Discover who the biggest steel supplier in the US is. Learn why Nucor leads in volume, how Cleveland-Cliffs dominates flat-rolled steel, and what trends shape the 2026 market.
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The world's biggest steel plant is ArcelorMittal's integrated Ghent-Dunkirk complex in Belgium and France, producing over 13.5 million metric tons of steel annually with advanced automation and plans for carbon neutrality by 2030.
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