EN 12163: CuZn28 H145 Wrought Copper Alloy – High Strength, Excellent Machinability

CuZn28 (CW504L) is an unhardenable wrought alloy. High hardness and strength parameter are achievable by cold forming only. Thermal and electrical conductivity are lower than for CuZn20. Corrosion resistance is similar to pure copper. Processing properties: warm forming: good cold forming: very good machinability: moderately hard and soft soldering: very good TIG-welding: good burnishing: good CuZn28 is used for deep drawing components and all types of sleeves, for automotive cooler, musical instruments, springing elements and clockfaces and as cladding material for ingot steel.

Properties

General

Property	Temperature	Value
Density	20.0 °C	8.55 - 8.6 g/cm³

Mechanical

Property	Temperature	Value
Elastic modulus	20.0 °C	114 GPa
Hardness, Brinell	20.0 °C	145 [-]
Hardness, Vickers	20.0 °C	150 [-]
Shear modulus	20.0 °C	40 GPa

Thermal

Property	Temperature	Value	Comment
Coefficient of thermal expansion	23.0 °C	1.7E-5 - 2.1E-5 1/K	Typical for Wrought Copper Brass
Melting point		875 - 1075 °C	Typical for Wrought Copper Brass
Specific heat capacity	20.0 °C	377 J/(kg·K)
Thermal conductivity	20.0 °C	130 W/(m·K)

Electrical

Property	Temperature	Value
Electrical conductivity	20.0 °C	1.65E+7 S/m
Electrical resistivity	20.0 °C	6.1E-8 Ω·m

Chemical properties

Property	Value
Aluminium	0.02 %
Copper	71 - 73 %
Iron	0.05 %
Lead	0.05 %
Nickel	0.3 %
Tin	0.1 %

EN 12167 Grade CuAl10Fe3Mn2 R650 – High‑Strength, Temperature‑Resistant Wrought Copper Alloy EN 12163 Grade CuZn28 R460 – Premium Copper Alloy for Automotive, Industrial & Electrical Applications

Metal