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2849.90.10.00

Carbides, whether or not chemically defined / Of boron

Classification path

  1. Carbides, whether or not chemically defined
  2. Other
  3. Of boron

Rates of duty

General (MFN)
3.7%
Column 2Cuba, North Korea, Russia, Belarus
25%
Unit of quantity
kg

Trade agreement rates

FreeGSP (lapsed since Dec 31, 2020), U.S.-Australia FTA, U.S.-Bahrain FTA, U.S.-Chile FTA, U.S.-Colombia TPA, AGOA (authorized through Dec 31, 2026), E, U.S.-Israel FTA, U.S.-Jordan FTA, U.S.-Korea FTA, U.S.-Morocco FTA, U.S.-Oman FTA, CAFTA-DR, U.S.-Panama TPA, U.S.-Peru TPA, USMCA, U.S.-Singapore FTA

Related lines in heading 2849

About heading 2849

Carbides, whether or not chemically defined

Heading 2849 covers carbides, which are compounds of carbon with a metal or with silicon or boron, whether or not chemically defined. The heading is split first by the element: calcium carbide, silicon carbide, and other carbides. Silicon carbide is split further by form, with crude material separated from grains or ground, pulverized or refined material, and the other carbides are split by the specific element such as boron, chromium or tungsten.

Full guide to heading 2849

Products in this heading

  • Calcium carbide lumps used to generate acetylene
  • Crude silicon carbide ingots or furnace product
  • Silicon carbide grains and powders for abrasives or refractories
  • Boron carbide powder for armor or abrasive use
  • Chromium carbide powder for thermal spray or hardfacing
  • Tungsten carbide powder for cemented carbide production
  • Mixed or unspecified metal carbide powders

Frequently asked questions

What is the HTS code for silicon carbide?

Crude silicon carbide is 2849.20.10.00, which carries a general (MFN) rate of Free. Silicon carbide in grains, or ground, pulverized or refined is 2849.20.20.00 at a general (MFN) rate of 0.5%.

What is the duty on tungsten carbide?

Tungsten carbide is classified under 2849.90.30.00 and the general (MFN) rate is 5.5%.

How do I classify calcium carbide?

Calcium carbide falls under 2849.10.00.00 at a general (MFN) rate of 1.8%, regardless of whether it is chemically defined.

Source: USITC Harmonized Tariff Schedule, retrieved October 21, 2026.

HTS 2849.90.10.00: Carbides, whether or not chemically defined / Of boron, 3.7% duty | HTSBase