Resin-Bonded Magnesia-Carbon Refractory Brick from China
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 — China → United States
37.5%
Rate breakdown
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
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