C67300
Leaded Manganese Bronze
Free-machining wrought manganese bronze. Combines high strength with the best machinability in the manganese bronze family.
Tensile Strength
55–80 ksi
Yield Strength
25–60 ksi
Machinability
70 / 100
Density
0.302 lb/in³
Chemical Composition
| Element | Min % | Max % |
|---|---|---|
| Copper (Cu) | 58 | 63 |
| Zinc (Zn) | — | Remainder |
| Manganese (Mn) | 2 | 3.5 |
| Silicon (Si) | 0.5 | 1.5 |
| Lead (Pb) | 0.4 | 3 |
| Iron (Fe) | — | 0.5 |
Physical Properties
| Density | 0.302 lb/cu in |
|---|---|
| Specific Gravity | 8.36 |
| Melting Point (Solidus) | 1590°F |
| Melting Point (Liquidus) | 1625°F |
| Electrical Conductivity | 20% IACS |
Mechanical Properties
| Tensile Strength | 55–80 ksi |
|---|---|
| Yield Strength | 25–60 ksi |
| Elongation | 15–30% |
| Hardness | 60–90 Rockwell B |
| Machinability Rating | 70 |
Thermal Properties
| Thermal Conductivity | 51 Btu/ft·hr·°F |
|---|---|
| Coefficient of Expansion | 11.8 × 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
- Bushings and bearing sleeves
- Gear components
- Valve stems
- Hydraulic cylinder parts
- Wear strips
- Shafting
Applicable Specifications
- SAE J461
- SAE J463
Frequently Asked Questions
Common questions about C67300 Leaded Manganese Bronze specifications, applications, and material properties.