C93200 Tin Bronze Casting
C93200 Tin Bronze Casting (UNS C93200), commonly known as SAE 660 Bearing Bronze, contains nominally 83% copper, 7% tin, 7% lead, and 3% zinc. It is the most widely used bearing bronze in the world, offering excellent anti-friction properties, good machinability, and moderate strength. Indicative price: US$ 9.00/kilogram (subject to quantity and specification).
C93200 Chemical Composition
| Element |
Min % |
Max % |
| Copper (Cu) |
81.0 |
85.0 |
| Tin (Sn) |
6.3 |
7.5 |
| Lead (Pb) |
6.0 |
8.0 |
| Zinc (Zn) |
2.0 |
4.0 |
| Nickel (Ni) |
— |
1.0 |
| Iron (Fe) |
— |
0.20 |
C93200 Mechanical Properties (Sand Cast – ASTM B584)
| Property |
Value |
| Tensile Strength |
241 MPa (35,000 psi) min |
| Yield Strength |
124 MPa (18,000 psi) min |
| Elongation |
18% min |
| Brinell Hardness |
60 HB typical |
| Density |
8.93 g/cm³ |
| Melting Range |
854–1000°C (1570–1830°F) |
International Equivalents of C93200
| Standard |
Designation |
Common Name |
| USA – UNS |
C93200 |
SAE 660 Bearing Bronze |
| UK – BS 1400 |
LG2 |
Leaded Gunmetal |
| Europe – EN 1982 |
CC482K |
CuSn7Zn2Pb3 |
| Germany – DIN |
2.1090 |
CuSn7ZnPb |
| ISO 1338 |
CuSn6Zn6Pb3 |
Leaded Gunmetal |
| Japan – JIS H5111 |
CAC406 |
Gunmetal |
Typical Applications
C93200 / SAE 660 bearing bronze castings are the industry standard for: plain bearings and bushings, thrust washers, wear plates, bridge pins, electric motor bushings, pump shaft sleeves, and general anti-friction bearing applications.
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