C90700 Tin Bronze Casting
C90700 Tin Bronze Casting is a high-tin copper alloy (UNS C90700) containing nominally 89% copper and 11% tin, with no zinc or lead additions. Known for excellent hardness and wear resistance, C90700 is used for gears, worm wheels, and high-load bearing applications. Electrical Accessories India supplies C90700 sand castings and centrifugal castings. Indicative price: US$ 10.00/kilogram (subject to quantity and specification).
C90700 Chemical Composition
| Element |
Min % |
Max % |
| Copper (Cu) |
88.0 |
90.0 |
| Tin (Sn) |
10.0 |
12.0 |
| Lead (Pb) |
— |
0.50 |
| Zinc (Zn) |
— |
0.50 |
| Nickel (Ni) |
— |
0.50 |
| Iron (Fe) |
— |
0.15 |
C90700 Mechanical Properties (Sand Cast – ASTM B584)
| Property |
Value |
| Tensile Strength |
303 MPa (44,000 psi) min |
| Yield Strength |
152 MPa (22,000 psi) min |
| Elongation |
10% min |
| Brinell Hardness |
85 HB typical |
| Density |
8.77 g/cm³ |
| Melting Range |
827–1000°C (1520–1830°F) |
International Equivalents of C90700
| Standard |
Designation |
Common Name |
| USA – UNS |
C90700 |
High Tin Bronze (89-11) |
| UK – BS 1400 |
PB1 |
Phosphor Bronze |
| Europe – EN 1982 |
CC490K |
CuSn10 |
| Germany – DIN |
2.1050 |
CuSn10 |
| ISO 1338 |
CuSn10 |
Tin Bronze |
| Japan – JIS H5111 |
CAC403 |
Tin Bronze |
Typical Applications
C90700 tin bronze castings are preferred for: gears and worm wheels, high-load bushings and bearings, bridge plates and expansion joints, piston rings, and heavily loaded slow-speed bearings.
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