Copper Alloy No. C90700 is a cast copper-tin alloy known also by names formerly used (but not recommended): Tin Bronze, 205 and 89-11. It is a medium-strength alloy and has a good combination of strength, ductility and resistance to corrosion. Among its many uses are gears, bearings, bushings and marine hardware. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Cu-460. Producer or source: Copper alloy foundries.