Nucor's blueprint for low-carbon steel: EAF technology, scrap control and transparent reporting

Nucor has positioned itself at the forefront of the steel industry’s transition to lower‑carbon production by combining electric arc furnace (EAF) technologies, process innovation such as compact strip production (CSP), well planned and executed scrap sourcing and separation, and a vertically integrated process model that ties material quality to supply security.

Speaking with AMS, Dean Kanelos, Market Development and Product Applications Manager – Automotive at Nucor, described how the company’s operational choices and transparency are helping automotive customers meet strict sustainability targets while delivering validated material performance.

Dean Kanelos – Market Development & Product Applications Manager, Nucor

Dean has 46 years of experience in the steel industry, having worked in production supervision, applications engineering, marketing, and market development, and hasbeen with Nucor for 24 years.

His role involves overseeing Automotive Market Development, Product Applications, Early Vendor Involvement and assisting in Product Development. He is Chairman for WorldAutoSteel and past Chairman of the Auto/Steel Partnership’s Joint Policy Council.

Kanelos noted that a strategic advantage for Nucor is that it does not use blast furnaces. All the steel Nucor makes is made with an EAF. “The bottom line is it's a lot easier to green the electric grid than it is to take carbon out of out of a blast furnace,” he explained. This structural difference offers more feasible decarbonisation pathways; electrifying and greening the grid that powers EAFs and DRI (direct reduced iron) processes are generally more straightforward than retrofitting integrated steelmaking with carbon capture or other measures to strip emissions from blast furnaces.

EAF and CSP as a low‑carbon backbone

Nucor’s EAF based production aligns with its process choices that are intended to boost efficiency and improve material properties. Kanelos highlighted the company’s use of compact strip production (CSP). He explained that this offers tangible benefits as CSP uses thinner slab casting and direct rolling, eliminating slab reheating and reducing energy consumption while producing microstructures that can be advantageous for advanced high‑strength steels.

Kanelos further explained how the CSP route delivers performance advantages relevant to automotive applications: “We tend to have better edge stretch and hole expansion properties because our advanced high-strength steels have a finer microstructure and lower carbon levels in their chemistries.” That combination of lower carbon chemistry, competitive ductility, strength and crash performance make EAF produced, CSP processed steels easier for OEMs to accept as direct replacements for traditional integrated mill products.

Transparency and third‑party verification

Automotive OEMs are increasingly demanding not just lower emissions numbers but traceable evidence and auditable inputs that can be rolled into their Scope 3 accounting. Kanelos described a landscape in which suppliers are helping OEMs meet ambitious carbon targets by providing granular, verifiable data.

Third party non-governmental organisations (NGOs) and reporting frameworks are central to that verification. Kanelos noted that this reporting transparency has become an important commercial lever for Nucor. By providing product level emissions data and documenting mitigation plans, OEMs can report credible Scope 3 reductions rather than approximate estimates, explained Kanelos.

Centralised scrap sourcing and circularity

An important part of Nucor’s low‑carbon strategy is its control over scrap sourcing and handling through a wholly owned subsidiary. Kanelos explained: “Nucor has a wholly owned subsidiary, the David J. Joseph Company (DJJ), that manages all of our scrap sourcing and delivery to our mills.” This internalised scrap management gives Nucor visibility and control over both the quantity and quality of recycled feedstocks, allowing it to plan supply and maintain the consistency required for high‑performance automotive grades.

Beyond volume stability, the company segments scrap streams and purposefully blends them to reduce variability. “We separate our scrap based on the source, for example a stamping plant. We then have designated scrap piles based on their residual content,” Kanelos explained. By segregating industrial scrap, shredded scrap, obsolete structural scrap and other categories, Nucor can predict and produce the desired residual chemistry of the charge and tune refining and alloying steps accordingly.

