SAE-863
Sintered Bronze (High Density)
Higher density sintered bronze for increased load capacity. Provides better strength than standard sintered bronze.
Chemical Composition
| Element | Min % | Max % |
|---|---|---|
| Copper (Cu) | 87.5 | 90.5 |
| Tin (Sn) | 9.5 | 10.5 |
| Graphite (Graphite) | — | 0.5 |
| Iron (Fe) | — | 1 |
| Other (Other) | — | 0.5 |
Physical Properties
| Density | 0.25 lb/cu in |
|---|---|
| Specific Gravity | 6.9 |
| Porosity | 11-16% |
| Oil Content | 14-19% by volume |
Mechanical Properties
| Tensile Strength | 21 ksi |
|---|---|
| Yield Strength | N/A |
| Elongation | N/A |
| Hardness | 60–85 Rockwell H |
| Machinability Rating | N/A |
Thermal Properties
| Coefficient of Expansion | 10 × 10⁻⁶ /°F |
|---|---|
| Max Operating Temp | 225°F |
Fabrication Properties
Typical Applications
- Medium-duty bearings
- Industrial equipment
- Agricultural machinery
- Construction equipment
- Material handling
- Higher-load self-lubricating applications
Applicable Specifications
- SAE 863
- ASTM B438
- MPIF 35
Frequently Asked Questions
Common questions about SAE-863 Sintered Bronze (High Density)
SAE-863 Sintered Bronze is a self-lubricating bearing material used for medium-duty bearings, industrial equipment, agricultural machinery, construction equipment. The oil-impregnated porous structure provides continuous lubrication without external maintenance.
Yes, SAE-863 is an oil-impregnated sintered bronze with 14-19% by volume oil content by volume. The porous structure (11-16% porosity) acts as an oil reservoir, releasing lubricant during operation and reabsorbing it when at rest.
SAE-863 has a maximum continuous operating temperature of 225°F. Above this temperature, the oil may degrade or migrate out of the bearing structure, reducing its self-lubricating properties.
SAE-863 sintered bronze is typically not machined after sintering. It is manufactured to near-net shape through powder metallurgy. Secondary operations are limited to maintain the porous structure essential for oil retention and self-lubrication.
SAE-841 has higher porosity (18-22% vs 11-16%) and oil content, making it better for light-duty, maintenance-free applications. SAE-863 offers higher strength and load capacity for medium-duty industrial applications.