Chromium-Corundum Refractory Bricks from Mexico
High-chrome corundum bricks with Cr2O3>50% for glass furnace superstructures resisting batch carryover. Dense microstructure prevents glass penetration. Covered by HTS 6902.10.50.00 for chromium oxide dominant refractories.
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 glass contact test data demonstrating non-wetting properties
• Declare apparent porosity (<15% typical) confirming density
• Separate from melting end refractories with different compositions