Standard designation
| Marking according to DIN EN 1982: | CuSn7Zn2Pb3-C - GS |
| Material number according to DIN EN 1982: | CC492K |
| Old mark based on DIN 1705 and DIN 1716: | G-CuSn6ZnNi |
| Old material no.: | 2.1093.01 |
Chemical composition in wt. %
| Copper Cu: | 85,0-89,0 (including nickel) |
| Nickel Ni: | < 0,2 |
| Phosphorus P: | < 0,10 |
| Lead Pb: | 2,5-3,5 |
| Tin Sn: | 6,0-8,0 |
| Aluminium Al: | < 0,01 |
| Iron Fe: | < 0,2 |
| Sulphur S: | < 0,10 |
| Antimony Sb: | < 0,25 |
| Silicon Si: | < 0,01 |
| Zinc Zn: | 1,5-3,0 |
Physical properties
| Density g/cm³ | 8,7 |
| Melting range °C | 830-1030 |
| Shrinkage value °C | 1,3-1,5 |
| Electr. conductivity at 20 °C MS/m | 7,9 |
| Thermal conductivity at 20 °C W/(m*K) | 69 |
| Linear expansion coefficient 10-6/K | 18,5 |
Mechanical characteristics
| Tensile strength Rm (MPa) | 230 |
| 0,2 % - yield strength RP0,2 (MPa) | 130 |
| Ultimate tensile strength A (%) | 14 |
| Brinell hardness HB10 | 65 |
Technological properties
| Elastic modulus GPa | 90-96 |
| Flexural fatique strength MPa | 80 |
| Shear strengt MPa | 200-215 |
Machining brazing-soldering and welbability
| Machinability | 1 |
| Brazing | good |
| Gas welding | medium |
| Inert gas welding | poor |
Comments
| Construction material with good stability and expansion, good for casting, resistant to seawater. |
Notes on usage
| Already being widely used as a structural material. |