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.
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