Section 15 Base metals and articles of base metal 81 Other base metals; cements; articles thereof 81 01 Tungsten (wolfram) and articles thereof, including waste and scrap. Commodity Code Description 81 01 10 Powders 81 01 94 Unwrought tungsten, including bars and rods obtained simply by sintering 81 01 96 Wire 81 01 97 Waste and scrap 81 01 99 Other