Applications Shielded metal arc welding of mild and 490N/ mm² high tensile steels of ships, bridges, buildings and pressure vessels. For welding of 490N/ mm² high tensile steel. Characteristics on usage - LB-52-18 is an iron powder low hydrogen type covered electrode for all position welding. - The mechanical properties of the weld metal are the same as LB-52. - Its usability by direct current is the best among low hydrogen type electrodes.