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C91300 Tin Bronze Casting
C91300 Tin Bronze Casting
C91300 Tin Bronze Casting is an ultra-high tin copper alloy (UNS C91300) containing nominally 81% copper and 19% tin — the highest tin content in the standard ASTM tin bronze family. It delivers exceptional hardness and is used for specialized gear, bearing, and art bronze applications. Indicative price: US$ 12.00/kilogram (subject to quantity and specification).
C91300 Chemical Composition
| Element | Min % | Max % |
|---|---|---|
| Copper (Cu) | 79.0 | 83.0 |
| Tin (Sn) | 18.0 | 20.0 |
| Lead (Pb) | — | 0.25 |
| Zinc (Zn) | — | 0.25 |
| Nickel (Ni) | — | 0.50 |
| Phosphorus (P) | — | 0.05 |
C91300 Mechanical Properties (Sand Cast – ASTM B584)
| Property | Value |
|---|---|
| Tensile Strength | 255 MPa (37,000 psi) min |
| Yield Strength | 207 MPa (30,000 psi) min |
| Elongation | 0.5% min |
| Brinell Hardness | 100 HB typical |
| Density | 8.58 g/cm³ |
| Melting Range | 760–970°C (1400–1775°F) |
International Equivalents of C91300
| Standard | Designation | Common Name |
|---|---|---|
| USA – UNS | C91300 | High Tin Bronze (81-19) |
| UK – BS 1400 | PB2 | High Tin Phosphor Bronze |
| Europe – EN 1982 | CC492K | CuSn11Pb2 |
| Germany – DIN | 2.1060 | CuSn14 |
| ISO 1338 | CuSn12 | High Tin Bronze |
| Japan – JIS H5111 | CAC403 | Tin Bronze |
Typical Applications
C91300 tin bronze castings are used for: specialized heavy-duty gears, high-hardness bearing surfaces, decorative art bronze, bell foundry applications, and extreme load slow-speed machinery components.