Magnesia Carbon Brick Inserts from Mexico
Magnesia matrix inserts with carbon additives for BOF vessel linings. Classified HTS 6815.91.00 for primary magnesite content despite carbon. Used in basic oxygen furnace steelmaking.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Carbon content <20% keeps classification at 6815.91
• BOF end-use letters prevent Chapter 69 shift
• Avoid 'graphite brick' terminology