Cast C93700
The lead content in these alloys is between 7 percent and 30 percent. High-leaded tin bronzes are free cutting and retain favorable thermal conductivity and good lubricity due to the lead content. The high-leaded tin bronzes are ideal for bearing applications where there could be a loss of the lubrication boundary. These alloys perform excellent in unforgiving environments where foreign matter may be present, such as dirt and other foreign materials. The high-leaded alloys are able to envelope foreign matter due to their malleable nature and, in doing so, protect the wear surface of a mating part such as a shaft.
Information
PRODUCT DESCRIPTION: High-Leaded Tin Bronze
SOLIDS: 1/2" to 10" O.D.
TUBES: 1” to 16” O.D.
RECTANGLES: Up to 20”
STANDARD LENGTHS: 144”
SHAPE/FORM: semi-finished, mill stock or near-net shapes, anode, bar stock, billet/bloom, squares, hex, plate, profile or structural shape, flats/rectangular bar
Typical Uses
BUILDERS HARDWARE: brackets
FASTENERS: nuts, washers for engines
INDUSTRIAL: applications requiring acid resistance to sulphite fluids, bearing plates, bearings, bushings, bushings for high speed and heavy pressure, corrosion-resistant castings, crank shafts, high speed/heavy load bearings, impellers, machine parts, parts for steel mill maintenance, pressure-tight castings, pumps, slide guides for steel mills
MARINE: large bearings for ships
Similar or Equivalent Specification
| CDA | ASTM | SAE | AMS | Federal | Military | Other |
|---|---|---|---|---|---|---|
| C93700 | B505 B505M | 65 J461 J462 | QQ-C-390, E10 | MIL-B-11553, Comp 23 | Bearing Bronze; 80-10-10 Bronze |
Chemical Composition
| Cu% | Pb% | Sn% | Zn% | Fe%1 | P% | Ni%2 | Al% | S% | Sb% | Si% |
|---|---|---|---|---|---|---|---|---|---|---|
| 78.00-82.00 | 8.00-11.00 | 9.00-11.00 | 0.80 | 0.70 | 1.50 | 0.50 | 0.005 | 0.08 | 0.50 | 0.005 |
Chemical Composition according to ASTM B505/B505M-18
¹Fe shall be 0.35% max., when used for steel-backed bearings. ²Ni value includes Co.
Note: Cu + Sum of Named Elements, 99.0% min. Single values represent maximums.
Machinability
| Copper Alloy UNS No. | Machinability Rating | Density (lb / in³ at 68°F) |
|---|---|---|
| C93700 | 80 | 0.32 |
Mechanical Properties
| Tensile Strength, min | Yield Strength, at 0.5% Extension Under Load, min | Elongation, in 2 in. or 50 mm min | Brinell Hardness (500 kg load) | Remarks | ||
|---|---|---|---|---|---|---|
| ksi | MPa | ksi | MPa | % | typical BHN | |
| 35 | 241 | 20 | 138 | 6 | 60 | |
Physical Properties
| US Customary | Metric | |
|---|---|---|
| Melting Point - Liquidus | 1705 °F | 929 °C |
| Melting Point - Solidus | 1403 °F | 762 °C |
| Density | 0.32 lb/in³ at 68 °F | 8.86 gm/cm³ at 20 °C |
| Specific Gravity | 8.86 | 8.86 |
| Electrical Conductivity | 10% IACS at 68 °F | 0.059 MegaSiemens/cm at 20 °C |
| Thermal Conductivity | 27.1 Btu/sq ft/ft hr/°F at 68 °F | 46.9 W/m at 20 °C |
| Coefficient of Thermal Expansion 68-572 | 10.3 · 10-6 per °F (68-212 °F) | 17.8 · 10-6 per °C (20-100 °C) |
| Specific Heat Capacity | 0.09 Btu/lb/°F at 68 °F | 377.1 J/kg at 20 °C |
| Modulus of Elastic in Tension | 11000 ksi | 75800 MPa |
| Incipient Melting | 600°F | 316°C |
| Magnetic Permeability | 1 | 1 |
Fabrication Properties
| Technique | Suitability |
|---|---|
| Soldering | Excellent |
| Brazing* | Good |
| Oxyacetylene Welding | Fair |
| Gas Shielded Arc Welding | Fair |
| Coated Metal Arc Welding | Fair |
| Machinability Rating | 20 |
Fabrication Properties provided by CDA
*Since brazing is performed withing the hot-short range, strain must be avoided during brazing and cooling.
Thermal Properties
| Treatment | Value* | Time** |
|---|---|---|
| Stress Relief | 500 | |
| Solution Treatment | 0 |
Thermal Properties provided by CDA
*Temperature is measured in Fahrenheit. **For Stress Relief, Solution Treatment and Annealing - Time is measured in hours/inch of thickness. For Precipitation Heat Treatment - Time is measured in hours.