ArcelorMittal is preparing to commission the first three production lines of its new electrical steel unit at the Mardyck site near Dunkirk by the end of 2025. Electrical steels, ultra-thin, specially treated steels with defined magnetic and mechanical properties, are essential for electric motors used across industrial and automotive applications.
The new facility will expand ArcelorMittal’s European electrical steel portfolio and complement its existing production at Saint-Chely-d’Apcher.
The Mardyck investment is part of a EUR 500 mln (USD 582 mln) program, the group’s largest European investment in the past decade. By 2027, five new lines will be operational. Phase 1 includes a preparation line, an annealing and varnishing line, and a slitting line, all now nearing start-up, while civil works for Phase 2 (annealing and pickling line and reversible rolling mill) are underway.
Managing Director Bruno Ribo said employees were closely involved in developing the new lines and expressed pride in seeing the first coils of what will eventually be 155,000 tons of annual electrical steel output. Once the full project is completed, ArcelorMittal’s European electrical steel capacity will reach 295,000 tons per year, all produced in France, strengthening the local electromobility and energy-transition ecosystem.
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