EN 12166 CuZn40Mn1Pb1 (H090) – Premium Unhardenable Copper Alloy for Bearings and Screws

CuZn40Mn1Pb1 (CW720R former identification: CuZn40MnPb) is an unhardenable copper alloy. High hardness and strength parameter are achievable by cold forming only. Manganes increases corrosion resistance and sliding qualities. Improved machinability by Pb-addition. Processing properties: warm forming: good cold forming: unfavorable machinability: good hard soldering: moderately soft soldering: very good TIG-welding: unfavorable burnishing: very good Application for roller bearing cages and screw machine products.

Properties

General

Property	Temperature	Value
Density	20.0 °C	8.1 - 8.3 g/cm³

Mechanical

Property	Temperature	Value
Elastic modulus	20.0 °C	95 GPa
Hardness, Brinell	20.0 °C	90 - 150 [-]
Hardness, Vickers	20.0 °C	100 - 135 [-]
Shear modulus	20.0 °C	36 GPa

Thermal

Property	Temperature	Value	Comment
Coefficient of thermal expansion	200.0 °C	1.9E-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	67 W/(m·K)

Electrical

Property	Temperature	Value
Electrical conductivity	20.0 °C	8.70E+6 S/m
Electrical resistivity	20.0 °C	1.15E-7 Ω·m

Chemical properties

Property	Value
Aluminium	0.2 %
Copper	57 - 59 %
Iron	0.3 %
Lead	1 - 2 %
Manganese	0.5 - 1.5 %
Nickel	0.6 %
Silicon	0.1 %
Tin	0.3 %

EN 12166 CuZn39Pb3 H095 – Copper Alloy Grade Specification & Key Properties EN 12166 CuZn40Pb2 H145 – Lead‑Enhanced Copper Alloy for Superior Machining

Metal