... and rollers2, Cutting tools3, Engine moving parts-valves,turbocharger rotors4, Engine wear parts-cam followers, ... of Alumina)4, Chemical inertness5, Resistance to molten metals6, Lonic electrical conduction7, Wear resistance8, High fracture toughness9, High hardnessTypical Uses1, Precision ball valve ... metal extrusion dies6, Deep well down –hole valves and seats7, Powder compacting dies8, Marine pump ...