A Copper Nickel Alloy in the ratio of 9010 that has very high erosion and corrosion resistance. It has very high weld ability, easy for installation and are used for Condensers, Ship building, Refineries etc. A Copper Nickel Alloy in the ratio of 7030 having small amount of iron and manganese to improve corrosion resistance in high velocity waters. The alloy is relatively insensitive to stress corrosion & has good cold and hot working properties and is readily weld able. These tubes are used for Condensers, Ship building, Evaporators, High capacity Power plants etc.