EN 12167 Grade CuZn43Pb2 R430 – Leaded Brass Alloy with Enhanced Machinability

Material CuZn43Pb2, mat. No. CW623N, is an unhardenable wrought alloy. to the comparable make CuZn44Pb2, mat. No. 2.0410 acc. to DIN 17660 : 1983-12 applies: High hardness and strength parameter are achievable by cold forming only. Thermal and electrical conductivity are lower than for the unleaded brass grade of the same Zn-content. Machinability is improved by Pb-addition. Corrosion resistance to water, several saline solutions and organic liquids is also lower than for unleaded alloys of the same zinc-content. Processing properties: warm forming: very good cold forming: unfavorable machinability: very good hard soldering: moderately soft soldering: very good TIG-welding: unfavorable burnishing: very good Application: For thin-walled extruded profiles, e.g. construction profiles, handrails, stair rails, hinge profiles etc.

Properties

General

Property	Temperature	Value
Density	20.0 °C	8.4 g/cm³

Mechanical

Property	Temperature	Value
Elastic modulus	20.0 °C	84 GPa
Shear modulus	20.0 °C	31 GPa
Tensile strength	20.0 °C	430 MPa
Yield strength Rp0.2	20.0 °C	200 MPa

Thermal

Property	Temperature	Value	Comment
Coefficient of thermal expansion	200.0 °C	2.12E-5 1/K
Melting point		875 - 1075 °C	Typical for Wrought Copper Brass
Specific heat capacity	23.0 °C	371 - 418 J/(kg·K)	Typical for Wrought Copper Brass
Thermal conductivity	20.0 °C	126 W/(m·K)

Electrical

Property	Temperature	Value
Electrical conductivity	20.0 °C	1.64E+7 S/m
Electrical resistivity	20.0 °C	6.1E-8 Ω·m

Chemical properties

Property	Value
Aluminium	0.05 %
Copper	55 - 57 %
Iron	0.3 %
Lead	1.6 - 3 %
Nickel	0.3 %
Tin	0.3 %

EN 1652 Grade CuSn5 R630 – Precision Copper Tin Alloy for Tubes, Springs & Connectors EN 12167 Grade CuZn43Pb2 R480 – Lead-Containing Brass Alloy

Metal