A development that could shape the steel industry: While many manufacturers are still debating the switch to renewable energy, the Austrian steel group Voestalpine has already taken the step toward green electricity at its Mürztal location. The site, which specializes in high-quality steel products, is now completely powered by electricity from renewable sources – a signal to the industry that the decarbonization of steel production is not just a future vision, but an already practiced reality.
The switch to green electricity is a central pillar of Voestalpine's sustainability strategy. For the production of structural steel and reinforcing steel, which are needed in high tonnages for infrastructure and building projects, energy demand is enormous. Conventional steel production via the blast furnace process generates significant CO₂ emissions, as coke serves as a reducing agent. The use of green electricity in electric arc furnaces (EAF) significantly reduces the CO₂ balance, provided the electricity comes from wind, water, or solar power. Planners and structural engineers who want to specify steel with low environmental impact should therefore pay attention to the source of energy in the production process, ideally documented by an EPD (Environmental Product Declaration).
The initiative at the Mürztal location shows that the transformation of the steel industry is progressing on multiple levels. In addition to switching to green electricity, the industry is increasingly investing in hydrogen technologies, which are intended to replace coal-based direct reduction in the long term – an approach discussed under the term Green Steel. While hydrogen-based processes such as the DRI process are still in the scaling phase, the use of renewable energy in existing production facilities offers an immediately effective measure for CO₂ reduction.
For architects and building material dealers, this development has immediate relevance: With the increasing importance of CBAM (Carbon Border Adjustment Mechanism) and national climate targets, the CO₂ balance of steel products is becoming a decisive purchasing criterion. Manufacturers who can already demonstrate today that their products are made with renewable energy are gaining a market advantage. The Mürztal location could thus become a reference project for the industry, particularly with regard to supply security and the cost-effectiveness of green electricity-based production processes.
However, challenges remain: The availability and pricing of green electricity vary significantly by region. Additionally, existing production facilities sometimes need to be substantially retrofitted to enable the integration of renewable energy. The industry is therefore closely watching how costs per ton of steel develop and whether decarbonization can remain economically viable without state support. Voestalpine's step at Mürztal will show whether the model is scalable and can be adapted to other locations in Europe, such as at Salzgitter or other players in the steel industry.
