CuZn31Si1 (CW708R) – Grade H115 Copper Alloy for Machine & Friction Applications
CuZn31Si1 (CW708R) is an unhardenable copper alloy. High hardness and strength parameter are achievable by cold forming only. Silicon decreases stress corrosion sensitivity. CuZn31Si1 shows favorable friction qualities. Processing properties: warm forming: moderately cold forming: good machinability: moderately hard soldering: moderately soft soldering: moderately TIG-welding: good burnishing: very good Appliction in machine, apparatus and plant construction particularly as friction elements such as bearing bushings, guidances etc.
Properties
General
| Property | Temperature | Value |
|---|---|---|
Density | 20.0 °C | 8.4 - 8.41 g/cm³ |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Elastic modulus | 20.0 °C | 108 GPa | |
Hardness, Brinell | 20.0 °C | 110 - 150 [-] | |
Hardness, Vickers | 20.0 °C | 115 - 155 [-] | |
Shear modulus | 23.0 °C | 40 GPa | Typical for Wrought Copper Brass |
Thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
Coefficient of thermal expansion | 200.0 °C | 1.92E-5 1/K | |
Melting point | 875 - 1075 °C | Typical for Wrought Copper Brass | |
Specific heat capacity | 20.0 °C | 394 J/(kg·K) | |
100.0 °C | 403 J/(kg·K) | ||
200.0 °C | 415 J/(kg·K) | ||
Thermal conductivity | 20.0 °C | 71 W/(m·K) | |
100.0 °C | 79 W/(m·K) | ||
200.0 °C | 86 W/(m·K) | ||
Electrical
| Property | Temperature | Value |
|---|---|---|
Electrical conductivity | 20.0 °C | 8.90E+6 S/m |
Specific Electrical conductivity | 15 % IACS |
Chemical properties
| Property | Value |
|---|---|
Copper | 66 - 70 % |
Iron | 0.4 % |
Lead | 0.8 % |
Nickel | 0.5 % |
Silicon | 0.7 - 1.3 % |
Metal
- EN 12163 CuZr TH Grade – High Strength Low‑Alloy Copper Alloy
- EN 12163 Grade CuBe2 M: High-Performance Hardenable Copper Alloy
- EN 12163 Grade CuZn10 M – High-Strength, Corrosion-Resistant Copper Alloy
- EN 12163 CuZn40 M: High-Performance Unhardenable Wrought Copper Alloy
- EN 12163 CuZn31Si1 (H140) – High-Performance Unhardenable Copper Alloy
- EN 12163 Grade CuZn28 H115: High-Performance Copper Alloy for Industrial Applications
- EN 12163 Grade CuZn30 H115 – Premium Copper Alloy for Precision Applications
- EN 12163 CuZn33 H115 – High-Performance Copper Alloy for Precision Components
- EN 12163 CuZn31Si1 R460 – Unhardenable Copper Alloy for Friction Components
- EN 12163 CuZn31Si1 R530 – High-Performance Copper Alloy for Friction Applications