EN 1652 Grade CuSn3Zn9 – High‑Performance Copper Alloy for Electrical Applications
Material CuSn3Zn9, mat. No. CW454K, is predominantly used in electrical engineering. The multicomponent alloy is characterized by a considerably lower stress corrosion sensitivity compared to the copper-zinc-alloys. The spring properties come up to alloy CuSn4 (CW450K). 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
| Property | Temperature | Value |
|---|---|---|
Density | 20.0 °C | 8.75 - 8.8 g/cm³ |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Elastic modulus | 20.0 °C | 120 - 126 GPa | |
Hardness, Vickers | 20.0 °C | 200 [-] | |
Poisson's ratio | 20.0 °C | 0.34 [-] | |
Shear modulus | 23.0 °C | 40 GPa | Typical for Wrought Copper Brass |
Thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
Coefficient of thermal expansion | 100.0 °C | 1.83E-5 1/K | |
300.0 °C | 1.85E-5 1/K | ||
Melting point | 875 - 1075 °C | Typical for Wrought Copper Brass | |
Specific heat capacity | 20.0 °C | 380 J/(kg·K) | |
200.0 °C | 410 J/(kg·K) | ||
Thermal conductivity | 20.0 °C | 120 W/(m·K) | |
Electrical
| Property | Temperature | Value |
|---|---|---|
Electrical conductivity | 20.0 °C | 1.20E+7 - 1.60E+7 S/m |
Specific Electrical conductivity | 21 - 28 % IACS |
Chemical properties
| Property | Value |
|---|---|
Iron | 0.1 % |
Lead | 0.1 % |
Nickel | 0.2 % |
Phosphorus | 0.2 % |
Tin | 1.5 - 3.5 % |
Zinc | 7.5 - 10 % |
Metal
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