Heat-Treated Flint Shingle from Japan
Heat-treated flint shingle, crushed and screened for use in concrete aggregates or road surfacing, providing silica-rich durability. Specifically listed in HTS 2517.10.00 as shingle and flint suitable for construction aggregates. Thermal processing enhances fracture resistance.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• Include heat-treatment process documentation and temperature logs for customs verification
• Silica content analysis prevents misclassification as general quartzite (2506.20)