Tungsten Carbide Buttons for Rock Drilling
Hemispherical tungsten carbide buttons inserted into drill bits for mining and rock drilling. These sintered, unmounted carbide pieces provide extreme hardness for penetrating hard rock and are classified under tariff item 2849.90.00 as other carbides.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the buttons are mounted on drill bits
Drill bits with carbide buttons are classified as interchangeable tools.
If imported as parts of boring or sinking machinery
Carbide buttons for mining machinery may be classified as parts.
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
• Confirm the buttons are unmounted and not yet inserted into drill bits to stay under this tariff item
• Provide CBSA with the chemical composition certificate for tungsten carbide
• Check if the mining application requires any additional permits
Related Products under Tariff item 2849.90.00
Amorphous Boron Carbide Granules 10-50 Micron
Amorphous boron carbide granules in the 10-50 micron range, used as a metallurgical additive and ceramic raw material. This chemically defined boron carbide compound is classified under tariff item 2849.90.00 as a carbide, whether or not chemically defined, other than those specified elsewhere.
Boron Carbide Abrasive Grit
Boron carbide (B4C) grit used in high-performance abrasives and armor materials. Classified under tariff item 2849.90.00 as other chemically defined carbides, excluding metal-sintered cermets, ideal for nozzle linings and cutting.
Boron Carbide Abrasive Micro-Powder F220
F220 grit boron carbide micro-powder standardized for precision lapping and polishing of semiconductors and optics. This chemically defined boron carbide powder is classified under tariff item 2849.90.00 as a carbide, whether or not chemically defined, in powder form.
Boron Carbide Powder B4C 99% Purity
High-purity boron carbide powder with 99% purity, used as an abrasive in polishing and grinding. This chemically defined inorganic compound of boron is classified under tariff item 2849.90.00 as a carbide, whether or not chemically defined.
Boron Carbide Sputtering Target Material
High-density boron carbide material prepared for thin-film deposition via sputtering in semiconductor manufacturing. This chemically defined boron carbide in raw target form is classified under tariff item 2849.90.00 as a carbide, whether or not chemically defined.
Chromium Carbide Additive for Cermets
Granular chromium carbide (Cr3C2) in the 10-50 micron range, specifically for mixing into cermet powder formulations for powder metallurgy. This chemically defined chromium carbide is classified under tariff item 2849.90.00 as a carbide, whether or not chemically defined.