EN 12163 Grade R440 CuZn39Mn1AlPbSi – Premium Unhardenable Copper Alloy
CuZn39Mn1AlPbSi (CW718R former identification: CuZn40Al1) 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. CuZn39Mn1AlPbSi shows a mean wear resistance and favorable siding qualities. Processing properties: warm forming: very good cold forming: unfavorable machinability: moderately hard soldering: moderately soft soldering: unfavorable TIG-welding: moderately burnishing: very good The material is applicated for steering knuckle bushings, sliding bearings, sliding elements, worm gear rims and pinion gears.
Properties
General
| Property | Temperature | Value |
|---|---|---|
Density | 20.0 °C | 8.2 g/cm³ |
Mechanical
| Property | Temperature | Value |
|---|---|---|
Elastic modulus | 20.0 °C | 106 GPa |
Elongation | 20.0 °C | 12 - 15 % |
Elongation A10 | 20.0 °C | 10 % |
Shear modulus | 20.0 °C | 40 GPa |
Tensile strength | 20.0 °C | 440 MPa |
Yield strength Rp0.2 | 20.0 °C | 200 MPa |
Thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
Coefficient of thermal expansion | 95.0 °C | 2.16E-5 1/K | |
Melting point | 875 - 1075 °C | Typical for Wrought Copper Brass | |
Specific heat capacity | 23.0 °C | 371 - 418 J/(kg·K) | Typical for Wrought Copper Brass |
Thermal conductivity | 20.0 °C | 71 W/(m·K) |
Electrical
| Property | Temperature | Value |
|---|---|---|
Electrical conductivity | 20.0 °C | 9.10E+6 S/m |
Electrical resistivity | 20.0 °C | 1.1E-7 Ω·m |
Chemical properties
| Property | Value |
|---|---|
Aluminium | 0.3 - 1.3 % |
Copper | 57 - 60 % |
Iron | 0.5 - 1 % |
Lead | 0.2 - 0.8 % |
Manganese | 0.8 - 1.8 % |
Nickel | 0.5 - 1 % |
Silicon | 0.2 - 0.8 % |
Tin | 0.4 - 0.5 % |
Metal
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