Magnesia-Chrome Refractory Bricks from Mexico
High-density refractory bricks composed of more than 50% MgO and Cr2O3, fired after shaping to withstand extreme temperatures in industrial furnaces. These bricks are used in rotary kilns and non-ferrous metal smelters for their superior corrosion resistance. Classified under HTS 6902.10.50.00 due to high magnesium and chromium oxide content and refractory properties.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Verify chemical composition certificates showing >50% MgO, CaO or Cr2O3 to confirm classification and avoid reclassification to lower-duty codes
• Ensure firing temperature records exceed 800°C as per Chapter 69 notes to distinguish from non-refractory ceramics
• Comply with EPA hexavalent chromium regulations for chrome-containing refractories during import declaration