CuSn3Zn8Pb5-C - GS
| Standard designation | |
|---|---|
| Classification in accordance with DIN EN 1982 | CuSn3Zn8Pb5-C - GS |
| Material number in accordance with DIN EN 1982 | CC490K |
| Old classification in accordance with DIN 1705 and DIN 1716 | G-CuSn2ZnPb |
| Old material no. | 2.1098.01 |
| Chemical composition in weight % | |
|---|---|
| Copper Cu | 81.0-86.0 (including nickel) |
| Nickel Ni | < 0.2 |
| 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 |
| Amount of shrinkage °C | 1.3-1.5 |
| electr. conductivity at 20°C MS/m | 8.5 |
| Thermal conductivity at 20°C W/(m*K) | 71 |
| Linear thermal expansion coefficient 10-6/K | 18.0 |
| Mechanical properties | |
|---|---|
| Tensile strength Rm (MPa) | 180 |
| 0.2% - yield strength RP 0.2 (MPa) | 85 |
| Elongation at break A (%) | 15 |
| Brinell hardness HB10 | 60 |
| Technological properties | |
|---|---|
| Elasticity modulus GPa | 90-95 |
| Flexural strength MPa | 110 |
| Shear strength MPa | 155-170 |
| Chip brazing and weldability | |
|---|---|
| Machinability | 1 |
| Brazing | medium |
| Gas welding | poor |
| Inert gas welding | poor |
| Comments |
|---|
| Medium-hard construction material, good for casting, corrosion-resistant in service water, also at elevated temperatures |
| Notes on use |
|---|
| The alloy is used specifically for thin-walled valves (up to 12 mm wall thickness), suitable up to 225°C |