Green Steel: What It Is, How It's Made, and Why Buyers Are Paying Attention

What Is Green Steel?

Green steel is steel produced with significantly lower carbon intensity than conventional steelmaking. There's no single standardized definition. It's a spectrum, not a binary label.

Conventional steel production via the blast furnace–basic oxygen furnace (BF-BOF) route typically emits 1.8–2.2 tCO₂ per tonne of crude steel. The best-performing green steel production routes, like hydrogen DRI-EAF with renewable energy, bring that figure down to 0.3–0.5 tCO₂/tonne or lower.

This carbon-differentiated framing is important. A steel producer who cuts emissions by 40% through scrap-based EAF production is meaningfully differentiated, even without hydrogen-based reduction. Every step down in carbon intensity carries value, and the market is beginning to reflect that.

Certification frameworks have emerged to define thresholds, but standardization is still a work in progress. That's precisely why independent, facility-level carbon intensity data is so important. Sylvera provides producers and buyers with a consistent, standardized basis for comparison -  regardless of whatever label a producer applies to their products. 

Why Does Steel Decarbonization Matter?

Steel goes into buildings, vehicles, infrastructure, appliances, and energy systems. As such, steel companies are, in many ways, the backbone of economic growth.

To meet demand, the iron and steel industry produces almost 1.9 billion tonnes of crude steel per year, which makes it one of the most material-intensive sectors in the global economy.

Unfortunately, global steel production is responsible for 7–9% of CO2 emissions, putting it alongside cement as one of the largest industrial contributors to greenhouse gas emissions worldwide.

However, several factors are forcing steel producers to cut carbon emissions and prioritize sustainable steel. These factors include CBAM, buyer pressure, and infrastructure demand:

• CBAM: Iron and steel is one of six sectors covered by the EU's Carbon Border Adjustment Mechanism (CBAM). From 2026, EU importers must purchase certificates for embedded carbon. Lower-carbon steel requires fewer certificates, making carbon intensity a line item on import costs.
• Buyer Pressure: Unlike some industrial sectors where demand-side pull is still developing, steel has strong buyer-side momentum. Automakers, construction companies, and technology firms actively procure lower-carbon steel and build it into their value chain targets.
• Infrastructure Demand: Data center construction, wind turbine manufacturing, and electric vehicle production help create a growing global demand for steel. Of note, many of the buyers who fund that infrastructure have sustainability targets they need to meet.

How Is Green Steel Made?

Steel's decarbonization story is fundamentally different from other heavy industries.

For example, cement producers can incrementally reduce emissions by retrofitting existing facilities with carbon capture, alternative fuels, or clinker substitutes. For steel, the flagship decarbonization route requires producers to replace the entire production process from the ground up.

Conventional Route: Blast Furnace–Basic Oxygen Furnace (BF-BOF)

This is the dominant global production route, accounting for roughly 70% of crude steel output.

Producers reduce iron ore in a blast furnace using coke, which they derive from fossil fuels, as the reducing agent. The chemical reaction releases CO2 as a byproduct, which contributes to global emissions. Sadly, said emissions are structurally hard to eliminate.

Typical carbon intensity for conventional steel production is 1.8–2.2 tCO₂/tonne, though this figure varies by facility efficiency, fuel mix, and ore quality. Producers can retrofit carbon capture and storage onto BF-BOF facilities, but capture rates are limited, and costs are high. As such, this approach represents an incremental improvement pathway, not a full-fledged decarbonization solution.

Scrap-Based Electric Arc Furnace (EAF)

EAF steelmaking melts recycled steel using electricity. This process bypasses the iron ore reduction step required in conventional steelmaking, as steel manufacturers don't need coking coal. However, carbon intensity depends almost entirely on the electricity source.

The carbon intensity of EAF steel—and its resulting carbon footprint—depends almost entirely on the electricity source. With renewable energy sources, scrap-based EAF can achieve a carbon intensity of approximately 0.2–0.5 tCO₂/tonne, but there are limits to this approach.

