C90500 Tin Bronze Casting
C90500 Tin Bronze Casting is a copper-tin-zinc alloy (UNS C90500) widely known as Gun Metal, containing nominally 88% copper, 10% tin, and 2% zinc. Electrical Accessories India manufactures C90500 sand castings, centrifugal castings, and continuous cast bars for high-strength bearings, marine applications, and pressure-tight components. Indicative price: US$ 9.50/kilogram (subject to quantity and specification).
C90500 Chemical Composition
| Element |
Min % |
Max % |
| Copper (Cu) |
86.0 |
89.0 |
| Tin (Sn) |
9.0 |
11.0 |
| Zinc (Zn) |
1.0 |
3.0 |
| Lead (Pb) |
— |
0.30 |
| Nickel (Ni) |
— |
1.0 |
| Iron (Fe) |
— |
0.20 |
C90500 Mechanical Properties (Sand Cast – ASTM B584)
| Property |
Value |
| Tensile Strength |
310 MPa (45,000 psi) min |
| Yield Strength |
152 MPa (22,000 psi) min |
| Elongation |
16% min |
| Brinell Hardness |
75 HB typical |
| Density |
8.70 g/cm³ |
| Melting Range |
832–1000°C (1530–1830°F) |
International Equivalents of C90500
| Standard |
Designation |
Common Name |
| USA – UNS |
C90500 |
Gun Metal |
| UK – BS 1400 |
LG4 |
Leaded Gunmetal |
| Europe – EN 1982 |
CC491K |
CuSn10Pb2 |
| Germany – DIN |
2.1052 |
CuSn10Pb |
| ISO 1338 |
CuSn10 |
Tin Bronze |
| Japan – JIS H5111 |
CAC407 |
Tin Bronze |
Typical Applications
C90500 Gun Metal castings are used for: high-strength bearings and bushings, marine propeller hubs and fittings, pressure-tight valve bodies, pump casings and impellers, steam and hydraulic fittings, gears and worm wheels.
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