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EN 1652 Grade CuZn0.5 R220 – High Conductivity, Unhardenable Copper Alloy

CuZn0,5, mat. No CW119C, is counted among unhardenable, low alloyed copper alloys. To the comparable make CuZn0,5, mat. No 2.0205, acc. to DIN 17666 : 1983-12 applies: A strength increase is achievable only by cold forming. According to the deformation level the tensile strength is between 220 and 360 N/mm². Temperature for removal of workhardening is above 250°C. Electrical conductivity is very high. Corrosion resistance is equal to unalloyed copper. Processing properties: hot forming: good cold forming: very good machinability: moderately soft and hard soldering: very good gas shielded welding: very good burnishing: good Application: For strips, construction parts and all types of hollow-ware as well as for heat transmission elements. For the electrolytically tinned strip the coatings (Sn bright, Sn matt, Sn fuzed, SnPb) are listed by the application (better solderability, better corrosion resistance, reduction of the electrical contact resistance, better appearance) in the DIN EN 14436 : 2004-11 (Table 5)

Properties

General

PropertyTemperatureValue

Density

20.0 °C

8.9 - 8.92 g/cm³

Mechanical

PropertyTemperatureValueComment

Elastic modulus

20.0 °C

127 GPa

Elongation

20.0 °C

42 %

Elongation A50

20.0 °C

33 %

Poisson's ratio

20.0 °C

0.34 [-]

Shear modulus

23.0 °C

48 GPa

Typical for Wrought Copper Pure / Low Alloyed Copper

Tensile strength

20.0 °C

220 - 260 MPa

Yield strength Rp0.2

20.0 °C

140 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

300.0 °C

1.77E-5 1/K

Melting point

965 - 1100 °C

Typical for Wrought Copper Pure / Low Alloyed Copper

Specific heat capacity

20.0 °C

386 J/(kg·K)

100.0 °C

395 J/(kg·K)

200.0 °C

407 J/(kg·K)

Thermal conductivity

20.0 °C

350 W/(m·K)

Electrical

PropertyTemperatureValue

Electrical conductivity

20.0 °C

4.80E+7 S/m

Specific Electrical conductivity

83 % IACS

Chemical properties

PropertyValue

Phosphorus

0.02 %

Zinc

0.1 - 1 %


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