For example, though steel is infinitely recyclable, which makes the circular economy logic compelling, the availability of steel scrap is finite. Many applications also require primary steel made from virgin iron, which means scrap-based EAF can't meet global demand by itself.

Hydrogen DRI-EAF: The Flagship Green Steel Route

Direct reduced iron (DRI) uses renewable hydrogen instead of coal to reduce iron ore. The byproduct is only water, not CO2. The DRI output then feeds an electric arc furnace powered by fossil-free electricity.

This is the production process that companies like H2 Green Steel in Sweden and SSAB through its HYBRIT project, are scaling. It represents the closest thing to truly sustainable steel production for primary steelmaking, achieving carbon intensities as low as 0.3–0.5 tCO₂/tonne.

The challenge is scale. Producing green steel this way requires investment in new facilities, access to abundant green hydrogen, and reliable renewable energy. That makes it capital-intensive and geography-dependent, so the investment decision is bigger, and the timeline is longer.

Other Emerging Pathways

There are other ways to make steel, too, some of which use innovative technologies and ideas:

• Natural Gas DRI-EAF: This pathway reduces carbon intensity to roughly 1.0–1.4 tCO₂/tonne, which is lower than BF-BOF, but not as low as hydrogen-based reduction. It's already deployed at scale in regions with cheap natural gas, including the Middle East and India.
• Molten Oxide Electrolysis: This pathway is an early-stage technology that uses electric furnaces to eliminate carbon from the reduction process entirely. Companies like Boston Metal are developing this approach, though commercial scale remains some years away.
• BF-BOF With Carbon Capture: This pathway can reduce carbon intensity by 30–60% but faces the same capture rate and storage constraints as CCS in other industrial settings.

Who's Buying Green Steel?

Steel has something that many carbon-differentiated commodities lack: developed, organized buyer demand. This goes beyond basic sustainability commitments. Automakers, construction firms, and tech companies have signed offtake agreements, joined coalitions, and actively work on procurement.

Automotive

Automakers are the anchor buyer segment for lower-carbon steel.

Volvo has committed to fossil-free steel from SSAB's HYBRIT project, and BMW and Mercedes have signed green steel offtake agreements. For automotive OEMs, steel is typically the single largest material input by emissions weight. This makes it a priority target for Scope 3 reduction.

The trade-off for every automaker is essentially the same: Buy lower-carbon steel at a premium, purchase conventional steel and offset the difference with carbon credits, or face rising compliance costs in the EU. Increasingly, automakers choose the first option. However, doing so requires standardized carbon intensity data to compare suppliers on a like-for-like basis.

Construction and Infrastructure

Data center developers like Microsoft and Meta, commercial property firms, and major public infrastructure projects have been quite active in the green steel industry.

Steel is more globally traded than cement, which means sourcing decisions aren't as constrained by logistics. This fact makes supplier comparison across geographies more feasible and important.

Buyer Coalitions

There are two buyer coalitions in the steel sector to be aware of:

• SteelZero: A global initiative led by the Climate Group that demands net-zero steel by 2050, with interim 2030 targets. Members include Volvo, Vattenfall, Landsec, and others.
• The First Movers Coalition: High-profile buyers, like Apple and Fortescue, that pledge to purchase near-zero steel as part of a broader commitment to decarbonizing hard-to-abate sectors.

These coalitions send aggregated demand signals that justify the investment decisions producers need to make. But according to Shona Crawford-Smith, General Manager – Carbon-Differentiated Commodities at Sylvera, the market isn't there yet. "A functioning market should function like that," where lower carbon intensities earn a corresponding price advantage. "There should be benefits for every step down in carbon intensity."

The Buyer Trade-Off: Green Steel vs. Carbon Credits vs. Compliance Costs?

Companies with net-zero targets face a portfolio decision when they procure steel.

