Cobalt Discs
Circular cobalt discs for sealing rings and wear plates in valves. As machined articles of cobalt, under HTS 8105.90.00.00. High wear resistance defines use.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If valve gasket sets
Discs sold as gasket/sealing sets classify under Chapter 84 gaskets.
If millstones or grindstones
Cobalt-bonded grinding wheels go to Chapter 68 worked stones.
If parts of cranes
Wear discs for crane parts become Chapter 84 machinery components.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Machining tolerance docs prove finished disc status vs. rough blanks
• Group in sets only if matching note criteria for assembled goods
• Surface finish specs avoid reclass as polished Chapter 81 wares
Related Products under HTS 8105.90.00.00
Cobalt Wire
High-purity cobalt wire used in electronics and medical applications, such as thermocouples and implants. Classified under HTS 8105.90.00.00 as an article of cobalt, not a matte or intermediate product. Meets the chapter definition for cobalt content exceeding other metals.
Cobalt Rods
Solid cobalt rods employed in aerospace alloys and cutting tools due to high strength. Falls under HTS 8105.90.00.00 as 'other articles thereof,' excluding waste/scrap or intermediates. Primary cobalt content defines classification per US notes.
Cobalt Powder
Fine cobalt powder for powder metallurgy in battery cathodes and hardfacing. HTS 8105.90.00.00 covers unwrought forms like powder as cobalt articles, distinct from mattes. Excludes alloys per chapter alloy definition.
Cobalt Foil
Thin cobalt foil for evaporation targets in thin-film deposition and shielding. As a fabricated article of cobalt, it fits HTS 8105.90.00.00 'other,' with cobalt >99% weight per notes. Used in semiconductor manufacturing.
Cobalt Targets
Sputtering targets made of pure cobalt for PVD coating in microelectronics. HTS 8105.90.00.00 includes shaped articles like targets as 'other' cobalt products. High purity essential for vacuum deposition.
Cobalt Sheets
Rolled cobalt sheets for chemical processing equipment due to corrosion resistance. Under HTS 8105.90.00.00 as other articles, with cobalt as base metal >99%. Used in valve and pump fabrication.