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. |