Section 15 BASE METALS AND ARTICLES OF BASE METAL 81 OTHER BASE METALS; CERMETS; ARTICLES THEREOF 81 05 COBALT MATTES AND OTHER INTERMEDIATE PRODUCTS OF COBALT METALLURGY, COBALT Commodity Code Description 81 05 20 COBALT MATTES & OTH INTERMEDIATE PRODUCTS OF COBALT METALLURGY;...;POWDERS 81 05 30 WASTE AND SCRAP OF COBALT 81 05 90 OTHER COBALT AND ARTICLES THEREOF