Submerged arc welding process for nickel containing steel

Abstract From the Canadian patent

Submerged arc welding for nickel containing steel such as steel containing 3.5 weight percent of nickel. The process uses a bond type of flux of specific composition to suppress the oxygen content in the weld metal. Further the process, utilizes a cored welding wire including a core material of specific composition. As the result, it is possible to obtain a weld metal of high impact-resistance at low temperature such as minus 100°C. The welding electrode is a cored wire consisting of a mild steel and core material, the core material including, on the basis of weight to the total weight of the welding electrode, 5 to 25 percent of CaF2, 2.5 to 5.5 percent of nickel O to 0.5 percent of Mo, 0 …