EN 12166 CuZn40Pb2 H145 – Lead‑Enhanced Copper Alloy for Superior Machining
Material CuZn40Pb2, mat. No. CW617N, is an unhardenable wrought alloy. High hardness and strength parameter are achievable by cold forming only. Thermal and electrical conductivity are lower than for CuZn40. Machinability is improved by Pb-addition. Corrosion resistance to water, several saline solutions and organic liquids is also lower than for unleaded alloys of the same zinc-content. Processing properties: warm forming: very good cold forming: unfavorable machinability: very good hard soldering: moderately soft soldering: very good TIG-welding: unfavorable burnishing: very good Application: for hot-pressed components, turned parts for precision engineering and optics, circuit boards and clockwerks as well as for clamps for electrical engineering.
Properties
General
| Property | Temperature | Value |
|---|---|---|
Density | 20.0 °C | 8.4 - 8.44 g/cm³ |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Elastic modulus | 20.0 °C | 96 - 97 GPa | |
Hardness, Vickers | 20.0 °C | 145 [-] | |
Shear modulus | 23.0 °C | 40 GPa | Typical for Wrought Copper Brass |
Thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
Coefficient of thermal expansion | 100.0 °C | 2E-5 1/K | |
300.0 °C | 2.1E-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 | -200.0 °C | 50 W/(m·K) | |
20.0 °C | 113 - 123 W/(m·K) | ||
Electrical
| Property | Temperature | Value |
|---|---|---|
Electrical conductivity | 20.0 °C | 1.49E+7 - 1.50E+7 S/m |
200.0 °C | 1.20E+7 S/m | |
Electrical resistivity | 20.0 °C | 6.6E-8 Ω·m |
200.0 °C | 8.3E-8 Ω·m | |
Specific Electrical conductivity | 25 - 25.7 % IACS | |
Chemical properties
| Property | Value |
|---|---|
Aluminium | 0.05 % |
Copper | 57 - 59 % |
Iron | 0.3 % |
Lead | 1.6 - 2.5 % |
Nickel | 0.3 % |
Tin | 0.3 % |
Metal
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