The HYBRIT project in Sweden has achieved a significant milestone with the successful completion of a pilot project for storing fossil-free hydrogen gas. Collaborating companies SSAB, LKAB, and Vattenfall initiated HYBRIT in 2016 to develop fossil-free iron- and steelmaking processes using hydrogen gas and renewable electricity. The pilot project involved constructing a 100m3 hydrogen storage facility in Svartöberget near Luleå, Sweden, utilizing steel-lined rock cavern technology. The innovative storage solution aims to reduce variable operating costs associated with hydrogen production for steelmaking by up to 40%. Tests conducted on the facility have demonstrated its ability to support large-scale hydrogen usage, with no leaks detected from the steel-lined rock cavity. The successful results from the pilot project have prompted discussions on scaling up the technology and exploring commercial hydrogen storage designs. The ongoing extension of the pilot project until 2026 will focus on further improving storage conditions to facilitate the transition to widespread commercial use. Experts involved in the project emphasize the critical role of hydrogen gas storage in decarbonizing industrial processes and leveraging renewable energy sources effectively. The achievement of efficient hydrogen storage for iron and steel production marks a significant step towards sustainable and environmentally friendly industrial practices.