ArcelorMittal Europe – Flat Products

Online client newsletter | March 2022


3 / 7

Substation synergy

A world-leading shipbuilder diversifies into renewable energy using its skills and ArcelorMittal steel

Scroll down to read article

Chantiers de l’Atlantique is best known for building some of the world’s largest cruise ships. Around a decade ago, the company decided to diversify and began building substations for offshore wind farms. At first glance it might seem that ships and substations have little in common, but the reality is that both require exceptional planning, detailed knowledge, and the ability to turn tonnes of ArcelorMittal steel into vast structures which can withstand the harsh environment of the open ocean.

The latest substation to be built by Chantiers de l’Atlantique was installed in August 2021 and will service the Saint-Nazaire offshore windfarm. The windfarm is operated by EDF, France’s largest energy provider, and will progressively generate energy from the middle of 2022. This will be the fourth Chantiers de l’Atlantique substation for which ArcelorMittal has provided steel.

“In terms of project management and the integration of equipment, there are many similarities when it comes to building ships and substations,” notes Yann Penduff, Project Manager for Chantiers de l’Atlantique. “For example, we use the same modular approach to construction and many of the same technologies for both applications.”

The substations are built from both normalised and thermo-mechanical grades from ArcelorMittal Europe – Flat Products. “The steel has specific chemical and mechanical properties,” says Serge Hily, Steel Purchasing Manager for Chantiers de l’Atlantique.

ArcelorMittal delivers plates for both ships and substations every two weeks by sea from its mill in Gijon (Spain). “We can adjust the volumes as required,” explains Serge Hily.

One of the biggest challenges Chantiers de l’Atlantique faces when building substations is the tight deadlines. “There are very few vessels available to install substations at sea,” notes Yann Penduff. “We must book the vessel three years in advance, and then we have just one week to install the substation on its foundation. That requires clockwork precision from our team and our suppliers.”


One of the biggest challenges Chantiers de l’Atlantique faces when building substations is the tight deadlines. “There are very few vessels available to install substations at sea,” notes Yann Penduff. “We must book the vessel three years in advance, and then we have just one week to install the substation on its foundation. That requires clockwork precision from our team and our suppliers.”


To read the full article, please
Click here

More info on ArcelorMittal’s offer for wind towers.
Read more


More info on ArcelorMittal’s offer for shipbuilding.
Read more


More info on XCarb® green steel certificates.
Read more

















All articles