Standard designation
| Marking according to DIN EN 1982: | CuSn12Ni2-C - GS |
| Material number according to DIN EN 1982: | CC484K |
| Old mark based on DIN 1705 and DIN 1716: | G-CuSn12Ni |
| Old material no.: | 2.1060.01 |
Chemical composition in wt. %
| Copper Cu | 84,5-87,5 |
| Nickel Ni | 1,5-2,5 |
| Phosphorus P | 0,05-0,40 |
| Lead Pb | < 0,3 |
| Tin Sn | 11,0-13,0 |
| Aluminium Al | < 0,01 |
| Iron Fe | < 0,2 |
| Manganese Mn | < 0,2 |
| Sulphur S | < 0,05 |
| Antimony Sb | < 0,1 |
| Silicon Si | < 0,01 |
| Zinc Zn | < 0,4 |
Physical properties
| Density g/cm³ | 8,6 |
| Melting range °C | 830-1010 |
| Shrinkage value °C | 1,5 |
| Electrl. conductivity at 20 °C MS/m | 6,2 |
| Thermal conductivity at 20 °C W/(m*K) | 54 |
| Linear expansion coefficient10-6/K | 17,5 |
Mechanical characteristics
| Tensile strength Rm (MPa) | 280 |
| 0,2 % - yield strength RP0,2 (MPa) | 160 |
| Ultimate tensile strength A (%) | 12 |
| Brinell hardness HB10 | 85 |
Technological properties
| Elastic modulus GPa | 90-110 |
| Flexural fatique strength MPa | 140 |
| Shear strength MPa | 210-225 |
Machining brazing-soldering and weldability
| Machinability | 3 |
| Brazing | good |
| Gas welding | medium |
| Inert gas welding | medium |
Comments
Structural material with very good wear resistance, corrosion and salt water resistant, resistant to cavitation stress.
Notes on usage
Heavily loaded dome bricks and coupling pieces, spindle nuts moved under load, highly stressed, fast-running worm crown gears and screw crowns. Highly stressed valves and pump bodies, stators, impellers and paddle wheels for pumps and water turbines. Load characteristics for worm gears during continuous operation depending on the conduction velocity =1.5 to 8 MPa, for intermittent loads p=20 to 25 MPa.