Sunraj Industries manufacture, exports and supplies 70/30 Cupro Nickel Tubes which is a 70% copper 30% nickel alloy, offering improved levels of corrosion resistance in marine and salt water environments. 70/30 Cupro Nickel Tube widely used for Heat Exchangers, High Capacity Power Plants, Ship Building & Ship Repairs, Condensers, Offshore Oil rigs, Distiller Tubes, Evaporators.