Bronze Powder
PPP produces High purity partially bonded bronze powders for self-lubricating bearings, microbearings and bronze sintered parts. The materials are ready to press admixed with lubricant.
- PPP partially alloy bronze have the following advantages.
- Excellent green strength.
- No compositional segregation.
- Free flow.
- Fine porosity and smooth surface appearance.
- Tight tolerances on sized bearing.
- Low distortion on sized bearings.
| GRADE. | A.D (GM/CC) | FLOW SEC.(MAX) | G.D AT 4.2T/sqin (gm/cc) | MESH SIZE | --325 MESH(%) | DIMENSIONAL CHANGE (%) | RADIAL CRUSHING STRENGTH(kg/mm2) min. |
| 95Cu-05Sn | 2.7-2.9 | 33 | 6.4-6.5 | 100 | 40-50 | +0.9 | 17 |
| 90Cu-10Sn | 2.7-3.2 | 34 | 6.2-6.3 | 100 | 50-60 | +0.7 | 18 |
| 91Cu-09Sn | 2.7-3.2 | 34 | 6.2-6.4 | 100 | 50-60 | +0.8 | 18.5 |
- Note:The test were carried on a cyclindrical bush specimen pressed at 6.2 gm/cc and sintered in a laboratory furnace under dissociated ammonia atmosphere.