EN 12451 Grade CuZn28Sn1As O50

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CuZn28Sn1As (CW706R former identification: CuZn28Sn1) is an unhardenable copper alloy. High hardness and strength parameter are achievable by cold forming only. Tin increases corrosion resistance and improves sliding qualities. CuZn28Sn1As is dezincification resistant and resistant to river and industrial water. Processing properties: warm forming: good cold forming: moderately machinability: moderately hard soldering: moderately soft soldering: very good TIG-welding: good burnishing: very good This special brass material is predominantly applicated in the form of tubes for freshwater carrying pipes or for heat-exchanger. To the operating conditions applies that the content of solute substances in cooling water is not allowed to exceed 0,1% and the pH-value for water is not allowed to decrease below 7,0. In the case of corrosion attack due to sedimentations tubes made of CW706R are more resistant than tubes of binary copper-zinc alloys. The material is applicable for water speeds up to 2m/s. Further application for bottoms and plates for condenser and other heat-transformer, ribbed tubes as well as for cooler in on shore appliances.

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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.

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20.0 °C

8.56 g/cm³

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Elastic modulus

20.0 °C

110 GPa

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20.0 °C

55 %

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Hardness, Vickers

20.0 °C

60 [-]

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Shear modulus

20.0 °C

41 GPa

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Tensile strength

20.0 °C

320 MPa

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Yield strength Rp0.2

20.0 °C

100 MPa

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Coefficient of thermal expansion

200.0 °C

1.95E-5 1/K

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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

109 W/(m·K)

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Electrical conductivity

20.0 °C

1.41E+7 S/m

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Electrical resistivity

20.0 °C

7.1E-8 Ω·m

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Chemical properties



0.02 - 0.035 %

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70 - 72.5 %

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0.07 %

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0.07 %

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0.1 %

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0.1 %

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0.01 %

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0.9 - 1.3 %

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