EN 12163 Grade CuZn33 R460 – High-Strength Unhardenable Copper Alloy for Precision Applications

CuZn33 (CW506L) is an unhardenable wrought alloy. High hardness and strength parameter are achievable by cold forming only. Thermal and electrical conductivity are lower than for CuZn30. 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: very good CuZn33 is used for deep drawing components, metal goods, watch parts, polishing sheet, wire mesh, cooler strips, tubular rivets and as etching brass. For the electrolytically tinned strip the coatings (Sn bright, Sn matt, Sn fuzed, SnPb) are listed by the application (better solderability, better corrosion resistance, reduction of the electrical contact resistance, better appearance) in the DIN EN 14436 : 2004-11 (Table 5)

Properties

General

Property	Temperature	Value
Density	20.0 °C	8.5 g/cm³

Mechanical

Property	Temperature	Value
Elastic modulus	20.0 °C	112 GPa
Poisson's ratio	20.0 °C	0.34 [-]
Shear modulus	20.0 °C	40 GPa
Tensile strength	20.0 °C	460 MPa
Yield strength Rp0.2	20.0 °C	420 MPa

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	121 W/(m·K)

Electrical

Property	Temperature	Value
Electrical conductivity	20.0 °C	1.55E+7 - 1.60E+7 S/m
Electrical resistivity	20.0 °C	6.5E-8 Ω·m
Specific Electrical conductivity		28 % IACS

Chemical properties

Property	Value
Aluminium	0.02 %
Copper	66 - 68.5 %
Iron	0.05 %
Lead	0.05 %
Nickel	0.3 %
Tin	0.1 %

EN 12163 CuZn33 (H145) – High‑Strength Unhardenable Copper Alloy EN 12163 CuZn35Ni3Mn2AlPb R550: High-Performance Copper Alloy for Superior Strength and Corrosion Resistance

Metal