Infrastrutture

ArcelorMittal Mardyck: Creation of an Electrical Steel Production Unit
by Artelia Group

ArcelorMittal France, one of the world's leading steel groups, is embarking on an ambitious project to establish a 200 kt/year electrical steel production unit at its Mardyck site in northern France. This initiative aligns with the group's commitment to support the automotive industry's transition to electric mobility, contributing to the decarbonization of transport.

Project Overview

The Mardyck Site

Located in the Dunkirk conurbation, the Mardyck site is an extension of the Grande-Synthe site, one of Europe's largest steelworks. While the Grande-Synthe site focuses on steel production and hot rolling, Mardyck specializes in cold rolling high-end multi-products, including galvanized steel for automakers and thick pickled steel.

Electrical Steel Production Unit

The new electrical steel production unit at Mardyck aims to produce steels with specific electromagnetic properties required for manufacturing electric motors. This project is a significant step in supporting the automotive industry's shift towards electric vehicles, promoting sustainability and reducing carbon emissions.

Artelia's Role

Artelia has been a long-term partner of ArcelorMittal France, collaborating on various engineering and project management assignments for over 30 years. The current project at Mardyck involves Artelia's expertise in several key areas:

Design and Integration

Artelia's teams are actively involved in designing the new electrical steel unit. This includes the creation of fluid networks and steel structures that supply and support the various components of the installation, such as furnaces, shot-blasting cells, pickling units, and rolling mills.

Equipment Integration

The project encompasses the integration of a wide range of equipment, including furnace cabins, auxiliary equipment for rolling mills, sheet and strip metal production equipment, and presses for metal extrusion and sintering. Artelia's experience ensures seamless integration and optimal functionality of these complex systems.

Construction Coordination and Supervision

Artelia is responsible for the coordination and supervision of the entire construction process. This includes managing the construction of five separate production lines: annealing and pickling, reversible rolling mill, preparation, annealing and varnishing, and inspection. Some of these lines are housed in existing buildings, requiring careful planning and execution.


The creation of an electrical steel production unit at the Mardyck site is a testament to ArcelorMittal France's commitment to innovation and sustainability. With Artelia's extensive experience and expertise, this project is set to provide the automotive industry with the essential materials needed for the production of electric motors, driving forward the decarbonization of mobility and contributing to a greener future.