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Affordable Grid Solutions with Advanced Steel-Core Conductors

As utilities work to meet rising electricity demand and modernize aging infrastructure, industry collaboration is essential. The Advanced Grid Steel Alliance unites utilities, manufacturers, and key stakeholders to advance proven conductor technologies that enhance grid performance, increase resilience, and help deliver reliable, cost-effective power.

Steel-core conductor technology has evolved significantly over the years. Today's advanced solutions enable greater transmission capacity, improve system performance, make better use of existing rights-of-way, and reinforce a strong domestic manufacturing supply chain.

LEARN WHY ADVANCED CONDUCTOR POLICY SHOULD REMAIN MATERIAL NEUTRAL

The Evolution of Advanced Steel-Core Conductors

Steel has long been the foundation of overhead transmission conductors. Today, advanced metallurgy, precision manufacturing, and innovative wire designs have transformed steel cores into high-performance solutions that do much more than provide mechanical support.

With significantly higher tensile strength and no added weight, modern steel cores allow engineers to increase the amount of aluminum within the same conductor footprint. The result is greater power-carrying capacity while maintaining existing line tensions, clearances, and structural requirements.

These advancements help utilities transmit more electricity with lower line losses, maximize the value of existing transmission infrastructure, and reduce material usage without sacrificing performance. By combining proven reliability with continuous innovation, advanced steel-core technology is helping build a stronger, more efficient grid for the future.

Development of Steel Core Strength Ratings
1907 - 2025
Tensile Strength (MPA) Tensile Strength (kpsi) 1000 1200 1400 1600 1800 2000 2200 0 50 100 150 200 250 300 IPS 160 ksi (1100 MPa) GA2 205 ksi (1410 MPa) GA3 230 ksi (1590 MPa) GA5/MA5 275 ksi 1900 MPa MA7 Mega 298 ksi (2052 MPa) Giga/MAB 311 ksi (2147 MPa) 1900 1920 1940 1960 1980 2000 2020 2040 Year

Supporting Material-Neutral Policies for Grid Reliability and Growth

Grid policy should establish the performance outcomes the electric system needs to achieve, not dictate which materials or technologies utilities must use to get there. Narrow definitions unintentionally exclude proven steel-cores.

A material-neutral approach gives utilities, engineers, and transmission planners the freedom to evaluate available technologies based on the specific requirements of each project. Factors such as operating conditions, system design, project timelines, constructability, lifecycle considerations, and total cost can then guide the selection process.

The Advanced Grid Steel Core Alliance supports policies that preserve this flexibility. Rather than favoring one conductor material or design, regulations and funding programs should encourage competition among technologies that meet defined performance standards.

Material-neutral policies can help:

  • Encourage innovation and continued investment across conductor technologies
  • Give utilities greater flexibility when planning transmission projects
  • Promote competition based on performance, cost, and project requirements
  • Support practical solutions for both near-term needs and long-term grid growth

A technology-neutral framework allows the industry to choose the right solution for the right application, while keeping reliability, affordability, and continued grid development at the center of the decision.

Why Steel-Core Conductors Matter

Affordability: lower cost per amp and lower total owning cost

Reliablility: dependable performance under higher loads

Resilience: wildfire-risk mitigation and stable sag performance

Domestic supply chain: American steel, jobs, and manufacturing capacity

Deployment speed: familiar installation and existing infrastructure compatibility

By the Numbers

Advanced steel core conductors are designed to help utilities deliver more power, manage costs, and perform reliably under demanding operating conditions.

Power &
Efficiency
Reliability &
Resistance
Operational
Advantage
Sustainability &
Longevity
17.2% More Capacity vs. ACCC More power within the same right-of-way.1
27.5 Million PSI Elastic Modulus Superior resistance to sag, wind, and ice loading.3,5
95% Industry Adoption Rate Supported by a mature, proven supply chain. 1
Lower Carbon Footprint Approximately 1 kg CO₂ compared to approximately 20 kg CO₂ for carbon fiber.4
25% Lower Resistance Improves efficiency and delivers more generated power.2
600°C Wildfire Resistance Enhanced survivability in extreme conditions. 2
Compatible with Existing Utility Workforce No specialized tools or extensive retraining required.1
52+ Years of Proven Service Decades of field-proven performance.1
$1.05 Cost per Amp Reduces overall system cost.1
Multi-Strand Core Design Eliminates single-point-of-failure concerns.1
250°C Operating Temperature Reliable performance during peak loading events.1
Robust Steel Core Construction Optimized for strength, resiliency, and long-term transmission performance.1

Steel Supports American Jobs and Economic Output

Steel production in the United States supports 87,266 jobs and contributes $149.9 billion in economic output, according to the source note listed in AGSA One Pager Final. 

Stat Cards: 

  • 87,266 jobs supported 

  • $149.9B in economic output 

  • Made in America grid infrastructure support 

Source: Steel Manufacturers Association, based on data from the Bureau of Labor Statistics and U.S. Census Bureau; 2024 data.

Join the Effort

The future of grid modernization depends on policies and technologies that promote innovation, competition, and performance-based decision-making. 

Join the Advanced Grid Steel Core Alliance in supporting material-neutral, performance-based policies that empower utilities to choose the best solutions for their unique needs.

Start the Conversation

Advance Grid Steel Alliance

American Iron and Steel Institute Rocky Mountain Steel Mills Steel Manufacturers Association AWPA Optimus Steel Bekaert

References

  1. 23-50856_R12a_-AdvConductorsScanProjectReportCompressed.pdf
  2. Connecting Renewable Energy with Giga-Strength Steel White Paper
  3. ACCC Engineering Manual
  4. Environmental Impact of Carbon Fibers Fabricated by an Innovative Manufacturing Process on Life Cycle Assessment
  5. Southwire OCM