Magnesia Carbon Brick Inserts from Canada
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 — Canada → United States
10%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Carbon content <20% keeps classification at 6815.91
• BOF end-use letters prevent Chapter 69 shift
• Avoid 'graphite brick' terminology