Modernizing the Grid: Building with Domestic EAF Steel

Data centers, electrified transportation, advanced manufacturing and other innovations are driving electricity demand higher, putting pressure on aging transmission and distribution systems. Modernizing the nation’s electrical grid is an immediate necessity because much of today’s infrastructure was built decades ago and is approaching or exceeding its intended lifespan.

Rebuilding with American-made electric arc furnace (EAF) steel offers a unique opportunity: a rapidly deployable, reliable and sustainable solution suited for the next generation of utility structures and grid hardening.

Modernizing the Energy Grid: Why Materials Matter

The electrical grid is a complex system comprised of power plants, high-voltage transmission lines, substations and local distribution networks that supply electricity to consumers nationwide. Since the grid is the foundation of our hyper-connected, electrified economy, utility leaders are under pressure like never before as they navigate dramatic surges in demand.

To effectively modernize the grid, utility companies must build for the long-term future of America’s energy infrastructure, not just to keep pace with today’s energy demands.

According to the U.S. Department of Energy, “70 percent of transmission lines are over 25 years old and approaching the end of their typical 50-80-year lifecycle” (2023). Unfortunately, the nation’s infrastructure was not built to meet current energy capacity needs. Many of today’s lines rely on outdated lattice structures or wooden poles, technologies that fall far short of the strength, resilience and scale now required.

Wood has been the traditional material for utility poles, but steel transmission poles are proven to have a longer lifespan, greater durability and significantly reduced maintenance needs. Plus, if properly coated by galvanization, steel poles are less susceptible to corrosion, pests, rot or other environmental damage.

Replacing and upgrading transmission infrastructure is a massive undertaking. When typical project timelines average about a decade from permitting through development, every month counts (Congress.gov, 2021). Utility organizations cannot afford delays caused by material shortages or fabrication bottlenecks.

Increasing Quality and Sustainability with American EAF Steel

Steel provides utilities with the strength and reliability needed to meet the new era of load growth while reducing long-term maintenance risk. Plus, American steel producers understand the nation’s unique needs and are investing accordingly.

Advantages of American-made steel:

• Every dollar spent supports American jobs, American industrial capacity and a more resilient national economy. It offers reliable mechanical performance, proven durability and superior resistance to weathering and fatigue, resulting in longer service life than alternative materials and fewer replacement cycles compared to other materials such as wood. Every product will meet or exceed the highest compliance standards.

U.S. EAF steelmakers are investing in advanced manufacturing processes that ensure tight metallurgical tolerances, delivering consistent mechanical properties. Domestically manufactured tapered tubular poles go through multiple quality assurance checks and are bolted cleanly in the field — not flimsy hybrid constructions that could twist or crack. Moreover, robotic welding and fabrication technologies enhance dimensional accuracy, weld quality and worker safety.

American-made EAF steel is also one of the most sustainable structural materials available.

Nucor’s EAF steelmaking process is inherently circular. Scrap metal is the primary input, and the process uses electricity to melt and refine the steel rather than relying on the emissions-intensive blast furnace-basic oxygen furnace (BF-BOF) steelmaking process. Based on worldsteel data, Nucor’s EAF process generates less than one-third of the greenhouse gases (GHGs) compared to the global average for BF-BOF steelmaking.

Backed by this approach, Nucor Towers and Structures’ transmission poles are made from steel that contains over 75% recycled content, making it an ideal material for utilities pursuing long-term decarbonization and sustainability goals.

Learn how circular steel is made: How to Make Steel with an EAF

By choosing domestic EAF steel at the outset, utilities strengthen both the grid and the supply chains that sustain it, setting the foundation for a stronger, more reliable energy future.

Improving Supply Chain Resilience for Utilities

Supply chain disruptions, such as trade disputes, tariffs and customs delays, can halt international supply chains. However, utilities can find reassurance by collaborating with U.S.-based steel manufacturers like Nucor. Domestic EAF steel is resilient against global shipping issues and is produced by teams familiar with federal permitting and energy regulations.

Considering the high cost of installation, any lapse in steel or fabrication quality can have a significant impact, leading to costly rework and field delays. Nucor’s steel mills can recycle scrap into finished steel sheet in just 2–3 hours, and our advanced steel pole production lines enable higher throughput and improved consistency to support tight timelines. EAF mills also benefit from smaller batch sizes and faster restarts, making them highly responsive to fluctuating project schedules.

• Shorter, more reliable lead times from mills located across the U.S.
• Reduced transportation risks by avoiding ports and overseas shipping.
• More predictable availability for long-horizon projects.
• Stronger traceability and documentation from U.S. mills, simplifying compliance.
• Faster response to schedule changes through direct mill and technical team support.

Choosing domestic EAF steel backed by a nationwide mill network streamlines procurement and minimizes the variables that disrupt project timelines. For teams building critical energy infrastructure, these advantages translate into fewer delays and a more resilient, future-proof supply chain.

Nucor is Invested in Powering the Future

We are actively pursuing strategic, long-term investments in domestic utility infrastructure by constructing three new steel utility pole fabrication facilities, located in Decatur, Alabama; Crawfordsville, Indiana; and Brigham City, Utah. These state-of-the-art sites will complement Nucor’s Hazelton, Pennsylvania facility and significantly expand domestic capacity for finished utility structures designed for strength, speed and scalability.

In particular, our Brigham City facility in Utah makes Nucor the first to make a significant investment in steel pole manufacturing production west of the Rocky Mountains, directly supporting the growing energy demands of Western states. By 2030, Nucor alone will add 130,000 tons of finished steel pole capacity, giving utility companies the reliable, domestic steel supply chain they urgently need to build new infrastructure.

With the continually increasing electricity demand, our infrastructure must be built to last and to lead. By choosing American-made steel, utilities can avoid international supply chain snarls, accelerate grid capacity and build for the future today.

Learn more about how Nucor is building the nation’s electrical infrastructure with sustainable steel and a reliable domestic supply chain: Nucor Towers and Structures