PPP produces High purity copper powders by reduction process serving diverse markets and applications which includes self-lubricating bearings, chemical catalysts, metal-bonded abrasive wheels and cutting tools etc.

Copper PPP PURITY % (MIN) H2 LOSS (MAX) APPARENT DENSITY. g/cc. Flow sec. (MAX) SCREEN ANALYSIS-MESH. % Particle Shape
+60 +100 +200 +325 -325
100P 99.4 0.20 3.4-3.9 28
NIL 75-95 BAL TR. TR. granular
OS 99.4 0.20 3.2-3.6 28
NIL 40-50 30 BAL TR. irregular
100R 99.5 0.20 3.0-3.4 28
NIL 2-3 40-50 BAL 25-30 irregular
100R 99.5 0.30 2.5-3.0 30
NIL TR 30-35 BAL 35-45 irregular
200R 99.0 0.30 2.2-2.8 34
NIL NIL TR BAL 75-80 irregular
240R 99.0 0.30 1.7-3.0 N.A.
NIL NIL TR BAL 90-95 Highly irregular
L18 99.0 0.40 1.6-2.1 N.A.
NIL NIL NIL 2.5 95min Highly irregular
L14 99.0 0.40 0.9-1.4 N.A.
NIL NIL NIL 2.5 95min Highly irregular
300R 99.0 0.40 2.6-3.2 N.A.
NIL NIL NIL TR 98min irregular
    • BEARINGS  are recommended for blending with copper for the production of bronze self- lubricating bearings and for bronze structural components. The specific grades are selected to have controlled dimensional change characteristics.

    • FRICTION COMPONENTS  PB8100P, PB8L14, PB8L18, PB8240R and PB8OS are used in metallic and non-metallic friction material formulations to provide improved wear characteristics.

    • ABRASIVE WHEELS  PB8300R and PB8240R are used as matrix-bonding material for diamond and other abrasive wheels and cutting tools.

    • SINTERED COMPONENTS  PB8200R, PB8240R and PB8L18 are specially used as an additive to ferrous components for better homogenization.

High purity low apparent density copper powders nominally minus 200 mesh having a small average particle size, produced by a` reduction process. Powder particles are very irregular in shape.

PHYSICAL PROPERTIES
Determined on unlubricated powder
App. Density Carney, g/cc
Flow Rate s/50g.
Sieve Analysis, %
+200
-200 + 300
-300
TESTING

MPIF 28
MPIF 03
MPIF 05
SPECIFICATION

1.75-2.25
None

Nil
0-20%
80-100%
TYPICAL

1.85
None

Nil
06%
94%
COMPACTING PROPERTIES
Determined on 15g unlubricated
powder pressed at 12 tsi in
transverse rupture bar die.
Green density, g/cc
Green strength psi
Green strength N/mm2




MPIF 42
MPIF 15




5.80MIN.
2600MIN
17MIN.




6.10
2760
18.
CHEMICAL PROPERTIES
Total copper %
Hydrogen Loss %
Acid Insoluble, %


MPIF 02
MPIF 06

99.0MIN.
0.40Max
0.30

99.50
0.30
0.20

Powder has been developed for use as copper matrix in sintered metallic friction materials where a fine, low apparent density copper powder having medium to high green strength is required. Can be also used in carbon brush applications where low apparent density and high green strength characteristic is beneficial replacing electrolytic copper powders. It may also be used as an additive to ferrous components for better homogenization.