C93200 (SAE 660) Bearing Bronze is considered the standard bearing material for light duty applications. While it is easily machined, the bronze alloy is hard, strong and resistant to wear. It also conforms well to journal irregularities and is less dependent on lubrication than other alloys. The alloy has reasonable corrosion resistance to seawater and brine.
Also known as: CDA 932, SAE 660, J461, J462, ASTM B-30 Alloy C93200, ASTM B-66 Alloy C93200, ASTM B144-3B, ASTM B-271 Alloy C93200, ASTM B-505 Alloy C93200, ASTM B-584 Alloy C93200, ASTM B763 Alloy C93200, QQC-390 Alloy E7, QQC-390 Rev. A/B Alloy C93200, Asarcon 773, 83-7-7-3, Mil B-11553-12, Mil C-15345-12, Din Rg 7, Ingot 315, CC493K, CuSn7ZnPb.
| Cu% | Sn% | Pb% | Zn% | Fe% | Ni% | Sb% | P% | S% | AI% | Mn% | Si% |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 81.00- 85.00 |
6.30- 7.50 |
6.00- 8.00 |
2.00- 4.00 |
0.20 | *1.00 | 0.35 | 1.5 | 0.08 | 0.005 | N/A | 0.005 |
*In determining copper minimum, copper may be calculated as copper plus nickel
Typical Uses
- Automotive:
- Automotive Fittings
- Fasteners:
- Washers
- Industrial:
- General Purpose Bushings, Bearings, Insert Bearings, Pump Fixtures, Fittings, Thrust Washers, Pumps, Bushings, Machine Parts, Main Spindle Bearings, Fuel Pump Bushings, Water Pump Bushings, Hydraulic Press Main Lining, Diesel Engine Wrist Pin Bushings, Fuel Pump Bearings, Trunion Bearings, Roll Neck Bearings, Rolling Mill Bearings, Linkage Bushings for Presses, Hydraulic Press Stuffing Box, Forging Press Toggle Lever Bearings, Bearings for Cranes, Machine Tool Bearings, Pump Impellers.
Bearing Bronze Properties
| Mechanical - Bearing Bronze | ||
|---|---|---|
| Tensile Strength, min | 35 ksi | 241 MPa |
| Yield Strength @ .5% ext under load min | 20 ksi | 138 MPa |
| Elongation in 2 in. or 50 mm min, % | 10 | |
| Brinell Hardness, min | N/A | |
| Machinability Rating | 70% | |
| Physical - Bearing Bronze | ||
|---|---|---|
| US Customary | Metric | |
| Melting Point-Liquidus | 1790 F | 977 C |
| Melting Point-Solidus | 1570 F | 854 C |
| Desnity | 0.322 lb/in3 @ 68 F |
8.91 gm/cm3 @ 20 C |
| Specific Gravity | 8.910 | 8.91 |
| Electrical Resistivity | 85.90 ohms-cmil/ft @ 68 F |
14.29 microhm-cm @ 20 C |
| Electrical Conductivity | 120 %IACS @ 68 F | 0.07 MegaSiemens/ cm @ 20 C |
| Thermal Conductivity | 33.60 Btu ft/ (hr ft2 oF) @ 68 F |
58.2 W/m oK @ 20 C |
| Coefficient of Thermal Expansion |
100 10-6 per oF (68-212 F) |
18.0 10-6 per oC (20-100 C) |
| Specific Heat Capacity | 0.090 Btu/lb/oF @ 68 F |
377.1 J/kg oK @ 293 K |
| Modulus of Elasticity in Tension |
14500 ksi | 100000 MPa |
| Magnetic Permeability* | 10 | 1.0 |
| *Field Strength 16 kA/m | ||
| Fabrication - Bearing Bronze | |
|---|---|
| Joining Technique | Suitability |
| Soldering | Excellent |
| Brazing | Good |
| Oxyacetylene Welding | Not Recommended |
| Gas Shielded Arc Welding | Not Recommended |
| Coated Metal Arc Welding | Not Recommended |