Calcined Flint Powder Road Dusting
Calcined flint powder, produced by heat-treating flint and then grinding, is used for road surface dusting and stabilization. The heat treatment does not alter the mineral structure beyond what is allowed for heading 2517, and the product serves as a powder for road metalling. It falls under tariff item 2517.10.00, which includes flint and heat-treated stone products.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
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 the flint powder is not heat-treated and is used as granules or powder of stone
This subheading covers granules, chippings and powder of stone of heading 2515 or 2516, which may include flint powder.
If the product is natural sand, not flint powder
Heading 2505 covers natural sands of all kinds, including silica sands, which are distinct from crushed stone powders.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Verify that the flint powder is not mixed with chemical additives, as that could exclude it from Chapter 25
• Keep records of the heat-treatment process to show it is within the scope of the heading
• Check if the powder is considered a hazardous material for transport, as flint dust may require special handling
Related Products under Tariff item 2517.10.00
1 Inch Clean Concrete Wash Gravel
Washed 1 inch gravel free of fines, used in concrete washout pits and drainage applications. Prevents clogging in precast concrete production and classifies under tariff item 2517.10.00 as clean concrete aggregate gravel.
3/4 Inch Crushed Limestone Gravel
Angular crushed limestone gravel sized 3/4 inch, ideal for road base and concrete mixing. Provides excellent compaction for driveways and parking lots, and is classified under tariff item 2517.10.00 for gravel used in concrete aggregates.
ASTM C33 #67 Coarse Concrete Gravel
Precisely graded 1/2 x 3/8 inch gravel meeting ASTM C33 Size #67 for concrete coarse aggregate. Essential for high-strength structural concrete production and classifies under tariff item 2517.10.00 as pebbles or gravel commonly used for concrete.
Basalt Concrete Aggregate
Crushed basalt stone aggregate with excellent compressive strength, sized for ready-mix concrete production. Its primary use as a concrete aggregate and road base material places it under tariff item 2517.10.00, which covers broken or crushed stone of a kind commonly used for these purposes.
Basalt Pebbles 1-2 Inch Railway Ballast
Basalt pebbles, sized 1 to 2 inches, are used as railway ballast to provide track stability and drainage. They are sourced from crushed basalt of heading 2514 but have been processed into pebbles for aggregate use, fitting the scope of tariff item 2517.10.00. The product is not heat-treated and is presented in bulk for rail construction.
Concrete Ready-Mix Aggregate Gravel
Pre-washed 57 stone gravel blend, graded 3/4 to 1 inch, specifically for ready-mix concrete production. The washing and grading are mechanical processes permitted by Chapter Note 1, and the product's size and angularity make it suitable as concrete aggregate under tariff item 2517.10.00.