COPPER Alloy No. 170 is a wrought, heat treatable beryllium-copper alloy offering high strenght, toughness, and corrosion resistance. 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 forming, heat treating, machining, and joining. Filing Code: Cu-190. Producer or source: Brush Beryllium Company.