ACS Steel Group (ACS/SteelHy)

The alpine family boiler ACS (Atelier de Chaudronnerie de SASSENAGE) has existed for 20 years and is specialized in the manufacture of energy-related parts such as hydroelectricity (door panels, turbines, grids, funnel …), hydrogen, OFF SHORE, nuclear … but also R&D.
Our historical know-how in boilermaking and piping allows us to work in complete confidence with major clients such as AIR LIQUIDE, MCPHY, GE HYDRO, EDF, CNR, AREVA, ARKEMA, CATERPILAR.
ACS is an industrial boilermaker which must reinvent itself and wishes to leave its classic industrial scheme by integrating the French hydrogen sector of excellence in order to participate in the decarbonization of our planet.
For this we wanted to create and integrate into our group a new entity which will be dedicated to this activity of the future: SteelHy.
We want to become the French benchmark in the containerization of hydrogen stations with our standardized SteelHyBOXes and meeting all of your specifications: from the most complete and demanding to the simplest.
While always keeping in mind compliance with safety regulations and standards.


4 chemin du Drac ZI de l'Argentière


ETI / PME / TPE, PME-PMI (>11 et <50 salariés)


Expertise hub

  • Chaleur - froid

  • Gaz renouvelables / biomasse / bois énergie…

  • Hydroélectricité

  • Hydrogène

  • Infrastructures / Réseaux / Stations

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