Concast C89833 is a lead-free casting alloy that can be interchangeable with C836 (Alloy Digest Cu-317, August 1976). C89833 is classified as a bismuth tin bronze. See also Federalloy I-844, Alloy Digest Cu-611, March 1997. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. Filing Code: Cu-891. Producer or source: Concast Metal Products Company.