Section 15 Base metals and articles of base metal 81 Other base metals; cements; articles thereof 81 05 Cobalt mattes and other intermediate products of cobalt metallurgy; cobalt and articles thereof, including waste and scrap. 81 05 30 Waste and scrap 81 05 30 00 Waste and scrap Commodity Code Description 81 05 30 00 000 Waste and scrap