EN 12166 CuZn35Pb2 H070 – High-Strength Brass with Enhanced Machinability

Material CuZn35Pb2, mat. No. CW601N, is an unhardenable wrought alloy. To the comparable make CuZn36Pb1,5, mat. No. 2.0331 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: good machinability: very good hard soldering: moderately soft soldering: very good TIG-welding: unfavorable burnishing: very good Application: Wheels for circuit boards in watch industry, matrices for printing industry, clamps for electrical engineering, nipples, screws.

Properties

General

Property	Temperature	Value
Density	20.0 °C	8.46 - 8.5 g/cm³

Mechanical

Property	Temperature	Value
Elastic modulus	20.0 °C	105 - 110 GPa
Hardness, Brinell	20.0 °C	70 - 120 [-]
Hardness, Vickers	20.0 °C	80 - 130 [-]
Shear modulus	20.0 °C	39 GPa

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	113 - 116 W/(m·K)

Electrical

Property	Temperature	Value
Electrical conductivity	20.0 °C	1.47E+7 S/m
Electrical resistivity	20.0 °C	6.8E-8 Ω·m
Specific Electrical conductivity		25 % IACS

Chemical properties

Property	Value
Aluminium	0.05 %
Copper	62 - 63.5 %
Iron	0.1 %
Lead	1.6 - 2.5 %
Nickel	0.3 %
Tin	0.1 %

EN 12168 CuZn35Pb2 H100 Brass – Properties & Applications EN 12166 Grade CuZn35Pb2 H125 – Unhardenable Wrought Alloy with Improved Machinability

Metal