Aeos

Nucor is advancing the possibilities of construction with Aeos high-strength structural steel

Jump to Design tools Resources Case Studies

Explore

Sustainable

Aeos is one of the lowest-embodied-carbon steels of its kind, made with more than 95% recycled content using our circular, electric arc furnace (EAF) steelmaking process.

COST-EFFECTIVE STRENGTH

Aeos’ high strength allows construction professionals to reduce tonnage, maximize structural efficiencies and deliver sustainable, cost-effective designs.

MANUFACTURED IN THE USA

Aeos is the only domestically produced A913 steel. Construction stakeholders can design and build with confidence knowing it will be there on time, when you need it.

WELDING BENEFITS

Nucor’s quench and self-temper process optimizes Aeos’ grain structure, resulting in reduced weld preheat requirements and optimized fabrication and erection.

HOW AEOS IS MADE

Aeos ASTM A913 wide flange is made using a specialized quench and self-temper (QST) process and Aeos ASTM A1066 plate is refined through a thermo-mechanical controlled process (TMCP). These processes optimize the steel’s metallurgical grain, resulting in higher strength, increased weldability and reduced weld preheat requirements compared to traditional grades like ASTM A992, ASTM A572 and A709-70W. While QST and TMCP are additional processes in our mill, they occur in-line with our normal rolling schedule, making Aeos products readily available.

DESIGN & Planning Tools

Design and specify your next building and bridge with confidence. Nucor’s team of specialists can run conceptual design studies based on your project requirements.

Aeos Availability A913 V. A992 Tech Specs

Aeos Specifications At A Glance

Comparison of Aeos™ ASTM A913 to ASTM A992
Measure	Aeos Grade 50	Aeos Grade 65	A992
Yield strength, ksi	50	65	50
Tensile strength, ksi	65	80	65
Max yield strength, ksi	65	No Max	65
Max yield-to-tensile ratio	0.85	No Max	0.85
Min. CVN: 40 ft.-lbf @ 70° F	Yes*	Yes*	No
Min. elongation (8” sample)	18%	15%	18%
Max carbon equivalent, %	0.38	0.43	0.47/0.45**
Weldable without preheat	Yes	Yes	No

*Supplement S30 may be requested on the purchase order for Charpy V-notch testing at the alternate core location for shapes with a flange thickness greater than 1 1/2". CVN impact tests shall be performed according to ASTM A673 to a minimum average absorbed energy for each test of 20 ft-lbf at 70°F unless noted otherwise on the purchase order.
**0.47% for section with flange thickness greater than 2" (50 mm), 0.45% for all other shapes.

AEOS RESOURCES

Many fabricators, erectors, detailers, welders, inspectors, structural engineers, and designers have already found the value in utilizing A913 steel in their projects. Discover the benefits of working with A913 in the resources below.

Download Aeos Brochure Download Welding Guidelines

Reimagine Building Design

Architects and engineers can design structures that are lighter, with spaces that are more flexible, and efficient, with Aeos.

Fabricator

Fabricators can easily handle, cut and weld with Aeos™ saving valuable time and energy while boosting productivity.

Download the Welding Guidelines

Case Studies

Want to talk about Aeos?

Our team of specialists are your proactive resource, leveraging Nucor’s unique position in the supply chain and our vast experience in construction to assist you at every stage of your project.

Construction Expertise

Our team of engineers and construction professionals are ready to find innovative solutions to your complex construction and sustainability challenges.

Industry Insight

Stay in the know with design trends, supply chains, lead times, and market analytics.

Project Support

Nucor is with you from the earliest stages of design to the project closeout.

Let's Talk