Copper Alloy No. C15100 is an age-hardenable zirconium-copper lead frame alloy. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on forming, heat treating, machining, and joining. Filing Code: CU-552. Producer or source: Copper and copper alloy mills. Originally published April 1990, revised October 1994.