C67300
Leaded Manganese Bronze
Free-machining wrought manganese bronze. Combines high strength with the best machinability in the manganese bronze family.
Tensile Strength
65 ksi min
Yield Strength
40 ksi min
Density
0.3 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 |
| Tin (Sn) | — | 0.3 |
| Nickel (Ni) | — | 0.25 |
| Aluminum (Al) | — | 0.25 |
Physical Properties
| Density | 0.3 lb/cu in |
|---|---|
| Specific Gravity | 8.3 |
| Melting Point (Liquidus) | 1605°F |
| Electrical Conductivity | 22% IACS |
Mechanical Properties
| Tensile Strength | 65 ksi min |
|---|---|
| Yield Strength | 40 ksi min |
| Elongation | 11% min |
| Hardness | 80 Rockwell B min |
Thermal Properties
| Thermal Conductivity | 55 Btu/ft·hr·°F |
|---|---|
| Coefficient of Expansion | 11 × 10⁻⁶ /°F |
Fabrication Properties
CDA publishes no fabrication property data or machinability rating for C67300. Mechanical values above are the CDA-published minimums for extruded and drawn bar (H50 temper, sections under 1 inch).
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.