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SITCSection 6
U.S. imports of cast articles of malleable cast iron or steel, not elsewhere specified (SITC 69963) totaled $17.5M in April 2026, traded with 44 countries.
Importers of Cast Articles of Malleable Cast Iron or Steel, Not Elsewhere Specified paid $7.8M in duties in April 2026 — an effective duty rate of 50% on $15.4M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataMalleable cast iron and steel castings in this residual heading are distinguished from gray iron by their annealing treatment, which imparts ductility and impact resistance — properties that make them suitable for pipe fittings, agricultural equipment components, and load-bearing hardware where gray iron would be too brittle. Steel castings captured here include those not more specifically described as parts of machinery, vehicles, or named equipment. Section 232 tariffs on steel and iron articles are a live cost consideration for importers, and the distinction between malleable cast iron and steel castings can affect which specific tariff line applies. Buyers should obtain material certifications confirming the annealing process and alloy composition to support both classification and quality assurance.
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Malleable cast iron achieves ductility through a heat-annealing process applied to white cast iron, while ductile (nodular or spheroidal graphite) iron achieves similar properties through magnesium treatment during casting. For tariff classification, ductile iron is generally treated as a form of cast iron distinct from malleable cast iron, and importers should confirm which microstructure their supplier's material test report describes to ensure correct heading assignment.
A steel casting is redirected to a more specific heading whenever it is identifiable as a part of a named machine, vehicle, or apparatus — for example, a casting that is clearly a pump housing or a gearbox casing would follow the classification of that equipment. Only castings that cannot be assigned to a more specific product heading remain in this residual category.
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Monthly import values over time