Addressing residuals – copper in focus

One of the most important technical issues in high recycled steel is control of residual elements that can accumulate as recycled content rises. Kanelos identified copper as “the most critical of the elements that we find can be a concern,” because the copper content in recycled steel gradually increases and can adversely affect the steel’s properties, especially for ductile, forming‑critical steels. Nucor has taken an active approach to removing or reducing such elements prior to melting.

Technologies and practices deployed include mechanical separation, automated and manual sorting where appropriate, and targeted investments such as ballistic separators. Complementary solutions – robotic sorting and other nonferrous separation techniques –further reduce the need for expensive downstream remediation. Kanelos noted that the net effect is cleaner input streams, more predictable melts, and fewer compromises between recycled content and material performance.

Blending discipline, metallurgical control and validation

Blending discipline at the charge stage is a central mechanism for translating varied scrap inputs into consistent steel chemistry. Kanelos described how the designated piles are blended to yield predictable residual levels. Predictability at the melt allows Nucor’s metallurgists to plan the refining and alloying steps, and to meet the strict performance requirements demanded by OEMs.

Qualification is not merely about chemistry; it is evidence‑based testing across the full range of OEM requirements. “In order to get those qualifications, you have to pass all the tests,” said Kanelos, referencing fatigue, corrosion, forming, and crash performance testing. Nucor has invested in process control, testing infrastructure and long‑term OEM partnerships to demonstrate that EAF‑ and CSP‑produced steels can meet or even exceed traditional performance benchmarks. That track record has driven broader market acceptance; Kanelos noted that competitors are now replicating mills and approaches Nucor has successfully deployed because OEMs recognise the performance and sustainability benefits.

Commercial approaches to circularity

Nucor is not only changing its internal processes; it is building circularity into commercial processes and relationships. Scrap buyback programs with OEMs are a practical example. “We have a scrap buyback program with several of our OEM customers so that we get their scrap and it goes right back to our mills to be recycled into new steel,” Kanelos explained. For Nucor these arrangements secure a predictable, traceable feedstock while creating value for OEMs who return end-of-life or manufacturing scrap into the steel supply chain. The outcome is reduced dependence on virgin raw materials and a consistent supply of low residual scrap.

Vertical integration delivering a reliability advantage

Vertical integration can be an important commercial advantage in some industrial sectors. Nucor’s downstream coating lines, fabrication units and internal customers give the manufacturer flexibility to dedicate capacity and to match production to demand with lower lead‑time risk. Kanelos highlighted that this capability delivers practical advantages beyond sustainability narratives. For customers in construction and automotive sectors, this integration translates into supply security, more consistent product deliveries and the ability to make commitments on timing and product breadth that competitors reliant on open‑market sourcing may struggle to meet.

Investments and future facilities

Nucor says it is investing in both new mills and upgrades designed to expand product capability while lowering carbon intensity. Kanelos noted that the company’s new, state‑of‑the‑art sheet steel mill in West Virginia will increase their product range and produce “the lowest carbon footprint product.” Nucor plans to commission the West Virginia mill by the end of 2026, “with the intent to be able to supply all the steel grades and types of products that our automotive customers demand,” said Kanelos. Upgrades to existing assets – such as a new cold mill in Arkansas – are also targeted at producing advanced high‑strength steels with lower embodied carbon.

Kanelos also pointed to technological decarbonisation projects beyond scrap and EAF management, including carbon capture at DRI production facilities. This demonstrates Nucor’s parallel strategy tracks: cleaner electricity for EAFs, cleaner feedstocks such as DRI where needed, and emissions mitigation where direct decarbonisation is more complex.

Delivering reliable, validated circular steel

Nucor’s approach ties process innovation to commercial models and transparency practices so that circular steel becomes a deliverable product rather than an aspiration. The steel manufacturer translates high recycled content into validated, low-carbon steel that OEMs can credibly count in their Scope 3 reductions through a combination of EAF and CSP process advantages, segmented scrap sourcing, advanced separation technologies, blending and metallurgical control, and OEM-oriented validation and contractual mechanisms.