8105 - Cobalt mattes and other intermediate products of cobalt metallurgy; cobalt and articles thereof, including waste and scrap:

This HTS category, 8105, encompasses cobalt in various forms, from intermediate metallurgical products to finished articles. It specifically includes cobalt mattes, which are intermediate materials derived from the smelting of cobalt ores, and other processing byproducts of cobalt metallurgy. Furthermore, the scope extends to unwrought cobalt metal, cobalt powders, and any manufactured articles made of cobalt, including both new and used materials categorized as waste and scrap.

Distinguishing this category from its siblings at the Section XV, Chapter 81 level, it is crucial to note that 8105 is exclusively dedicated to cobalt. Other base metals and their articles are classified under different HTS headings within Chapter 81 (e.g., magnesium, beryllium, tungsten) or in preceding chapters covering more common base metals like iron, copper, or aluminum. This heading ensures specialized treatment for cobalt and its associated products.

Within this category, the subheadings provide further refinement. 8105.20 distinguishes between intermediate products and unwrought cobalt and powders, highlighting different stages of material refinement. 8105.30.00.00 specifically addresses cobalt waste and scrap, recognizing its distinct commercial and processing value. Finally, 8105.90.00.00 acts as a residual category for any other cobalt-containing articles not specifically detailed elsewhere within the 8105 classification.