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to Metals
to Copper alloys
Dr. Dmitri Kopeliovich
According to the Unified Numbering System (UNS):
Cast Copper-Lead Alloys (Leaded Coppers) are copper alloys, containing 24-51% of lead (Pb) as the major alloying element. Cast Copper-Lead alloys are designated with the numbers from C98000 through C98999.
Cast Copper-Nickel alloys may contain up to 3% of tin (Sn), and up to 5% of silver (Ag) as additional alloying elements.
Cast Copper-Lead alloys possess binary microstructure, consisting of lead particles distributed throughout the copper matrix.
Lead in the Cast Copper-Lead alloys serves as a solid lubricant in sliding friction applications.
Cast Copper-Lead alloys are used for manufacturing sliding bearings, bushings and other sliding friction components.
| UNS Designation | Pb,% | Sn,% | Cu,% |
|---|---|---|---|
| C98200 | 21.0-27.0 | 0.6-2.0 | balance |
| C98400 | 26.0-33.0 | 0.5 max. | balance |
| C98600 | 30.0-40.0 | 0.5 max. | 60.0-70.0 |
| C98800 | 37.5-42.5 | 0.25 max. | 56.5-62.5 |
| C98820 | 40.0-44.0 | 1.0-5.0 | balance |
| C98840 | 44.0-58.0 | 1.0-5.0 | balance |


