Heat-Treated Flint Shingle
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.
Import Duty Rates by Country of Origin
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If powdered form
Flint powder from 2515/2516 stones has dedicated granules/powder subheading.
If quartz/quartzite dominant
High quartz content flint reclassifies to quartz/quartzite heading.
If agglomerated into built-up shapes
Processed into articles moves from raw minerals to worked articles.
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Import Tips & Compliance
• Include heat-treatment process documentation and temperature logs for customs verification
• Silica content analysis prevents misclassification as general quartzite (2506.20)
Related Products under HTS 2517.10.00
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Basalt Concrete Aggregate
Crushed basalt stone aggregate with excellent compressive strength, sized for ready-mix concrete production. HTS 2517.10.00 classification due to primary use in concrete aggregates and road base. Dark color from natural iron content.
Crushed Marble Road Metal
Crushed marble chips used as road metalling material in rural roads and driveways, providing white decorative surface course. Although marble originates from heading 2515, crushing for road use brings it under HTS 2517.10.00. Angular particles ensure good compaction.
Washed Sea Shingle Ballast
Washed sea shingle consisting of rounded pebbles collected from coastal areas, sized for railway or crane mat ballast applications. HTS 2517.10.00 explicitly includes shingle for ballast uses. Natural salt content removed by washing.
Quartzite Crushed Road Aggregate
High-silica quartzite crushed to 1-2 inch size for road shoulder and base course construction. Exceptional hardness makes it ideal for heavy traffic roads under HTS 2517.10.00. Heat-treated versions improve frost resistance.
Gneiss Railway Ballast
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