Low Porosity Fireclay Bricks from Mexico
Low porosity fireclay refractory bricks minimize slag penetration in blast furnace stove checkers through dense vitrified structure from high firing. Balance insulation with strength. Standard classification HTS 6902.90.10.
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
• Apparent porosity <18% certification required
• Cold crushing strength documentation (>300 kg/cm²)
• Specify reheat linear change test results