EN 12163 CuZn23Al6Mn4Fe3Pb (R780) – High-Strength, Seawater-Resistant Copper Alloy

CuZn23Al6Mn4Fe3Pb (CW 704R former identification: CuZn23Al6Mn4Fe3) is an unhardenable copper alloy. High hardness and strength values are achievable by cold forming only. Strength properties are improved by AL- and Fe- addition. Manganese and aluminium increase corrosion resistance. The alloy is seawater resistant. Processing properties: warm forming: good cold forming: unfavorable machinability: good hard soldering: unfavorable soft soldering: unfavorable burnishing: very good CuZn23Al6Mn4Fe3Pb is a construction material of very high strength, particularly for high static loading. Application for plates and tubes in condensators and heat-exchangers as well as for seawater pipes.

Properties

General

Property	Temperature	Value
Density	20.0 °C	8.2 g/cm³

Mechanical

Property	Temperature	Value	Comment
Elastic modulus	20.0 °C	105 GPa
Elongation	20.0 °C	8 %
Shear modulus	23.0 °C	40 GPa	Typical for Wrought Copper Brass
Tensile strength	20.0 °C	780 MPa
Yield strength Rp0.2	20.0 °C	540 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	27 W/(m·K)

Electrical

Property	Temperature	Value
Electrical conductivity	20.0 °C	4.00E+6 S/m
Specific Electrical conductivity		6.9 % IACS

Chemical properties

Property	Value
Aluminium	5 - 7 %
Copper	63 - 65.5 %
Iron	2 - 3.5 %
Lead	1 %
Manganese	3.5 - 5 %
Nickel	0.5 %

EN 12166 Grade CuZn36 H160 – High-Performance Copper Alloy Wire EN 12166 CuZn36 (H190) – Premium Unhardenable Wrought Alloy for High‑Performance Applications

Metal