Agglomerated aluminate-basic flux for Submerged Arc Welding particular for applications with high dilution from the base material, e.g. butt welds with one run from each side or fillet welds. Good impact properties due to high alloying of Mn and Si. Especially designed to use with OK Autrod 12.10, OK Autrod 12.20 and similar. Mainly for shipbuilding, also for pressure vessels, transport industries, general constructions, etc. Suitable for single and multi wire procedures, for DC and AC welding. Intended for a limited number of passes and plate thickness up to about 25 mm.