Cast C93200
The lead content in high leaded tin bronze alloys is between 7.00% and 15.00%. These alloys are free cutting and retain favorable thermal conductivity and good lubricity due to the lead content. Alloy C93200, also termed C932, bearing bronze, SAE 660, SAE 660 bronze, and SAE 660 bearing bronze, is considered this family’s workhorse alloy and is widely used in many bearing applications.
Information
Product description: Leaded Tin bronze
Solids: 1/2" to 13" O.D.
Tubes: 1” to 16” O.D.
Rectangles: Up to 20”
Standard lengths: 105”
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
AUTOMOTIVE: automotive fittings
Fasteners: washers
Industrial: bushings, bearings, bearings for cranes, diesel engine wrist pin bushings, forging press toggle lever bearings, insert bearings, fittings, fuel pump bushings, general purpose bushings, hydraulic press main lining, hydraulic press stuffing box, linkage bushings for presses, machine parts, machine tool bearings, main spindle bearings, pump fixtures, pump impellers, pumps, roll neck bearings, rolling mill bearings, thrust washers, trunion bearings, water pump bushings
Similar or equivalent specification
| CDA | ASTM | SAE | AMS | Federal | Military | Other |
|---|---|---|---|---|---|---|
| C93200 | B505 B505M | J461 J462 | QQ-C-390, E7; QQ-B-1005, Comp 12 | QQ-C-390, E7; QQ-B-1005, Comp 12 | Bearing Bronze |
Chemical composition
| Cu%1 | Pb% | Sn% | Zn% | Fe% | P% | Ni%1,2 | Al% | S% | Sb% | Si% |
|---|---|---|---|---|---|---|---|---|---|---|
| 81.00-85.00 | 6.00-8.00 | 6.30-7.50 | 2.00-4.00 | 0.20 | 1.50 | 1.00 | 0.005 | 0.05 | 0.35 | 0.005 |
Chemical composition according to ASTM B505/B505M-23
¹In determining Cu min., Cu may be calculated as Cu + Ni. ²Ni value includes Co.
Note: Cu + sum of named elements, 99.5% min. Single values represent maximums.
Machinability
| Copper alloy UNS no. | Machinability rating | Density (lb / in³ at 68°F) |
|---|---|---|
| C93200 | 70 | 0.322 |
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 | 10 | 65 | |
Mechanical properties according to ASTM B505/B505M-23
Physical properties
| US Customary | Metric | |
|---|---|---|
| Melting point - liquidus | 1790 °F | 977 °C |
| Melting point - solidus | 1570 °F | 854 °C |
| Density | 0.322 lb/in³ at 68 °F | 8.91 gm/cm³ at 20 °C |
| Specific gravity | 8.91 | 8.91 |
| Electrical conductivity | 12% IACS at 68 °F | 0.07 MegaSiemens/cm at 20 °C |
| Thermal conductivity | 33.6 Btu/sq ft/ft hr/°F at 68 °F | 58.2 W/m at 20 °C |
| Coefficient of thermal expansion 68-572 | 10 · 10-6 per °F (68-572 °F) | 17.3 · 10-6 per °C (20-300 °C) |
| Specific heat capacity | 0.09 Btu/lb/°F at 68 °F | 377.1 J/kg at 20 °C |
| Modulus of elastic in tension | 14500 ksi | 100000 MPa |
Fabrication properties
| Technique | Suitability |
|---|---|
| Soldering | Excellent |
| Brazing* | Good |
| Oxyacetylene welding | Not recommended |
| Gas shielded arc welding | Not recommended |
| Coated metal arc welding | Not recommended |
| Machinability rating | 70 |
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.