A CHROMIUM ALLOYED STEEL IS MANUFACTURED IN THIS WAY. MOLTEN IRON, CONTAINING CARBON AND ALLOYING SUBSTNCES, IS MIXED WITH CHROMIUM OXIDE AND A SLAG FORMING AGENT, THE ALLOYING SUBSTANCES ARE OXIDIZED TO FORM SLAG. THE CHROMIUM OXIDE IS REDUCED TO METALLIC CHRONIUM. THE SLAG IS REMOVED. THE MOLTEN METAL IS NOW REFINED BY MEANS OF OXYGEN, RESULTING IN THE CARBON CONTENT DROPPING FROM 2 TO 0.2% AND THE TEMPERATURE INCREASING TO 1700*C.