Heading 6903: Other refractory ceramic goods (for example, retorts, crucibles, muffles, nozzles, plugs…
Every line of heading 6903 in the U.S. Harmonized Tariff Schedule, with its general (column 1) duty rate. Open a code for the landed cost calculator, trade agreement rates and email alerts if the rate changes.
Other refractory ceramic goods (for example, retorts, crucibles, muffles, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods and slide gates), other than those of siliceous fossil meals or of similar siliceous earths
Chapter 69: Ceramic products. Schedule checked on November 8, 2026.
Not always the total: additional chapter 99 duties (such as Section 232 or Section 301), antidumping or countervailing duties may apply depending on the country of origin. See recent chapter 99 changes →
Tariff lines
| HTS code | Official description | General rate |
|---|---|---|
| 6903.10.00.00 | Containing by weight more than 50 percent of free carbon | Free |
| 6903.20.00.00 | Containing by weight more than 50 percent of alumina (Al2O3) or of a mixture or compound of alumina and of silica (SiO2) | Free |
| 6903.90.00 | Other | Free |
| 6903.90.00.10 | Of clay | |
| 6903.90.00.50 | Other |
Exporting this product from the U.S.?
Exports are reported with Schedule B numbers. Heading 6903 has 4 of them. Schedule B lookup →
- 6903.10.0000OTHER REFRACTORY CERAMIC GOODS (RETORTS, CRUCIBLES, TUBES, ETC) CONTAINING MORE THAN 50 PERCENT GRAPHITE OR OTHER FORMS OF CARBON OR A MIXTURE OF THEM
- 6903.20.0000REFRACTORY CERAMIC GOODS NESOI CONTAINING BY WEIGHT OVER 50 PERCENT OF ALUMINA OR OF A MIXTURE OR COMPOUND OF ALUMINA AND SILICA
- 6903.90.0010OTHER REFRACTORY CERAMIC GOODS (RETORTS, CRUCIBLES, ETC), OF CLAY, NESOI (NOT SILICEOUS, NOT 50 PCT GRAPHITE OR ALUMINA MIXTURES)
- 6903.90.0050OTHER REFRACTORY CERAMIC GOODS (RETORTS, CRUCIBLES, ETC), NONCLAY, NESOI (NOT SILICEOUS, NOT 50 PCT GRAPHITE OR ALUMINA MIXTURES)
Source: U.S. International Trade Commission, Harmonized Tariff Schedule; Schedule B: U.S. Census Bureau. Information only, not legal or customs advice; U.S. Customs and Border Protection decides the classification and the duty. Confirm with a licensed customs broker before you ship.
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