Tin Bronzes – RG7
EN 1982 CC493K
CuSn7ZnPb
It is an alloy of tin bronze, also known as red bronze or lead bronze.
International standards ASTM B505 C93200 and RG7 DIN 1705
It has an excellent correlation of resistance and elongation.
It is a semi-hard material resistant to abrasion, corrosion and sea water.
Chemical Composition
| Cu % | Ni % | P % | Pb % | Sn % | Zn % | A1 % | Fe % | S % | Sb % | Si % |
|---|---|---|---|---|---|---|---|---|---|---|
| Min. 83 Max. 85 | Max. 2 | Max. 0,1 | Min. 5 Max. 8 | Min. 6 Max. 8 | Min. 2 Max. 5 | Max. 0,01 | Max. 0,2 | Max. 0,01 | Max. 0,03 | Max. 0,01 |
Mechanical Properties
| Hardness HB | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation % | Hardness (HBW) |
|---|---|---|---|---|
| Continuous Casting | 260 | 120 | 12 | 70 |
| Centrifugal Casting | 260 | 120 | 12 | 70 |
Physical Properties
| Density (kg/dm3) | Specific Heat Capacity (J/(gr.K)) | Thermal Expansion (10-6k) | Thermal Conductivity (W/(m.K)) | Electrical Conductivity (Ω mm²/m) |
|---|---|---|---|---|
| 8,8 | 0,356 | 18,5 | 64 | 7,5 |