💾 Data Updated: Latest version • Last updated: December 09, 2025

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) 🖩

Details

FieldValue
Unit of Quantitykg
General Rate of Duty (Column 1 - General)Free
Special Rate of Duty (Column 1 - Special)N/A
Column 2 Rate of Duty30%
Quota QuantityN/A
Additional DutiesN/A
About Duty Rates: Rates are divided into Column 1 and Column 2. Column 1 is subdivided into General (normal trade relations rates for all countries not eligible for special programs) and Special (preferential rates for countries with free trade agreements or preference programs). Column 2 rates apply to products from Cuba, North Korea, Belarus, and Russia. When no special rate exists for a classification, General rates apply.

Overview

HTS code 6903.20.00.00 encompasses refractory ceramic goods characterized by their composition. Specifically, these articles must contain, by weight, more than 50 percent of alumina (Al2O3) or a mixture or compound of alumina and silica (SiO2). This classification applies to a variety of manufactured items utilized in high-temperature industrial processes, such as retorts, crucibles, muffles, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods, and slide gates, provided they meet the specified alumina and silica content.

This category is distinguished from its sibling, 6903.10.00.00, which covers similar refractory ceramic goods that instead contain by weight more than 50 percent of free carbon. It also differs from the "Other" category, 6903.90.00, which serves as a residual classification for refractory ceramic goods not specifically enumerated in the preceding subheadings of 6903. Therefore, the decisive factor for classification under 6903.20.00.00 is the predominant presence of alumina or alumina-silica compounds.

As a leaf node within the HTS, HTS code 6903.20.00.00 does not have further subcategories. Classification within this code is contingent upon the accurate determination of the material composition, particularly the percentage of alumina and silica. Practical classification will involve reviewing chemical analysis data for imported articles to confirm they meet the threshold for alumina or alumina-silica content as stipulated in the description.

Frequently Asked Questions

›What is HTS code 6903.20.00.00?
HTS code 6903.20.00.00 covers Containing by weight more than 50 percent of alumina (Al2O3) or of a mixture or compound of alumina and of silica (SiO2) under the US Harmonized Tariff Schedule. It falls under Chapter 69: Ceramic products.
›What products are classified under 6903.20.00.00?
This classification covers Containing by weight more than 50 percent of alumina (Al2O3) or of a mixture or compound of alumina and of silica (SiO2). It is a subcategory of 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: (6903).
›What is the import duty rate for 6903.20.00.00?
The general rate of duty for HTS 6903.20.00.00 is Free. The Column 2 rate is 30%.
›What unit of quantity is used for 6903.20.00.00?
Imports under HTS 6903.20.00.00 are measured in kg.

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