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Optima Specialty Steel, Inc., headquartered in Miami, FL, is one of North Americaâs leading independent manufacturers of specialty steel products.
Profile. ArcelorMittal S.A. produces steel. The Company manufactures cold rolled, electrogalvanized and coated steels, slabs, special quality bars, and wire rods. Arcelor Mittal has steel making operations in Europe, the Americas, Asia, and Africa.19, Avenue de la Liberte.rcelorMittal S.A. produces steel. The Company manufactures cold rolled, electrogalvanized and coated steels, slabs, special quality bars, and wire rods. Arcelor Mittal has steel making operations in Europe, the Americas, Asia, and Africa. 19, Avenue de la Liberte.