COPPER No. 104, 105 and 107 are oxygen-free coppers containing silver to raise the softening temperature and improve the elevated-temperature properties. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as creep and fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-259. Producer or source: Copper and copper alloy mills.