C64200
Silicon Aluminum Bronze
Best machinability of aluminum bronzes. The silicon addition improves machining while maintaining corrosion resistance.
Tensile Strength
70–85 ksi
Yield Strength
28–50 ksi
Machinability
60 / 100
Density
0.278 lb/in³
Chemical Composition
| Element | Min % | Max % |
|---|---|---|
| Copper (Cu) | 89.5 | 92 |
| Aluminum (Al) | 6.3 | 7.6 |
| Silicon (Si) | 1.5 | 2.2 |
| Iron (Fe) | — | 0.3 |
| Tin (Sn) | — | 0.2 |
Physical Properties
| Density | 0.278 lb/cu in |
|---|---|
| Specific Gravity | 7.69 |
| Melting Point (Solidus) | 1840°F |
| Melting Point (Liquidus) | 1880°F |
| Electrical Conductivity | 7% IACS |
Mechanical Properties
| Tensile Strength | 70–85 ksi |
|---|---|
| Yield Strength | 28–50 ksi |
| Elongation | 20–35% |
| Hardness | 65–85 Rockwell B |
| Machinability Rating | 60 |
Thermal Properties
| Thermal Conductivity | 21 Btu/ft·hr·°F |
|---|---|
| Coefficient of Expansion | 9.5 × 10⁻⁶ /°F |
| Specific Heat | 0.09 Btu/lb·°F |
Fabrication Properties
Soldering
Brazing
Oxyacetylene Welding
Gas Shielded Arc
Coated Metal Arc
Cold Working
Hot Forming
Typical Applications
- Valve stems
- Fasteners
- Hardware
- Bushings
- Screw machine products
- Marine components
Applicable Specifications
- ASTM B150
- SAE J461
- SAE J463