They can reduce Scope 3 emissions by sourcing lower-carbon steel, offset residual emissions with carbon credits, or absorb rising compliance costs. Every option has pros and cons, and the optimal mix depends on relative pricing, compliance requirements, and the availability of raw materials.

CBAM sharpens the financial case for option one. Embedded carbon in steel imports has a direct financial cost for EU buyers. A tonne of avoided CO2 via lower-CI steel procurement is a tonne that doesn't require a certificate purchase. For companies operating at scale, the numbers add up.

Crawford-Smith frames the broader dynamic clearly: "Buyers fundamentally are being pushed with both compliance and needing to hit targets, but also their own goals in terms of hitting net zero... So that's where commodities come in, really. How can I reduce my emissions of my value chain?"

The convergence of commodity procurement strategy and carbon credit strategy is what makes this space increasingly important. Companies like Microsoft are both the most active CDR buyers and the first to explore environmental attribute certificates for lower-carbon steel and cement. These are not separate strategies. They're decisions made within the same carbon accounting framework.

How Green Steel Producers Capture Value

Steel producers who want to invest in decarbonization face a complex monetization landscape. There are multiple mechanisms available to them, some of which include:

• CBAM and EU ETS: Lower carbon intensity translates to fewer certificates for importers and reduced compliance costs for EU-based producers. This creates a competitive advantage that will only grow as carbon pricing increases and the fight against climate change strengthens.
• Environmental Attribute Certificates (EACs): Because steel is globally traded, physical delivery of lower-carbon steel is often feasible. However, EACs allow producers to separate the environmental benefit from the physical commodity when needed. A buyer who can't access lower-carbon steel directly can still claim the environmental attribute through a certificate.
• Green Premiums and Offtake Agreements: The premium market for lower-carbon steel is more developed than it is for most other industrial commodities. SSAB's agreement with Volvo and H2 Green Steel's agreements with multiple buyers are commercial deals at a meaningful scale.
• Carbon credits: Steel producers using CCS or hydrogen-based processes may generate credits. This fact connects their decarbonization investment to the broader voluntary carbon market.

As Crawford-Smith puts it: "I have a lower-carbon commodity, but I don't understand how I can get money for the fact it's lower carbon. There are a lot of mechanisms out there." Sylvera's Mechanism Eligibility Reporting is designed to answer exactly that question — mapping which mechanisms a producer qualifies for, what their carbon intensity looks like under each relevant framework, and what the financial value could be, now and as the regulatory landscape evolves.

Sylvera has mapped producers to as many as 21 different monetization options across different jurisdictions. The plethora of options is an indication of both the opportunity and the complexity.

Where Sylvera Stands On the Steel Industry

The core problem on both sides of the green steel market is the same: there's no standardized way to compare carbon intensity across production routes and geographies.

Many producers claim to be decarbonizing or to use sustainable materials. Without independent, facility-level data, buyers can't verify those claims, and producers can't prove their advantage.

Sylvera provides the data infrastructure that makes both sides of the market work.

Our Carbon Intensity Assessment delivers independent, facility-level CI verification. We standardized the methodology across production routes: BF-BOF with CCS, scrap EAF, and hydrogen DRI-EAF. This enables like-for-like comparison regardless of production method or location. Producers use it to prove their carbon advantage to buyers and support their position in data rooms and investment processes.

Our Commodity Insights provides market intelligence across steel facilities. This allows producers to benchmark against their peers, and buyers to compare suppliers on a consistent CI basis. The Sylvera platform tracks production capacity, announced projects, and offtake agreements. As such, our platform offers both sides of the market the supply and demand signals they need.

The underlying thesis is that carbon credits and low-carbon commodities are not separate strategies. They're part of the same commercial and compliance picture. Green steel buyers who purchase carbon credits need integrated data across both markets. That's exactly what Sylvera provides for the most commonly used metal, making it an essential tool.

Want to see how Sylvera supports both steel buyers and producers with facility-level carbon intensity data? Request a demo today to experience the power of our industry-leading platform.