Direct-Bonded Magnesia Refractory Bricks from Japan
Direct-bonded magnesia refractory bricks achieve superior purity through high-temperature firing that creates ceramic bonding between periclase grains. Used in converter mouths and hot metal ladles. HTS 6902.90.10 for advanced bonding technology bricks.
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
• Microstructure photos prove direct bonding vs. matrix bonding
• High purity (>96% MgO) affects duty valuation tier
• Declare hydration resistance test results