EN 12166 CuZn36Pb3 H070 Brass Alloy – Properties & Applications

Material CuZn36Pb3, mat. No. CW603N, is an unhardenable wrought alloy. to the comparable make CuZn36Pb3, mat. No. 2.0375 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: good cold forming: limited 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, hand rails, for stair rails, for screw machine parts in watch and electrical industry as well as for precision mechanics and optics.

Properties

General

Property	Temperature	Value
Density	20.0 °C	8.47 - 8.5 g/cm³

Mechanical

Property	Temperature	Value	Comment
Elastic modulus	20.0 °C	102 GPa
Hardness, Brinell	20.0 °C	70 - 120 [-]
Hardness, Vickers	20.0 °C	80 - 130 [-]
Shear modulus	23.0 °C	40 GPa	Typical for Wrought Copper Brass

Thermal

Property	Temperature	Value	Comment
Coefficient of thermal expansion	200.0 °C	2.06E-5 1/K
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	100 W/(m·K)

Electrical

Property	Temperature	Value
Electrical conductivity	20.0 °C	1.30E+7 S/m
Electrical resistivity	20.0 °C	7.7E-8 Ω·m
Specific Electrical conductivity		22 % IACS

Chemical properties

Property	Value
Aluminium	0.05 %
Copper	60 - 62 %
Iron	0.3 %
Lead	2.5 - 3.5 %
Nickel	0.3 %
Tin	0.2 %

EN 12166 Grade CuZn36Pb3 (H125) – High-Strength, Lead-Enhanced Brass Alloy DIN 17200 Grade 34CrMoS4 – Cold Shear Treatment (+S) for High-Performance Automotive Components

Metal