HS Code for Magnesite bricks

Magnesite bricks are classified under HS code 6815.91 when they are composed of magnesite, magnesia (periclase), or dolomite but do not meet the criteria for refractory goods classified in Chapter 69. Heading 6815 covers articles of stone or other mineral substances not elsewhere specified. Subheading 6815.91 specifically identifies articles containing magnesite, magnesia in the form of periclase, dolomite (including dolime), or chromite. The distinction often depends on whether the bricks have been fired at high temperatures to achieve a ceramic bond. If the bricks are chemically bonded or unfired, they remain in Chapter 68. However, if they are fired refractory bricks used for lining furnaces, they are frequently scrutinized against Heading 6902. The presence of magnesium oxide (MgO) is the primary chemical marker for this classification. These articles are used in industrial applications where resistance to basic slags and high temperatures is required, such as in the steel and cement industries. The classification ensures that non-ceramic mineral products are grouped separately from traditional fired ceramics, focusing on the mineralogical composition rather than just the heat-resistant properties.

Products Included

• Unfired magnesite-based bricks
• Chemically bonded magnesia-chrome bricks
• Articles containing periclase for industrial lining
• Dolomite-based mineral blocks
• Non-refractory magnesite shapes for construction

Common Misclassification

Magnesite bricks are most often misclassified under 6902.10, which covers refractory bricks containing more than 50% MgO, CaO, or Cr2O3. The difference lies in the manufacturing process; Chapter 69 requires the articles to be fired as ceramics. Another misclassification is 2519, which is for the raw mineral magnesite or magnesium oxide. If the material has been shaped into a specific article like a brick, it must move from Chapter 25 to Chapter 68 or 69.

FAQ

What is the HS code for magnesite bricks?

The HS code for articles containing magnesite, magnesia, or dolomite (including bricks) is 6815.91.

Are all heat-resistant bricks classified here?

No, most fired refractory bricks used in furnaces are classified under Heading 6902; 6815.91 is for specific mineral compositions that are often unfired or chemically bonded.