Bronze Fastener Wire
The most suitable composition is phosphorous bronze for fasteners.
Features:
- toughness
- strength
- low coefficient of friction
- fine grained
- Resistance to fatigue and corrosion
- resistance to wear in salt and water environment
While tin increases the strength of the material, phosphorous improves the fluidity of the metal, making it easier to cast.
The following grades of phosphor bronze wires are suitable for manufacturing fasteners.
| Alloy | CSL Alloys | ISO | German | USA | Chemical composition | |||
|---|---|---|---|---|---|---|---|---|
| DIN | ASTM | JIS | Sn | P | Cu | |||
| Phosphor Bronze | PB 1% | IS 7608, IS7611 & IS7811 Grade I, II, III & IS10710 Grade I & II | – | C50500 | 0.5-1.5% | 0.02-0.4% | Rem. | |
| PB 4% | CuSn4 | C51100 | C51100 | 3.5-4.5% | 0.02-0.4% | Rem. | ||
| PB 5% | CuSn5 | C51000 | C5102 | 4.5-5.5% | 0.02-0.4% | Rem. | ||
| PB 6% | CuSn6 | C51900 | C5191 | 5.5-7.0% | 0.02-0.4% | Rem. | ||
| PB 8% | CuSn8 | C52100 | C5210 | 7.5-9.0 % | 0.02-0.4% | Rem. | ||