C31400
Leaded Commercial Bronze
Good corrosion resistance with excellent machinability. The lead content improves chip breakage during machining operations.
Tensile Strength
37–54 ksi
Yield Strength
12–45 ksi
Machinability
80 / 100
Density
0.317 lb/in³
Chemical Composition
| Element | Min % | Max % |
|---|---|---|
| Copper (Cu) | 87.5 | 90.5 |
| Lead (Pb) | 1.3 | 2.5 |
| Zinc (Zn) | — | Remainder |
| Iron (Fe) | — | 0.1 |
| Nickel (Ni) | — | 0.7 |
Physical Properties
| Density | 0.317 lb/cu in |
|---|---|
| Specific Gravity | 8.78 |
| Melting Point (Solidus) | 1700°F |
| Melting Point (Liquidus) | 1830°F |
| Electrical Conductivity | 42% IACS |
Mechanical Properties
| Tensile Strength | 37–54 ksi |
|---|---|
| Yield Strength | 12–45 ksi |
| Elongation | 10–45% |
| Hardness | 55–80 Rockwell F |
| Machinability Rating | 80 |
Thermal Properties
| Thermal Conductivity | 104 Btu/ft·hr·°F |
|---|---|
| Coefficient of Expansion | 10.2 × 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
- Screw machine products
- Hardware
- Screws and fasteners
- Electrical connectors
- Industrial fittings
- Plumbing goods
Applicable Specifications
- ASTM B140
- SAE J461
- SAE J463
Frequently Asked Questions
Common questions about C31400 Leaded Commercial Bronze specifications and applications.