STRONG EF4 is a medium carbon Mn-Ni-Cr-Mo alloyed, copper coated wire for the Submerged Arc Welding of similar composition high strength, quenched & tempered steels. The weld metal will possess high tensile strength & radiographic quality. Especially suitable for vessel construction & welding of pipes and tubes of matching compositions for power plants, refineries, petrochemicals, fertilizers plants etc.