EN 1652 Grade CuZn39Pb0.5 R540 – Unhardenable Wrought Alloy with Enhanced Machinability

Material CuZn39Pb0,5, mat. No. CW610N, is an unhardenable wrought alloy. to the comparable make CuZn39Pb0,5, mat. No. 2.0372 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: moderately machinability: good hard soldering: moderately soft soldering: very good TIG-welding: moderately burnishing: very good Application: For plug pins, fitting parts, rivets, condenser plates, floor plate screeding and drawing instruments.

Properties

General

Property	Temperature	Value
Density	20.0 °C	8.4 g/cm³

Mechanical

Property	Temperature	Value
Elastic modulus	20.0 °C	102 GPa
Shear modulus	20.0 °C	37 GPa
Tensile strength	20.0 °C	540 MPa
Yield strength Rp0.2	20.0 °C	490 MPa

Thermal

Property	Temperature	Value	Comment
Coefficient of thermal expansion	200.0 °C	2.04E-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	109 W/(m·K)

Electrical

Property	Temperature	Value
Electrical conductivity	20.0 °C	1.39E+7 S/m
Electrical resistivity	20.0 °C	7.2E-8 Ω·m

Chemical properties

Property	Value
Aluminium	0.05 %
Copper	59 - 60.5 %
Iron	0.2 %
Lead	0.2 - 0.8 %
Nickel	0.3 %
Tin	0.2 %

EN 1652 Grade CuZn37Pb0.5 H170 – Lead-Enhanced Brass with Superior Strength and Machinability EN 1652 CuZn5 H045 – Premium Copper‑Zinc Alloy for Electrical Engineering

Metal