Low Porosity Fireclay Bricks from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Apparent porosity <18% certification required
• Cold crushing strength documentation (>300 kg/cm²)
• Specify reheat linear change test results