Phosphorus Bronze is also referred as Tin Bronze. Tin increases the strength of copper alloys. Unless Tin is present in high concentrations, thermal conductivity effect is very small for Tin compared with most other alloy elements. It is also having low friction coefficients against steel. The combination of this properties cause the surface temperatures of the Tin Bronze to tend to remain lower than other bearing alloys.
Since hit adversely affects all bearings, this is seem as a distinct advantage. The Tin Bronze is hard and strong and have good corrosion resistance especially against sea water. The alloys work well with grease lubricant. They can function as a boundary type bearings due to their ability to form polar compound with small traces of lubricants, thus stabilizing extremely thin organic layers and there by reducing the chance for metal to metal contact.
PB-2
Standard: BS 1400
| Copper Alloy | Copper Alloys | SN | PB | ZN | FE | NI | P | AL | SI | Impurities |
|---|---|---|---|---|---|---|---|---|---|---|
| PB 2 | Rem. | 11-30 | 0.5 | 0.3 | 0.15 | 0.5 | 0.15 min | 0.01 | 0.02 | 0.2 |
Phosphorus Bronze
Standard: IS: 28-1985
| Copper Alloys | Cu | SN | PB | ZN | FE | NI | P | AL | SI | Impurities |
|---|---|---|---|---|---|---|---|---|---|---|
| Phosphorus Bz(Grade-2) | Rem. | 10 Min | 0.25 | 0.05 | 0.1 | 0.1 | 0.5 Min | 0.01 | 0.02 | 0.6 |