EN 1652 Grade CuZn20Al2As H070

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Description

CuZn20Al2As (CW702R former identification: CuZn20Al2) is an unhardenable copper alloy. High hardness and strength values are achievable by cold forming only. Strength properties, corrosion resistance and oxidation resistance are increasable by Al-addition. CuZn20Al2As is seawater and dezincification resistant, and insensitive to stress corrosion in stress-relieved condition. Processing properties: warm forming: moderately cold forming: moderately machinability: moderately hard soldering: moderately soft soldering: unfavorable TIG-welding: good burnishing: very good The material is predominantly suitable for smooth and ribbed tubes and for heat-exchanger in condenser construction as well as for seawater pipelines. It is due to its favorable corrosion and erosion behaviour a reliable material in cooling water with salinities of more than 0,2%, e.g. in brack and seawater at water speed up to 2,5 m/s. In the case of a natural protective oxide film damage occurs a self-healing process.

Related Standards

Equivalent Materials

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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Properties

General

PropertyTemperatureValue

Density

20.0 °C

8.33 g/cm³

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Mechanical

PropertyTemperatureValue

Elastic modulus

20.0 °C

112 GPa

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50.0 °C

130 GPa

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100.0 °C

128 GPa

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150.0 °C

126 GPa

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200.0 °C

123 GPa

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250.0 °C

120 GPa

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300.0 °C

118 GPa

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350.0 °C

115 GPa

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400.0 °C

112 GPa

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450.0 °C

109 GPa

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500.0 °C

105 GPa

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Hardness, Vickers

20.0 °C

70 - 105 [-]

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Shear modulus

20.0 °C

42 GPa

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Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

200.0 °C

1.85E-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

100 W/(m·K)

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Electrical

PropertyTemperatureValue

Electrical conductivity

20.0 °C

1.34E+7 S/m

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Electrical resistivity

20.0 °C

7.5E-8 Ω·m

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Chemical properties

PropertyValue

Aluminium

1.8 - 2.3 %

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Arsenic

0.02 - 0.035 %

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Copper

76 - 79 %

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Iron

0.07 %

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Lead

0.07 %

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Magnesium

5E-3 %

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Manganese

0.1 %

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Nickel

0.1 %

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Phosphorus

0.01 %

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