Tungsten Carbide Ceramic Grinding Discs
Fired tungsten carbide ceramic grinding discs for sample preparation in geological labs. These discs meet the 9+ Mohs hardness requirement, qualifying as technical ceramic ware under tariff item 6909.12.90. They are suitable for rock and mineral pulverization due to their durability.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | 4.5% | — | 4.5% |
| 🇲🇽Mexico | 4.5% | — | 4.5% |
| 🇺🇸United States | 4.5% | — | 4.5% |
| 🇩🇪Germany | 4.5% | — | 4.5% |
| 🇯🇵Japan | 4.5% | — | 4.5% |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the discs are mounted as interchangeable tools
Interchangeable tools of Chapter 82 are excluded from Chapter 69.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Ensure the discs are fired ceramic, not metal-bonded, to qualify under Chapter 69
• Provide hardness test reports for customs
• Classify as laboratory equipment for accurate duty assessment
Related Products under Tariff item 6909.12.90
Alumina Crucible for Laboratory Use
High-purity alumina crucible designed for high-temperature melting and analysis in chemical laboratories. Its sintered aluminum oxide composition achieves a hardness of 9 on the Mohs scale, meeting Chapter 69 requirements for fired ceramic products. This item is classified under tariff item 6909.12.90 as other ceramic wares for laboratory or technical uses.
Aluminum Oxide Technical Packing Jars
Dense aluminum oxide jars used for packing corrosive goods in chemical transport. These fired ceramic jars have a hardness exceeding 9 on the Mohs scale, making them impervious to most reagents. They fall under tariff item 6909.12.90 as other technical ceramic wares for conveyance.
Boron Nitride Crucible for Technical Furnaces
Hexagonal boron nitride ceramic crucible for high-purity melting in semiconductor laboratories. This fired ceramic achieves a Mohs hardness over 9, qualifying it as a technical ware under tariff item 6909.12.90. It offers excellent thermal shock resistance for demanding applications.
Fused Silica Distillation Flask
Fused silica distillation flask for precise distillation in chemical research laboratories. The fired ceramic body reaches a Mohs hardness of 9 or more, meeting Chapter 69 criteria for technical ceramic wares. Its translucent, low-absorption properties make it ideal for handling volatile compounds.
High-Purity Alumina Evaporating Dishes
High-purity alumina evaporating dishes for solvent evaporation in chemistry labs. These 99.8% alumina ceramic dishes have a hardness equivalent to 9+ on the Mohs scale, qualifying as technical ceramic ware. They are chemically inert and thermally stable for laboratory use.
Silicon Carbide Laboratory Mortar and Pestle
Fired silicon carbide mortar and pestle set for grinding hard samples in analytical chemistry labs. Exhibiting a Mohs hardness of 9.5, this set qualifies as technical ceramic ware under tariff item 6909.12.90. It offers high resistance to acids and wear for demanding applications.