Section 15 Base metals and articles of base metal 81 Other base metals; cements; articles thereof 81 03 Tantalum and articles thereof, including waste and scrap. 81 03 20 Unwrought tantalum, including bars and rods obtained simply by sintering; powders Commodity Code Description 81 03 20 00 Unwrought tantalum, including bars and rods obtained simply by sintering; powders