U.S. imports of Granulated Slag from Iron & Steel Manufacture (SITC 27861) totaled $8.3M in August 2026, imported from 8 countries.
Importers of Granulated Slag from Iron & Steel Manufacture paid $1.2M in duties in August 2026, an average duty rate of 15.09% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 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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30 import shipments a month
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.
Basic heading 70 of 239 in section 2
Basic heading 27861 · $8.3M of $3.8B
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Imports · August 2026
origin
Japan and China together supply 87% of it. China pays 37.5% duty; South Korea 0.0%.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$8.3MYoY · free account
Exports
$478KYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $94.6M of Granulated Slag from Iron & Steel Manufacture and exported $20.7M.
Through August 2026. Source: U.S. Census Bureau.