Standard designation
|
Marking according to DIN EN 1982: |
CuSn3Zn8Pb5-C - GS |
|
Material number according to DIN EN 1982: |
CC490K |
|
Old mark based on DIN 1705 and DIN 1716: |
G-CuSn2ZnPb |
|
Old material no.: |
2.1098.01 |
Chemical composition in wt. %
|
Copper Cu: |
81,0-86,0 (indluding nickel) |
| Nickel Ni: | < 2,0 |
| Phosphorus P: | < 0,05 |
| Lead Pb: | 3,0-6,0 |
| Tin Sn: | 2,0-3,5 |
| Aluminium Al: | < 0,01 |
| Iron Fe: | < 0,5 |
| Sulphur S: | < 0,10 |
| Antimony Sb: | < 0,30 |
| Silicon Si: | < 0,01 |
| Zinc Zn: | 7,0-9,5 |
Physical properties
| Density g/cm³ | 8,7 |
| Melting range °C | 830-1040 |
|
Shrinkage value °C |
1,3-1,5 |
| Electr. conductivity at 20 °C MS/m | 8,5 |
| Thermal conductivity at 20 °C W/(m*K) | 71 |
| Linear expansion coefficient 10-6/K | 18,0 |
Mechanical characteristics
| Tensile strength Rm (MPa) | 180 |
| 0,2 % - yield strength RP0,2 (MPa) | 85 |
| Ultimate tensile strength A (%) | 15 |
| Brinell hardness HB10 | 60 |
Technological properties
| Elastic modulus GPa | 90-95 |
| Flexural fatique strength MPa | 110 |
| Shear strength MPa | 155-170 |
Machining brazing-soldering and weldability
| Machinability | 1 |
| Brazing | medium |
| Gas welding | poor |
| Inert gas welding | poor |
Comments
Medium-hard structural material, well castable, corrosion resistant against process water even at high temperatures.
Notes on usage
The alloy is specifically used for thin-walled valves (up to 12 mm wall thickness); suitable up to 225 °C.