Standard designation
| Marking according to DIN EN 1982: | CuSn7Zn4Pb7-C - GS |
| Material number according to DIN EN 1982: | CC493K |
| Old mark based on DIN 1705 and DIN 1716: | G-CuSn7ZnPb |
| Old material no.: | 2.1090.01 |
Chemical composition in wt. %
| Copper Cu: | 81,0-85,0 (including nickel) |
| Nickel Ni: | < 2,0 |
| Phosphorus P: | < 0,10 |
| Lead Pb: | 5,0-8,0 |
| Tin Sn: | 6,0-8,0 |
| Aluminium Al: | < 0,01 |
| Iron Fe: | < 0,2 |
| Sulphur S: | < 0,10 |
| Antimony Sb: | < 0,3 |
| Silicon Si: | < 0,01 |
| Zinc Zn: | 2,0-5,0 |
Physical properties
| Density g/cm³ | 8,8 |
| Melting range °C | 860-1020 |
| Shrinkage value °C | 1,3-1,5 |
| Electr. conductivity at 20 °C MS/m | 7,5 |
| Thermal conductivity at 20 °C W/(m*K) | 64 |
| Linear expansion coefficient 10-6/K | 18,5 |
Mechanical characteristics
| Tensile strength Rm (MPa) | 230 |
| 0,2 % - yield strength RP0,2 (MPa) | 120 |
| Ultimate tensile strength A (%) | 15 |
| Brinell hardness HB10 | 60 |
Technological properties
| Elastic modulus GPa | 98-115 |
| Flexural fatique strength MPa | 110 |
| Shear strength MPa | 180-190 |
Machining brazing-soldering and weldability
| Machinability | 1 |
| Brazing | medium |
| Gas welding | poor |
| Inert gas welding | poor |
Comments
| Medium-hard sliding-bearing material with good antifriction properties; resistant to seawater. |