisson's ratio	20.0 °C	0.34 [-]
Tensile strength	20.0 °C	550 - 650 MPa
Yield strength Rp0.2	20.0 °C	480 MPa

Thermal

Property	Temperature	Value	Comment
Coefficient of thermal expansion	300.0 °C	1.65E-5 1/K
Melting point		875 - 1135 °C	Typical for Wrought Copper Nickel Silver Grade
Specific heat capacity	20.0 °C	380 J/(kg·K)
Thermal conductivity	20.0 °C	42 W/(m·K)

Electrical

Property	Temperature	Value
Electrical conductivity	20.0 °C	4.00E+6 - 4.40E+6 S/m
Specific Electrical conductivity		7 - 8 % IACS

Chemical properties

Property	Value
Copper	63 - 66 %
Iron	0.3 %
Lead	0.03 %
Manganese	0.5 %
Nickel	11 - 13 %
Tin	0.03 %

EN 10277-5 Grade 51CrV4 Steel – Soft Annealed, Cold Drawn for High-Performance Applications EN 1652 Grade CuNi12Zn24 R620: High Strength, Corrosion‑Resistant Copper Alloy

Metal