The TWINGHY project, funded by the EU and involving nine companies and organizations across Europe, including SSAB, aims to revolutionize the steel sector by integrating hydrogen as a fuel source in reheating furnaces. By developing a digital twin to monitor furnace behavior and optimize operations, the project seeks to enhance energy efficiency and reduce environmental impact. The project also explores oxyfuel combustion using oxygen, a byproduct of hydrogen production, for increased efficiency. SSAB's participation in TWINGHY involves modeling heating processes with partners like SWERIM to achieve precision and lower energy consumption. The company is expanding its plant in Spain to conduct tests combining hydrogen and natural gas for heating slabs before rolling, emphasizing the goal of lowering CO2 emissions. By leveraging simulation techniques, SSAB aims to understand the combustion process better and ensure optimal performance. The project's ultimate objective is to facilitate the transition to sustainable energy practices in the steel sector by promoting the use of green hydrogen. Through participation in TWINGHY, SSAB expects to gain valuable experience and technical insights into the economic viability of converting to hydrogen heating. The consortium, consisting of companies and research institutions from Spain, Germany, Finland, and Sweden, collaborates to drive innovation and advance the adoption of hydrogen technology in industrial processes.