EN 12164 CuZn40Mn1Pb1 R440 – High-Performance Unhardenable Copper Alloy
CuZn40Mn1Pb1 (CW720R former identification: CuZn40MnPb) is an unhardenable copper alloy. High hardness and strength parameter are achievable by cold forming only. Manganes increases corrosion resistance and sliding qualities. Improved machinability by Pb-addition. Processing properties: warm forming: good cold forming: unfavorable machinability: good hard soldering: moderately soft soldering: very good TIG-welding: unfavorable burnishing: very good Application for roller bearing cages and screw machine products.
Properties
General
| Property | Temperature | Value |
|---|---|---|
Density | 20.0 °C | 8.1 - 8.3 g/cm³ |
Mechanical
| Property | Temperature | Value |
|---|---|---|
Elastic modulus | 20.0 °C | 95 GPa |
Elongation | 20.0 °C | 18 - 20 % |
Elongation A10 | 20.0 °C | 15 % |
Elongation A100 | 20.0 °C | 8 - 10 % |
Elongation A11.3 | 20.0 °C | 15 % |
Shear modulus | 20.0 °C | 36 GPa |
Tensile strength | 20.0 °C | 440 - 540 MPa |
Yield strength Rp0.2 | 20.0 °C | 250 - 300 MPa |
Thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
Coefficient of thermal expansion | 200.0 °C | 1.9E-5 1/K | |
Melting point | 875 - 1075 °C | Typical for Wrought Copper Brass | |
Specific heat capacity | 20.0 °C | 377 J/(kg·K) | |
Thermal conductivity | 20.0 °C | 67 W/(m·K) |
Electrical
| Property | Temperature | Value |
|---|---|---|
Electrical conductivity | 20.0 °C | 8.70E+6 S/m |
Electrical resistivity | 20.0 °C | 1.15E-7 Ω·m |
Chemical properties
| Property | Value |
|---|---|
Aluminium | 0.2 - 0.6 % |
Copper | 57 - 59 % |
Iron | 0.3 - 0.5 % |
Lead | 1 - 2 % |
Manganese | 0.4 - 1.8 % |
Nickel | 0.3 - 1 % |
Silicon | 0.1 - 0.4 % |
Tin | 0.3 - 0.5 % |
Metal
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