California Steel Industries, Inc. (CSI)

MiningCalifornia, United States201-500 Employees

California Steel Industries, Inc. (CSI) is a mid-sized steel producer based in Fontana, California, focusing on flat rolled steel. It manufactures a broad range of flat rolled products, including hot rolled, pickled and oiled, galvanized, cold rolled sheet, and electric resistance welded pipe, with the capacity to exceed two million tons annually across five product lines. Founded in 1984, CSI has continuously updated its facilities to maintain operations, productivity, and a commitment to safe and environmentally compliant manufacturing.

CSI positions itself as a leading flat rolled steel producer on the West Coast, serving customers that rely on these products for manufacturing and construction needs. The company emphasizes producing quality steel in a safe work environment with high productivity while meeting environmental regulations. In 2026, CSI expanded its asset base with the purchase of two AGT400s, aimed at improving production capability, operator safety, and efficiency.

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