Direct-Bonded Magnesia Refractory Bricks from Canada
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 — Canada → United States
10%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Microstructure photos prove direct bonding vs. matrix bonding
• High purity (>96% MgO) affects duty valuation tier
• Declare hydration resistance test results