EN 12163 Grade CuZn23Al6Mn4Fe3Pb M

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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.

Related Standards

This material data has been provided by WIAM.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

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20.0 °C

8.2 g/cm³

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Elastic modulus

20.0 °C

105 GPa

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Shear modulus

23.0 °C

40 GPa

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Typical for Wrought Copper Brass



Coefficient of thermal expansion

23.0 °C

1.7E-5 - 2.1E-5 1/K

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Typical for Wrought Copper Brass

Melting point

875 - 1075 °C

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Typical for Wrought Copper Brass

Specific heat capacity

20.0 °C

377 J/(kg·K)

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Thermal conductivity

20.0 °C

27 W/(m·K)

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Electrical conductivity

20.0 °C

4.00E+6 S/m

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Specific Electrical conductivity

6.9 % IACS

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Chemical properties



5 - 7 %

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63 - 65.5 %

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2 - 3.5 %

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1 %

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3.5 - 5 %

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0.5 %

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