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.