BRUSH Alloy 25 attains the highest strength and hardness of any copper-base alloy. In the age-hardened condition, its tensile strength can exceed 200,000 psi and its Rockwell C hardness can reach 45. Its many applications include springs, deep-drawing parts, current-carrying springs connectors. 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, joining, and surface treatment. Filing Code: Cu-356. Producer or source: Brush Wellman Inc..