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Product Details
CuSn12Pb1 Bronze Casting
CuSn12Pb1 Bronze Casting is a high-tin leaded bronze specified under ISO 1338 CuSn12Pb1, containing nominally 87% copper, 12% tin, and 1% lead. The small lead addition improves machinability while retaining the exceptional hardness of the 12% tin composition for precision gear and bearing applications. Indicative price: US$ 11.20/kilogram.
CuSn12Pb1 Chemical Composition (ISO 1338)
| Element | Min % | Max % |
|---|---|---|
| Copper (Cu) | rem | — |
| Tin (Sn) | 11.0 | 13.0 |
| Lead (Pb) | 0.5 | 1.5 |
| Phosphorus (P) | 0.01 | 0.40 |
| Zinc (Zn) | — | 0.10 |
| Iron (Fe) | — | 0.15 |
CuSn12Pb1 Mechanical Properties (Sand Cast – ISO 1338)
| Property | Value |
|---|---|
| Tensile Strength | 275 MPa min |
| Yield Strength (0.2%) | 150 MPa min |
| Elongation | 5% min |
| Brinell Hardness | 90 HB typical |
| Density | 8.65 g/cm³ |
International Equivalents of CuSn12Pb1
| Standard | Designation | Common Name |
|---|---|---|
| ISO 1338 | CuSn12Pb1 | Leaded High Tin Bronze |
| Europe – EN 1982 | CC492K | CuSn11Pb2 |
| Germany – DIN | 2.1060 | CuSn14 |
| UK – BS 1400 | PB2 | High Tin Phosphor Bronze |
| USA – UNS | C91100 | High Tin Bronze |
| Japan – JIS H5111 | CAC403 | Tin Bronze |
Typical Applications
CuSn12Pb1 bronze castings are used for: precision worm gear wheels, machinable high-load bearings, bridge bearings, wear plates, piston rings, and critical engineering components requiring both hardness and improved machinability.