C31400 Leaded Commercial Bronze is a free machining brass with excellent electrical and thermal conductivity. The alloy is resistant to corrosion and contains 2% lead to impart free-cutting characteristics.
Also known as: CDA 314, ASTM B-140 Alloy C31400, Mil V-18436
| Cu% | Pb% | Zn% | Fe% | Ni% | P% |
|---|---|---|---|---|---|
| 87.50-90.50 | 1.30-2.50 | Remainder | 0.10 | 0.70 | N/A |
Typical Uses
- Builders Hardware:
- Door Knobs
- Electrical:
- Electrical Plug Type Connectors, Connectors for Wire and Cable
- Fasteners:
- Nuts, Screws
- Industrial:
- Pickling Crates, Pickling Fixtures, Pickling Racks, Screw Machine Parts
Leaded Commercial Bronze C31400 Properties
| Mechanical - H02 Half Hard Temper: 1/2" Dia. and Under | ||
|---|---|---|
| Tensile Strength, min | 50 ksi | 345 MPa |
| Yield Strength @ .5% ext under load min | 30 ksi | 205 MPa |
| Elongation in 2 in. or 50 mm min, % | 7 | |
| Brinell Hardness, min | N/A | |
| Machinability Rating | 80% | |
| Mechanical - H02 Half Hard Temper: Over 1/2" Dia. to 1" Incl. | ||
|---|---|---|
| Tensile Strength, min | 45 ksi | 310 MPa |
| Yield Strength @ .5% ext under load min | 27 ksi | 185 MPa |
| Elongation in 2 in. or 50 mm min, % | 10 | |
| Brinell Hardness, min | N/A | |
| Machinability Rating | 80% | |
| Mechanical - H02 Half Hard Temper: Over 1" Dia. | ||
|---|---|---|
| Tensile Strength, min | 40 ksi | 275 MPa |
| Yield Strength @ .5% ext under load min | 25 ksi | 170 |
| Elongation in 2 in. or 50 mm min, % | 12 | |
| Brinell Hardness, min | N/A | |
| Machinability Rating | 80 % | |
| Mechanical - H04 Hard Temper: 2" Dia. and Under | ||
|---|---|---|
| Tensile Strength, min | 53 ksi | 365 MPa |
| Yield Strength @ .5% ext under load min | 40 ksi | 275 MPa |
| Elongation in 2 in. or 50 mm min, % | 6 | |
| Brinell Hardness, min | N/A | |
| Machinability Rating | 80 % | |
| Physical Alloy Properties | ||
|---|---|---|
| US Customary | Metric | |
| Melting Point-Liquidus | 1900 F | 1038 C |
| Melting Point-Solidus | 1850 F | 1010 C |
| Density | 0.319 lb/in3 @ 68 F |
8.83 gm/cm3 @ 20 C |
| Specific Gravity | 8.83 | 8.83 |
| Electrical Resistivity | 24.70 ohms-cmil/ft @ 68 F |
4.11 microhm-cm @ 20 C |
| Electrical Conductivity | 420 %IACS @ 68 F | 0.246 MegaSiemens/ cm @ 20 C |
| Thermal Conductivity | 104 Btu ft/ (hr ft2 oF) @ 68 F |
180.0 W/m oK @ 20 C |
| Coefficient of Thermal Expansion |
10.20 10-6 per oF (68-572 F) |
18.4 10-6 per oC (20-300 C) |
| Specific Heat Capacity | 0.090 Btu/ib/oF @ 68 F |
377.1 J/Kg oK @ 293 K |
| Modulus of Elasticity in Tension |
17000 ksi | 117000 Mpa |
| Magnetic Permeability | 6400 ksi | 44130 Mpa |
| Fabrication | |
|---|---|
| Joining Technique | Suitability |
| Soldering | Excellent |
| Brazing | Good |
| Oxyacetylene Welding | Not Recommended |
| Gas Shielded Arc Welding | Not Recommended |
| Coated Metal Arc Welding | Not Recommended |
| Spot Weld | Not Recommended |
| Seam Weld | Not Recommended |
| Butt Weld | Fair |
| Capacity for being Cold Worked | Good |
| Capacity for being Hot Worked | Poor |