US Steel Košice approved a nine hundred million euro investment for a new electric arc furnace and air separation unit. The furnace will have annual capacity of one point six million metric tons and start in twenty thirty. It will operate alongside existing blast furnaces. The project received three hundred ninety million euros from the European Union Modernisation Fund. US Steel Košice will become Nippon Steel Slovakia in October twenty twenty-six. The investment aims to maintain steel supply reliability while reducing carbon emissions.