12. CuSn5Pb9-C / CuSn5Pb9-B (CC494K / CB494K)

CuSn5Pb9-C /  CuSn5Pb9-B (CC494K / CB494K)

Common name Material description
World specifications
EuropeanBritishAmerican
High-leaded tin bronzeCuSn5Pb9-C / CuSn5Pb9-BCC494K / CB494K
(EN 1982)
LB4
(BS 1400)
C93500
(ASTM B 505)

The equivalence between the standards is not absolute and some variations in composition can exist.

Chemical Composition in %, (EN 1982:2017, Castings)

 CuSnPbZnNiAlFeMnPSSiSbAsCrBiCdSe
Min80.04.08.0--------------
Max87.06.010.02.02.00.010.250.20.10.100.010.5-----

Chemical Composition in %, (EN 1982:2017, Ingots)

 CuSnPbZnNiAlFeMnPSSiSbAsCrBiCdSe
Min80.04.28.2--------------
Max86.56.010.02.02.00.010.200.20.10.080.010.5-----

Mechanical Properties (EN 1982:2017, Continuous castings)

RmTensile strength min.200 N/mm2
Rp0.2Proof Strength min.100 N/mm2
AElongation min.9 %
HBBrinell hardness min.60 HBW

Properties:

Most commonly used bearing alloy, found in bearings operating at moderate loads and moderate-ta-high speeds, as in electric motors and appliances.

  • material for plain bearings in mechanical engineering with medium loads;
  • very good emergency running;
  • high wear resistance;

Application:

  • bearings of cranes and elevators;
  • minor machine tool bearings;
  • bearing for packing machines and electric motors;
  • general bearing in mechanical engineering;
  • valve and gate seat rings;
  • guide bushes in hydraulic cylinders;
  • slip rings.