EN 12166 Grade CuZn40Mn1Pb1 H145

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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.

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Equivalent Materials

This material data has been provided by WIAM.

"Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
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.

Ashby charts




Elastic modulus

23.0 °C

100 - 125 GPa

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Typical for Wrought Copper Brass

Hardness, Vickers

20.0 °C

145 - 175 [-]

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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

23.0 °C

371 - 418 J/(kg·K)

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Typical for Wrought Copper Brass

Thermal conductivity

23.0 °C

100 - 234 W/(m·K)

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Typical for Wrought Copper Brass

Chemical properties



0.6 %

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57 - 59 %

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0.5 %

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1 - 2 %

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0.4 - 1.8 %

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1 %

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0.4 %

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0.5 %

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