Steel mill becomes first to switch on mostly green power

Steel Dynamics turns on renewable electricity across its US production network

Steel Dynamics has become one of the first American steelmakers to power a significant portion of its operations with renewable electricity. In October 2024, the Indiana-based company announced it had used 690 million kilowatt-hours of green power across its steel mills in 2023. That figure represents 10% of the company’s total steel mill electricity demand and fulfils its 2025 renewable energy target ahead of schedule.

The company also secured what it describes as the largest renewable product purchase agreement in the North American steel sector. This deal, signed in 2023, covers approximately 15% of Steel Dynamics’ steel mill electricity usage. The associated wind facility began commercial operation in the first quarter of 2024.

For UK businesses tracking industrial decarbonisation, this development demonstrates how heavy manufacturers are beginning to reduce emissions through renewable power procurement. While the shift is happening in the United States, the approach offers a template that could reshape supply chains and material specifications in UK construction, automotive, and infrastructure projects.

Steel’s carbon problem remains one of industry’s biggest challenges

Steel production accounts for roughly 7% to 8% of global greenhouse gas emissions. The World Steel Association reports that in 2024, every tonne of steel produced generated an average of 2.18 tonnes of CO₂ equivalent across all emission scopes. Total sector emissions reached approximately 4.1 billion tonnes of CO₂ equivalent annually.

These figures explain why even partial transitions to low-carbon electricity matter. Unlike some industrial processes, steelmaking cannot simply swap out fossil fuels for cleaner alternatives. Decarbonisation typically requires a combination of approaches including electrification, renewable power, scrap-based electric arc furnaces, hydrogen-based direct reduction, and sometimes carbon capture technology.

The financial implications are substantial. Analysis suggests that electricity can account for 40% to 50% of production costs in some green steel configurations. Consequently, securing renewable power at competitive prices becomes a commercial imperative as well as an environmental one.

How Steel Dynamics structured its renewable electricity transition

Steel Dynamics joined the US Environmental Protection Agency’s Green Power Partnership in October 2024. The EPA recognised the company among its largest green power users based on verified consumption data from the previous year.

The company’s renewable electricity strategy centres on long-term purchase agreements rather than on-site generation. Its 2023 agreement represents the largest renewable product purchase in North American steel manufacturing. This contractual approach allows the company to access renewable electricity without building or operating its own wind or solar facilities.

The wind project linked to this agreement became operational in early 2024. Steel Dynamics states this single project moves it substantially toward its 2030 goal of sourcing 30% of its electricity from renewable sources. The company operates multiple steel mills across the United States, and the renewable power is distributed across this production network.

This phased approach reflects broader industry realities. Full decarbonisation of steelmaking requires technological changes that remain expensive or commercially unproven at scale. Meanwhile, renewable electricity procurement offers immediate Scope 2 emissions reductions using established commercial mechanisms.

Implications for UK manufacturers and supply chains

British businesses should pay attention to this development for several reasons. First, it signals how industrial buyers are responding to pressure from downstream customers. Automotive manufacturers, construction firms, and infrastructure developers increasingly specify lower-carbon materials in their procurement requirements.

For UK companies that import steel or steel products from North America, this shift could affect product carbon footprints and regulatory reporting. From 2027, the UK government will require businesses to report Scope 3 emissions in certain circumstances. Steel purchased from suppliers using renewable electricity will carry lower embedded emissions than conventional alternatives.

Second, the commercial structure matters as much as the environmental outcome. Steel Dynamics used power purchase agreements to secure renewable electricity without capital investment in generation assets. This model is available to UK manufacturers through similar contractual arrangements, either directly with generators or through energy suppliers offering renewable tariffs backed by certificates of origin.

Third, the competitive dynamic is shifting. As major producers adopt lower-carbon processes, businesses that continue using carbon-intensive steel may find themselves at a disadvantage in tenders and supply chain assessments. Public sector procurement in the UK already incorporates carbon considerations through policies such as PPN 06/21, which requires suppliers to publish carbon reduction plans.

Questions about renewable electricity and industrial emissions

Does renewable electricity eliminate steel’s carbon footprint entirely? No. Steel production generates the majority of its emissions from the chemical process itself, not from electricity consumption. Renewable power reduces Scope 2 emissions but does not address Scope 1 emissions from blast furnaces or other process-related sources.

