Copper-nickel tube UNS C70400 has a copper content of not less than 92.4%. Copper nickel alloys, also known as Cu-Ni, offers excellent corrosion resistance, especially in marine salt water environments. Copper nickel alloys that are generally chosen for sea water parts and service equipment contains 10 to 30 percent nickel. Longda Metal produces C70400,C70600, C71500 and C71640 Copper Nickel pipes, which are commonly used in seawater piping due to its complete resistance to barnacles. Due to Its resistance of various sea organisms, this alloy makes seawater desalination, water systems, fire fighting systems, and similar applications very reliable. These various alloys also have important additions of iron and manganese, which are necessary to maintain good corrosion resistance in the harsh environments.  Standard Grade ASTM B 111 C70400 GB/T8890 Bfe5-1.5-0.5 Cu Remainder Remainder Ni 4.8-6.2 4.8-6.2 Lead 0.05 max 0.05 max Fe 1.3-1.7 1.3-1.7 Zn 1.0 max 1.0 max Mn 0.3-0.8 0.3-0.8 Condition O61 O61 H55 H55 Yield Strength N/mm2 85 min 85 min 205 min 205 min Tensile Strength N/mm2 260 min. 260 min. 275 min. 275 min. Typical  use covering industries including “Air Coolers for Marine Diesel Engines” “Power Generation Engines” “Gas Engines” “Condensers for Industrial Steam Turbines” “Industrial Heat Exchangers” “Heat Exchangers For Seawater Desalting Plants” “Automobile Brake Line System” etc Density (20°C): 8,94 g/cm3 • Cold Working Properties: Good Weight Formula Average Wall: (OD-WT) x WT x 0,0284= Kg/m (all sizes in mm) Minimum Wall: (OD-WT) x WT x 0,0295 = Kg/m (all sizes in mm)