Bronze C932
Bronze C932 (SAE 660) – Standard Bearing Bronze for Bushings and High-Load Plain Bearings
Bronze C932, also known as SAE 660 bearing bronze, is the most widely used bearing bronze alloy. Its composition of 83% copper, 7% tin, 7% lead, and 3% zinc creates a self-lubricating matrix under slow-speed, high-load conditions — with lead particles providing emergency lubrication to prevent seizure when the oil film breaks down.
Key Properties
- Tensile Strength: 241 MPa
- Hardness: 60 HB
- Self-Lubricating: Yes — lead matrix provides emergency lubrication
- Density: 8.93 g/cm³
- Composition: 83% Cu / 7% Sn / 7% Pb / 3% Zn
- Standards: ASTM B584 / CDA 932
Common Applications
Plain bearings, bushings, thrust washers, wear plates, bridge expansion pins, and slow-speed heavily loaded bearing applications in industrial machinery, hydraulics, and heavy construction equipment.
Material properties
| Material name | Bronze C932 |
|---|---|
| Type | Brass & Bronze |
| Standard code | ASTM B584 / CDA 932 |
| Tensile strength (MPa) | 241 |
| Yield strength (MPa) | 124 |
| Fatigue strength (MPa) | 103 |
| Elongation (%) | 20 |
| Hardness (Brinell) | 60 |
| Density (g/cm³) | 8.93 |
| Electrical resistivity (µΩ·in) | 11.8 |
| Thermal conductivity (W/m·K) | 47 |
| Melting range (°C) | 854–1004 |
| Weldability | Poor |
| Formability | Fair |
| Shear modulus | 38 |
| Industry code | bronze_932 |