Bearing Bronze – (UNS C93200)

Oct 3 2012

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Other Designations
Fabrication and Heat Treatment
     Welding
     Heat Treatment
     Machinability

Introduction

Bronze bearing materials comprise a wide range of properties derived from a variety of compositions and alloys. This data sheet provides more information and chemical composition, physical and mechanical properties and designations of UNS C93200 bearing bronzes.

Chemical Composition

The chemical composition of UNS C93200 bearing bronzes is outlined in the following table.

Element Content (%)
Cu 83
Sn 7
Pb 7
Zn 3

Physical Properties

The following table shows the physical properties of UNS C93200 bearing bronzes.

Properties Metric Imperial
Density 8.93 g/cm3 0.323 lb/in3

Mechanical Properties

The mechanical properties of UNS C93200 bearing bronzes are displayed in the following table.

Properties Metric Imperial
Hardness, Brinell 65 65
Tensile strength, ultimate 240 MPa 34800 psi
Tensile strength, yield (@strain 0.500%) 125 MPa 18100 psi
Elongation at break (in 50 mm) 20.00% 20.00%
Modulus of elasticity 100 GPa 14500 ksi
Compressive strength (at permanent set of 10%) 315 MPa 45700 psi
Izod impact 8.00 J 5.90 ft-lb
Fatigue strength (@# of cycles 1.00e+8,rotating beam) 110 MPa 16000 psi
Machinability (UNS C36000 (free-cutting brass) = 100%) 70% 70%
Poisson's ratio 0.34 0.34

Other Designations

Related Stories

Equivalent materials to UNS C93200 bearing bronzes are:

  • ASTM B271
  • ASTM B30
  • ASTM B505
  • ASTM B584
  • ASTM B763
  • QQ C390
  • SAE 660
  • SAE J461
  • SAE J462

Fabrication and Heat Treatment

Welding

UNS C93200 bearing bronzes are capable of being brazed and soldered. The welding processes not recommended for these alloys include carbon arc welding, oxyacetylene welding, coated metal arc welding and gas shielded arc welding.

Heat Treatment

UNS C93200 bearing bronzes have a stress reliving temperature of 260°C (500°F). These alloys do not respond to heat treatment.

Machinability

UNS C93200 bearing bronzes have a machinability rating of 70%.

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