Copper nickel 90/10 tube are used in ships, power plants, hydraulic lines and in offshore fire water systems. Its chemical composition is Nickel 10.5, Iron 1.5, Manganese 0.75 and the remainder is Copper. Because of its high ductility and toughness, 90/10 copper nickel tubing are very popular for use in industrial applications and architectural applications. The Ultimate Tensile Strength of Cu-Ni 90/10 Tube is 300 - 310 N/mm2. The 0.2% Proof Strength of 90/10 CU NI Tube is 105 N/mm2.