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Soar Higher, Finish Faster

Elevate your project expectations and efficiency with Nucor Aeos – the optimized A913 that’s backed by a team of collaborative experts from Nucor Construction Solutions.

Aeos, the only American-made A913 steel

Nucor is pushing the limits of construction with Aeos (Agile, Efficient, Optimized, and Sustainable), an economical high-strength structural steel.

  1. AGILE

    Because Nucor is the sole domestic supplier of A913 steel, construction stakeholders can confidently design and build with agility knowing that Aeos will be there on time, when they need it.

  1. EFFICIENT

    Aeos’ higher strength allows construction professionals to maximize efficiencies throughout their structures with regard to material weight and cost.

  1. OPTIMIZED

    Nucor’s unique quench and self-temper process optimizes the metallurgical grain structure of Aeos steel, resulting in reduced weld preheat requirements alongside optimization of steel fabrication and erection.

  1. SUSTAINABLE

    Aeos achieves unrivaled sustainability and boasts a recycled content percentage in excess of 90% through the use of electric-arc furnaces and scrap metal as the primary feedstock.

Featured Aeos Project

Rainier Square Tower

Integrated into the existing environment, the tower uses a shear wall core system consisting of steel plates instead of traditional rebar and formwork between concrete elements. This method reduced the amount of time needed to erect the floors of the tower.

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High Strength

Aeos steel is available in yield strengths of 50ksi and 65ksi, providing a cost-effective and higher strength-to-weight ratio.

aeos-high-strength

Proven Weldability

Not only is Aeos a prequalified material under AWS D1.1-2020, but the preheat requirements for it are substantially less than that of A992.

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Sustainably Made in the USA

Aeos is the only domestically produced A913 material.

Download Aeos brochure

Aeos Specifications at a Glance

Comparison of Aeos to A992
MeasureAeos 50Aeos 65A992
Yield strength, ksi506550
Tensile strength, ksi658065
Max yield strength, ksi65No Max65
Max yield-to-tensile ratio0.85No Max0.85
Min CVN: 40 ft-lbf @ 70° F*YesYesNo
Min elongation (8” sample)18%15%18%
Max carbon equivalent, %0.380.430.47/0.45**
Weldable without preheat YesYesNo

*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.

Welding

Aeos is a prequalified material per AWS D1.1-2020, Table 5.3. Aeos 50 and 65 are classified as Category D materials per AWS D.1.1-2020 Table 5.8, which stipulates no welding preheat is required as a result of the material’s limits on maximum carbon and carbon equivalent values. Therefore, significant savings are realized in fabrication, labor and energy costs, and field welded connections.

Aeos Section Availability

Aeos Section Availability
Sections
 W12xW14xW18xW21xW24xW27xW30xW33xW36xW40xW44x
 659076101568490118135149230
 729986111619499130150167262
 791099712268102108141160183290
 8712010613276114116152170199335
 9613211914784129124169182211 
 10614513016694146132201194215 
 120159143182103161148221210235 
 136176158201104178173241231249 
Footweights (plf)
152193175223117194191263232264 
 170211192248131217211291247277 
 190233211275146235235318256278 
 210257234 162258261354262294 
 230283258 176281292387282297 
 252311283 192307326 302324 
 279342311 207336357 330327 
 306370  229368391 361362 
 336398  250   395372 
  426  279   441397 
  455  306   487431 
  500  335   529503 
  550  370       
  605          
  665          
  730          

Select a Section

All values shown in Footweights (plf)

  • 65
  • 72
  • 79
  • 87
  • 96
  • 106
  • 120
  • 136
  • 152
  • 170
  • 190
  • 210
  • 230
  • 252
  • 279
  • 306
  • 336
  • 90
  • 99
  • 109
  • 120
  • 132
  • 145
  • 159
  • 176
  • 193
  • 211
  • 233
  • 257
  • 283
  • 311
  • 342
  • 370
  • 398
  • 426
  • 455
  • 500
  • 550
  • 605
  • 665
  • 730
  • 76
  • 86
  • 97
  • 106
  • 119
  • 130
  • 143
  • 158
  • 175
  • 192
  • 211
  • 234
  • 258
  • 283
  • 311
  • 101
  • 111
  • 122
  • 132
  • 147
  • 166
  • 182
  • 201
  • 223
  • 248
  • 275
  • 56
  • 61
  • 68
  • 76
  • 84
  • 94
  • 103
  • 104
  • 117
  • 131
  • 146
  • 162
  • 176
  • 192
  • 207
  • 229
  • 250
  • 279
  • 306
  • 335
  • 370
  • 84
  • 94
  • 102
  • 114
  • 129
  • 146
  • 161
  • 178
  • 194
  • 217
  • 235
  • 258
  • 281
  • 307
  • 336
  • 368
  • 90
  • 99
  • 108
  • 116
  • 124
  • 132
  • 148
  • 173
  • 191
  • 211
  • 235
  • 261
  • 292
  • 326
  • 357
  • 391
  • 118
  • 130
  • 141
  • 152
  • 169
  • 201
  • 221
  • 241
  • 263
  • 291
  • 318
  • 354
  • 387
  • 135
  • 150
  • 160
  • 170
  • 182
  • 194
  • 210
  • 231
  • 232
  • 247
  • 256
  • 262
  • 282
  • 302
  • 330
  • 361
  • 395
  • 441
  • 487
  • 529
  • 149
  • 167
  • 183
  • 199
  • 211
  • 215
  • 235
  • 249
  • 264
  • 277
  • 278
  • 294
  • 297
  • 324
  • 327
  • 362
  • 372
  • 397
  • 431
  • 503
  • 230
  • 262
  • 290
  • 335

Note: For A572 Grade 65 smaller shapes, inquire about availability.

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As your strategic partner, it’s our mission to keep you informed of the latest innovations, design trends, and market analytics. We stay on the forefront of the industry, so we can proactively bring you new opportunities for your business and individual projects to drive progress and growth together.

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Construction Solutions is a nationwide team that is a proactive resource, leveraging Nucor’s unique position in the supply chain and our wealth of experience to assist you at every stage of the design and construction process.

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