COPPER ALLOY NO. C18090 is a strip alloy, not hardenable by heat treatment. It may be hardened and strengthened by cold work. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fatigue. It also includes information on forming, heat treating, machining, and joining. Filing Code: Cu-569. Producer or source: Copper and copper alloy mills. See also Alloy Digest Cu-558, March 1991.