Swedish steel corporation SSAB is positioning itself as a pioneer of fundamental transformation in the steel industry. With hydrogen-based steel, the company wants to almost eliminate CO₂ emissions from production while opening up new business fields. While the vision appears technically achievable, key questions remain about economic scalability, investment costs, and market penetration – particularly for customers in the construction industry who need structural steel and reinforcing steel in large quantities.
Technological Approach: Direct Reduction with Hydrogen Instead of Blast Furnace
Conventional steel production is based on the reduction of iron ore in the blast furnace with coke, a carbon-containing fuel. Depending on the technology and energy mix, this produces between 1.8 and 2.3 tons of CO₂ per ton of raw steel. SSAB is pursuing a radically different approach: direct reduction of iron ore with hydrogen instead of carbon. The end product of this reaction is sponge iron and water vapor – theoretically without relevant CO₂ emissions, provided the hydrogen used is generated from renewable energy sources.
The technology itself is not new. Direct reduction plants exist worldwide, but predominantly operate with natural gas. The key difference lies in the complete replacement of fossil fuels with green hydrogen. SSAB has already demonstrated in pilot plants that the process works technically. The challenge now lies in industrial scaling and the availability of sufficient quantities of green hydrogen at competitive prices.
Ramp-up Plan: Timeline and Production Capacities
SSAB has announced that it wants to produce commercial quantities of hydrogen-based steel by the end of the 2020s. Exact capacities and timelines vary depending on the availability of infrastructure, subsidies, and hydrogen supply. Preparations for the conversion of existing facilities are underway at the Swedish Oxelösund plant and in Finland. In parallel, SSAB is developing supply contracts with customers from the automotive, machinery, and construction industries to create planning certainty.
The construction industry is a central customer in this context: reinforced concrete is one of the most important structural materials in building and civil engineering. The carbon footprint of buildings is increasingly regulated – for example through the EU taxonomy, national climate protection laws, and sustainability certifications. Steel with significantly reduced CO₂ footprint could therefore become a differentiating feature for both steel producers and construction companies and developers.
Dependence on Hydrogen Infrastructure
The feasibility of production targets depends significantly on the availability of green hydrogen. Electrolyzers for hydrogen production are being built in Europe, but capacities are currently limited. SSAB is therefore dependent on cooperation with energy suppliers and government support. In Sweden and Finland, the company benefits from comparatively low electricity prices from hydropower and nuclear energy – a location advantage that is less pronounced in other European regions.
Furthermore, the switch requires substantial investments in production infrastructure. Blast furnaces cannot simply be retrofitted, but must be replaced by direct reduction plants and electric arc furnaces. Capital costs are correspondingly high and only amortize over the long term with stable sales markets and sufficient price premiums for green steel.
Cost Structure: Who Bears the Additional Costs for Climate-Neutral Steel?
Production costs for hydrogen-based steel are significantly higher than conventional processes. Key cost drivers are the high electricity demand of electrolysis, investments in new facilities, and the lack of economies of scale. Estimates suggest that green steel could initially be 20 to 50 percent more expensive than fossil-produced steel – depending on hydrogen price, electricity costs, and CO₂ certificate prices.
For the construction industry, this means difficult calculations. Reinforcing steel is only part of the total costs of a building, but especially in cost-intensive projects and public construction, budgets are tightly calculated. The willingness to pay additional costs for low-carbon steel therefore depends heavily on regulatory requirements, subsidy programs, and demand for sustainable buildings.
Interesting is the parallel to decarbonization of the cement industry: there too, manufacturers struggle with the balancing act between ecological goals and economic competitiveness. The decarbonization of the cement industry stalls not least because of unclear cost distribution and hesitant demand. Similar mechanisms could also apply to green steel.
Market Opportunities: Differentiation or Niche Product?
SSAB is betting on green steel establishing itself as a premium product – especially in markets with strict sustainability requirements and high willingness to pay. The automotive industry, which is already under considerable pressure to improve its CO₂ balance, is considered a pioneer customer. Climate-neutral steel could also be preferred in infrastructure projects with public involvement.
For the broad construction industry, the question remains whether green steel will go beyond a niche. As long as conventional steel remains significantly cheaper and no mandatory CO₂ ceilings for building products exist, demand will remain subdued. Political instruments could be crucial here: CO₂ limits for building materials, tax relief for climate-neutral products, or public procurement that mandates low-carbon materials.
European Competitors and Consolidation Pressure
SSAB is not the only steel producer betting on decarbonization. Other European manufacturers are also working on similar technologies – some in cooperation, some in competition. The recent merger of SSAB with specialty steel manufacturer Ovako shows that the industry is under considerable consolidation pressure. The merger is intended to create synergies and strengthen market position to be able to handle the high transformation costs.
The consolidation trend in the steel industry is similar to developments in other building materials industries: mergers and acquisitions have also increased in recent years in roof tiles, insulation materials, and wood-based products, often driven by the need to invest in new technologies and sustainability strategies.
Impact on the Construction Industry Supply Chain
Building material dealers, construction companies, and planners face several implications. First, the availability of green steel will initially be limited. Long-term supply contracts and early coordination with steel producers may be necessary to secure access to climate-neutral material. Second, calculation methods must be adjusted to make additional costs transparent and take them into account in project planning.
Third, the demand for low-carbon building materials could put pressure on the entire supply chain. As climate-neutral steel becomes available, other materials – concrete, insulation materials, glass – will increasingly be scrutinized for their CO₂ footprint. The construction industry thus faces the challenge of integrating sustainability criteria throughout the entire value chain, which requires complex coordination and new procurement strategies.
Critical Success Factors and Open Questions
Whether SSAB's strategy succeeds depends on several factors. First, hydrogen supply must be ensured at competitive prices. Second, there is a need for stable political framework conditions that create investment security and incentives for the use of climate-neutral materials. Third, SSAB must prove that green steel meets customers' requirements in terms of quality and workability – particularly in the demanding construction sector.
One open question remains the speed of scaling. Even if SSAB ramps up its production capacity as planned, the share of green steel in the overall market will initially remain small. Global steel production is over 1.9 billion tons annually. To replace relevant quantities, many producers would have to switch at the same time – which requires considerable coordination and investment.
Conclusion: Realistic Future Scenario or Ambitious Promise?
SSAB's strategy of betting on hydrogen-based steel is technologically sound and politically opportune. Decarbonization of the steel industry is inevitable if climate targets are to be met. The question is not whether green steel will come, but when and at what cost. Parallels to the cement industry show that the transition is complex and depends not only on technological innovation but also on market acceptance, support policy, and infrastructure development.
For the construction industry, this means: green steel will be available in the medium term, but initially in limited quantities and at higher prices. Planners and purchasers should monitor developments, build supplier relationships, and identify projects where the use of climate-neutral materials is economically and strategically worthwhile. The transformation of the steel industry is underway – but it will happen gradually and not overnight.
