Resin-Bonded Magnesia Carbon Bricks from Japan
High-performance refractory bricks composed of over 70% magnesia (MgO) with carbon content under 30%, chemically bonded using phenolic resin or pitch. These bricks are designed for lining steel ladles and electric arc furnaces to withstand extreme temperatures and slag corrosion. Classified under HTS 6815.99.41.10 due to their specific magnesia-carbon composition and resin/pitch bonding.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Verify chemical composition certificate showing >70% MgO and <30% carbon content to confirm HTS classification
• Ensure supplier provides bonding agent details (resin or pitch) as documentation for customs; common pitfall is classifying as silicate-bonded
• Comply with refractory material import regs; test for hazardous substances in pitch/resin components