Can UK steelmakers adopt similar approaches? Yes. Several mechanisms exist for procuring renewable electricity in the UK, including corporate power purchase agreements, renewable energy guarantees of origin, and direct offtake agreements with generators. The specifics depend on a business’s size, electricity demand, and risk appetite.

What happens to steel pricing? Renewable electricity procurement can affect production costs, particularly where wholesale power prices fluctuate significantly. However, long-term agreements often provide price certainty that helps manage volatility. The impact on end-product pricing depends on competitive dynamics, contract terms, and customer willingness to pay for lower-carbon materials.

Facts about Steel Dynamics’ renewable power program

• Steel Dynamics used 690 million kilowatt-hours of green power across its steel mills in 2023, covering 10% of total electricity demand.
• The company signed the largest renewable product purchase agreement in North American steel manufacturing in 2023, equivalent to approximately 15% of its steel mill electricity usage.
• The wind facility associated with this agreement began commercial operation in the first quarter of 2024.
• Steel Dynamics aims to source 30% of its electricity from renewable sources by 2030.
• The US Environmental Protection Agency recognised Steel Dynamics among its largest green power users in October 2024.
• Global steel production generates approximately 2.18 tonnes of CO₂ equivalent per tonne of steel produced, according to the World Steel Association.
• The steel sector accounts for roughly 7% to 8% of global anthropogenic greenhouse gas emissions.

What UK businesses should consider about industrial decarbonisation

The Steel Dynamics announcement demonstrates that large-scale renewable electricity procurement is becoming a standard industrial practice rather than an experimental initiative. For UK businesses, this trend creates both opportunities and requirements.

Manufacturers that import steel or use it in their products should review their supply chain emissions data. If your business reports carbon footprints for products or participates in public sector tenders, the embedded emissions in purchased steel will affect your figures. Switching to suppliers that use renewable electricity can reduce your Scope 3 emissions without changing your production processes.

Companies that manufacture in the UK should evaluate their own electricity procurement strategies. Carbon reporting requirements under PPN 06/21 and other compliance frameworks mean that renewable electricity can deliver both environmental and commercial benefits. The cost differential between renewable and conventional power has narrowed considerably, and in some cases renewable options now offer price advantages.

For businesses facing customer pressure on carbon credentials, renewable electricity provides a relatively straightforward intervention. It does not require changes to production equipment, process redesign, or extensive capital investment. However, it does require careful contract negotiation and an understanding of how different procurement mechanisms affect carbon accounting and reporting.

Business owners should also consider how competitors and peers are responding to similar pressures. As major industrial players adopt renewable power, the baseline expectation in supply chains will shift. What appears voluntary today may become a minimum requirement in tender specifications within a few years.

Finally, this development highlights the interconnected nature of industrial decarbonisation. Steel production in the United States affects carbon footprints of products sold in the UK. Supply chain emissions cross borders, and so do the solutions. UK businesses need to track these developments internationally, not only domestically.

Training and support for carbon reporting compliance

Understanding how renewable electricity procurement affects carbon accounting requires specific technical knowledge. The distinctions between market-based and location-based emissions factors, the role of certificates of origin, and the treatment of power purchase agreements in Scope 2 reporting can be complex.

SBS Academy offers training on carbon measurement and reporting that covers these topics in practical detail. For businesses preparing to report Scope 3 emissions, understanding how to account for purchased goods and services including steel is essential.

Supply chain emissions often represent the largest portion of a business’s carbon footprint, particularly for companies that manufacture products or work in construction. Getting these calculations right matters for compliance, for tender responses, and for identifying where reductions are actually achievable.

Where to find authoritative guidance on industrial emissions

The Department for Energy Security and Net Zero publishes guidance on industrial decarbonisation policy in the UK, including support schemes and regulatory requirements for energy-intensive industries.

For specific information on greenhouse gas reporting protocols and how to account for purchased electricity, the UK government’s conversion factors for company reporting provide the official methodology and emission factors used in carbon footprint calculations.

Businesses interested in procuring renewable electricity can find guidance through Ofgem’s information on Renewable Energy Guarantees of Origin, which explains how renewable electricity is certified and tracked in the UK market.

The Greenhouse Gas Protocol provides the international standards for corporate carbon accounting, including detailed guidance on Scope 2 emissions from purchased electricity and Scope 3 emissions from purchased goods and services.