Welding wire electrode, Cu coated in combination with flux is suitable for welding of construction steels, boiler steels and shipbuilding steels. It is used for making butt welds and fillet welds in general purpose steel constructions, pressure vessels. Generally used by Pipe manufacturers for welding API grade pipes upto X52 and for water pipeline applications. Welding wire of diameters in the range from 2.0 to 5.0mm. Larges diameters are produced upon a beforehand made agreements.