RAW AND PARTLY FINISHED LOW-GRADE METALS AND THEIR ALLOYS, CAST COMPONENTS, HIGH-GRADE METALS AND THEIR ALLOYS AS WELL AS PRODUCTS MADE USING THESE METALS, NAMELY VALVE SEAT RINGS, CYLINDER SLEEVE INSERTS, VALVE GUIDES, CENTRIFUGALLY MOLDED CASTINGS, HYDRAULICALLY MOLDED CASTINGS, SPHEROID CASTINGS AND MOLDED CASTINGS