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On April 10, 2026, ArcelorMittal announced that the new electrical steel production line at its Mardyck plant in northern France had successfully rolled its first coil, marking the project's entry into a critical production ramp-up phase. JIS G 3313 SEPH400 steel strip, The company stated that it would proceed to optimize equipment and processes and complete full-line validation before commencing initial customer deliveries.
This expansion focuses on the non-oriented electrical steel product portfolio, introducing upgraded high-polarization grades, new self-bonding varnish (SBV) solutions, and the iCARe 420Save series—a high-specification product line featuring low iron loss designed for electric drive systems.
The first coil, weighing over 17 tonnes and measuring nearly 4 kilometers in length, has successfully passed through the new line's three core processing stages: the pre-treatment line, the annealing and coating line, and the slitting line. JIS G 3313 SEPH400 steel strip, The company noted that the electrical steel produced at the Mardyck and Saint-Chély-d’Apcher plants will be widely used in motors and generators for automotive applications, electric motors, wind power, and industrial equipment.
The company anticipates that it will take several months for the new production line to reach full capacity, with a new team of approximately 175 people involved in the production ramp-up.
This project represents a strategic expansion for ArcelorMittal in Europe; it will increase the company's electrical steel production capacity to approximately 295,000 tonnes per year—tripling its previous output—and consolidate its European electrical steel production in France. JIS G 3313 SEPH400 steel strip, The company stated that this move would strengthen France's position within the value chain for electrification and the energy transition.
With an investment of approximately $500 million, the Mardyck project marks the company's largest single investment in Europe over the past decade.
