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SITCSection 2
U.S. imports of granulated slag from iron & steel manufacture (SITC 27861) totaled $13.0M in April 2026, traded with 8 countries.
Importers of Granulated Slag from Iron & Steel Manufacture paid $3.0M in duties in April 2026 — an effective duty rate of 30% on $10.1M in dutiable value, based on actual customs collections rather than the published tariff schedule. Granulated Slag from Iron & Steel Manufacture imports of $13.0M in April 2026 ran 60% above the year-to-date monthly average of $8.1M.
Last updated: April 2026 dataRapidly quenched with water during blast-furnace iron production, granulated blast-furnace slag (GBFS) develops latent hydraulic properties that make it a valued supplementary cementitious material (SCM) in concrete and blended cements. Ground granulated blast-furnace slag (GGBFS) — the milled derivative — improves concrete durability, reduces permeability, and lowers the carbon footprint of cement production, driving steady demand from infrastructure and construction sectors. Trade in this material is closely linked to regional steel-production capacity and cement-industry sustainability targets.
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Granulation refers specifically to the rapid water-quenching of molten blast-furnace slag, which produces a glassy, sand-like granule with latent cementitious properties. Slowly cooled or air-cooled slags crystallize differently and lack these hydraulic properties; they fall under a separate heading for non-granulated slag.
Granulated slag has a relatively low value-to-weight ratio, so freight costs heavily influence landed price. Most trade occurs regionally, and importers typically source from nearby steel-producing countries to keep logistics economical. Moisture content and particle size consistency also degrade with extended storage, reinforcing the preference for shorter supply chains.
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Monthly import values over time