EN 1652 Grade CuZn40 R470 – High‑Performance Copper Alloy for Precision Applications
CuZn40 (CW509L) is an unhardenable wrought alloy. High hardness and strength parameter are achievable by cold forming only. Thermal and electrical conductivity are lower than for CuZn37. Corrosion resistance is similar to pure copper. Processing properties: warm forming: very good cold forming: good machinability: moderately hard soldering: good soft soldering: very good TIG-welding: moderately burnishing: very good CuZn40 is used for hot-pressed forgings, metal fitting and lock components, for nipple wire, condenser bottoms and watchcases.
Properties
General
| Property | Temperature | Value |
|---|---|---|
Density | 20.0 °C | 8.4 - 8.41 g/cm³ |
Mechanical
| Property | Temperature | Value |
|---|---|---|
Elastic modulus | -195.0 °C | 108 GPa |
-100.0 °C | 106 GPa | |
20.0 °C | 102 - 105 GPa | |
50.0 °C | 100 GPa | |
100.0 °C | 93 - 99 GPa | |
150.0 °C | 91 GPa | |
200.0 °C | 89 - 94 GPa | |
250.0 °C | 83 GPa | |
300.0 °C | 89 GPa | |
400.0 °C | 83 GPa | |
500.0 °C | 74 GPa | |
600.0 °C | 64 GPa | |
700.0 °C | 54 GPa | |
Elongation | 20.0 °C | 5 - 12 % |
Elongation A50 | 20.0 °C | 6 % |
Poisson's ratio | 20.0 °C | 0.34 [-] |
Shear modulus | 20.0 °C | 37 GPa |
Tensile strength | 20.0 °C | 470 MPa |
Yield strength Rp0.2 | 20.0 °C | 390 - 400 MPa |
Thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
Coefficient of thermal expansion | 23.0 °C | 1.7E-5 - 2.1E-5 1/K | Typical for Wrought Copper Brass |
Melting point | 875 - 1075 °C | Typical for Wrought Copper Brass | |
Specific heat capacity | 20.0 °C | 375 - 377 J/(kg·K) | |
Thermal conductivity | 20.0 °C | 109 - 117 W/(m·K) |
Electrical
| Property | Temperature | Value |
|---|---|---|
Electrical conductivity | 20.0 °C | 1.39E+7 - 1.50E+7 S/m |
Electrical resistivity | 20.0 °C | 6.7E-8 Ω·m |
Specific Electrical conductivity | 24 - 26 % IACS |
Chemical properties
| Property | Value |
|---|---|
Aluminium | 0.05 % |
Copper | 59.5 - 61.5 % |
Iron | 0.2 % |
Lead | 0.3 % |
Nickel | 0.3 % |
Tin | 0.2 % |
Metal
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