Cast copper-lead alloys

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.

Chemical compositions of some cast copper-lead alloys

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