Leaded Tin Bronze
Leaded tin bronze alloys are free cutting and retain favorable thermal conductivity and good lubricity due to the presence of lead. 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
C93200
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 |
MIL-B-11553, Comp 12 | Bearing Bronze |
Chemical Composition
| Cu%1 | Pb% | Sn% | Zn% | Fe% | P% | Ni%1,2 | Al% | S% | Sb% | Si% | |
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Chemical Composition according to ASTM B505/B505M-18 1In determining Cu min., Cu may be calculated as Cu + Ni. 2Ni value includes Co. Note: Cu + Sum of Named Elements, 99.0% min. Single values represent maximums. |
|||||||||||
| 81.00- 85.00 |
6.00- 8.00 |
6.30- 7.50 |
2.00- 4.00 |
0.20 |
1.50 |
1.00 |
0.005 |
0.08 |
0.35 |
0.005 |
|
Machinability
| Copper Alloy UNS No. | Machinability Rating | Density (lb/in3 at 68 °F) |
|---|---|---|
| C93200 | 70 | 0.322 |
Mechanical Properties
|
Mechanical Properties according to ASTM B505/B505M-18 |
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| 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 | ||||||
Physical Properties
|
Physical Properties provided by CDA |
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| 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 68-212 | 10 · 10-6 per °F (68-212 °F) | 17.3 · 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 Elasticity in Tension | 14500 ksi | 100000 MPa | |||||||||
Fabrication Properties
|
Fabrication Properties provided by CDA *Since brazing is performed within the hot-short range, strain must be avoided during brazing and cooling. |
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| 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
|
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. |
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