Resin-Bonded Magnesia-Carbon Refractory Brick from Mexico
High-performance refractory brick composed of over 70% magnesia (MgO) with carbon content under 30%, chemically bonded using phenolic resin or pitch. Used primarily in steel ladle linings for superior slag resistance and thermal shock performance. Classifies under 6815.91.0011 due to its specific magnesia-carbon composition and resin/pitch bonding.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Provide chemical analysis certificates verifying >70% MgO and <30% carbon content to confirm classification
• Ensure documentation specifies resin or pitch as the chemical bonding agent, distinguishing from hydraulically bonded variants