HS Code for Alumina refractories

Alumina refractories are classified under HS code 6903.20 because they are refractory ceramic goods characterized by a high alumina content. Chapter 69 covers "Ceramic products." Heading 6903 specifically addresses "Other refractory ceramic goods (for example, retorts, crucibles, muffles, nozzles, plugs, supports, cupels, tubes, pipes, sheaths and rods), other than those of siliceous fossil meals or of similar earths." The subheading 6903.20 precisely defines these goods as "Containing by weight more than 50% of alumina or of a mixture or compound of alumina and of silica." This classification is critical as the high alumina content directly correlates with the refractory properties, such as resistance to high temperatures and chemical attack, which are essential for their industrial applications.

Products Included

• High-alumina refractory bricks
• Alumina-silica refractory castables with >50% alumina
• Refractory ceramic crucibles with high alumina content
• Alumina refractory linings for furnaces
• Specialized refractory shapes made predominantly of alumina

Common Misclassification

Common misclassification for alumina refractories might occur with other refractory ceramic goods that do not meet the 50% alumina threshold. For instance, refractory goods with a lower alumina content or those primarily based on silica might fall under HS code 6902 (Refractory bricks, blocks, tiles and similar ceramic constructional goods, other than those of siliceous fossil meals or similar earths). Specifically, 6902.20 covers "Containing by weight more than 50% of alumina (Al2O3), of silica (SiO2) or of a mixture or compound of these products." The distinction between 6902 and 6903 lies in whether they are "bricks, blocks, tiles" (6902) or "other refractory ceramic goods" (6903). Additionally, confusion with non-refractory ceramic products (e.g., Chapter 69, other headings) is possible if the refractory nature is overlooked.

FAQ

What is the HS code for Alumina refractories?

The HS code for alumina refractories is 6903.20. This code applies to refractory ceramic goods containing by weight more than 50% of alumina or a mixture/compound of alumina and silica, excluding those made from siliceous fossil meals.

What is the significance of the 50% alumina content in classification?

The 50% alumina content threshold is a critical determinant for classification under HS code 6903.20. It distinguishes high-alumina refractories, which possess superior high-temperature resistance and chemical stability, from other refractory materials with lower alumina concentrations or different primary compositions, ensuring precise categorization based on material properties and performance.