EN 12166 Grade R340: CuZn35Pb1 Brass Alloy for Superior Machining

Material CuZn35Pb1, mat. No. CW600N, is an unhardenable wrought alloy. 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: For wheels and circuit boards in watch industry, matrices for printing industry, clamps for electrical engineering, nipples, screws.

Properties

General

Property	Temperature	Value
Density	20.0 °C	8.45 - 8.5 g/cm³

Mechanical

Property	Temperature	Value	Comment
Elastic modulus	20.0 °C	110 GPa
Elongation	20.0 °C	20 %
Elongation A100	20.0 °C	10 %
Elongation A11.3	20.0 °C	15 %
Shear modulus	23.0 °C	40 GPa	Typical for Wrought Copper Brass
Tensile strength	20.0 °C	340 MPa
Yield strength Rp0.2	20.0 °C	280 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	113 W/(m·K)

Electrical

Property	Temperature	Value
Electrical conductivity	20.0 °C	1.47E+7 S/m
Specific Electrical conductivity		25 % IACS

Chemical properties

Property	Value
Aluminium	0.05 %
Copper	62.5 - 64 %
Iron	0.1 %
Lead	0.8 - 1.6 %
Nickel	0.3 %
Tin	0.1 %

EN 12166 CuZn20 R540 Wire – Premium Copper Alloy for General Applications EN 12164 CuZn35Pb1 R400 Brass – High Strength & Cold Formability

Metal