U.S. imports of Macadam of Slag, Dross, or Similar Industrial Waste (HS 251720) totaled $679K in August 2026, imported from 1 country.
Macadam of Slag, Dross, or Similar Industrial Waste imports of $679K in August 2026 ran 31% below the year-to-date monthly average of $977K.
Last updated: August 2026 dataMacadam produced from metallurgical slag, dross, or comparable industrial by-products is classified under a single tariff line (2517200000) and serves primarily as a road-building and construction aggregate material. Unlike natural stone aggregates, this product is derived from industrial processing waste — typically from steel, iron, or non-ferrous smelting operations — and its composition can vary significantly by source industry. Canada is the dominant US supplier, reflecting the integrated North American steel industry and the cost efficiency of cross-border slag aggregate shipments.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
1 import shipments a month
Slag macadam (2517200000) is specifically composed of processed industrial by-products — such as blast furnace slag or non-ferrous smelting dross — rather than quarried natural stone. Natural pebbles, gravel, and crushed stone are classified under heading 251710. The key classification factor is the origin of the material: industrial processing waste versus geological extraction.
Slag and dross materials can be subject to EPA scrutiny depending on their composition and whether they are classified as solid waste or a commercial product under RCRA. Importers should obtain documentation from the foreign supplier confirming the slag's industrial origin, processing method, and that it meets applicable specifications for use as a construction aggregate, to support its classification as a commercial product rather than a waste material.
Subheading 4 of 5 in heading 2517
Subheading 251720 · $679K of $28.8M
ImportsExports
Imports
$679KYoY · free account
Exports
$504KYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $12.2M of Macadam of Slag, Dross, or Similar Industrial Waste and exported $4.5M.
Through August 2026. Source: U.S. Census Bureau.
Trade Directory
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Imports · August 2026
origin
customs district
destination
entry
rate provision · imports
100.0% enters free of duty; duty collected equals 0.00% of imports for consumption.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share |
|---|---|---|---|---|
| 2517200000 | Macadam of Slag, Dross or Similar Ind Waste | $679K | 0.00% | 0.00% |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2517200000 | Macadam of Slag, Dross or Similar Ind Waste | $504K |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.