Dinas Earth Refractory Grogs from Japan
Dinas earth grogs are siliceous chamotte materials derived from quartzite clays, calcined for use as grog in high-silica refractories for steelmaking ladles. Classified under HTS 2508.70.00.00 due to its definition as dinas earth, a specific refractory clay not further manufactured. It provides skeletal structure in refractory mixes without being expanded or shaped.
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
• Provide lab analysis showing high silica content (>93%) typical of dinas earth; declare as 'refractory grog' not finished product to prevent Chapter 69 shift; watch for moisture content affecting weight-based duties