Alumina-basic type, agglomerated submerged arc welding flux, which is designed for butt and fillet welding and for the single- and multi-pass butt welding of mild, medium and high tensile steels in shipbuilding and steel constructions. Provides good penetration in one-side-welding and two-side-welding processes. Has a high current carriying capacity and good operating characteristics both on alternative and direct currents. Very easy slag removal in fillet and V-groves. Smooth and clean weld beads blending into base metal. Suitable to use in steel construction, shipbuilding, tank, pressure vessel and boiler production.