NAICS Code 331110: Iron and Steel Mills and Ferroalloy Manufacturing
National industry
SBA small business size standard: 1,500 employees
Definition
This industry comprises establishments primarily engaged in one or more of the following: (1) direct reduction of iron ore; (2) manufacturing pig iron in molten or solid form; (3) converting pig iron into steel; (4) making steel; (5) making steel and manufacturing shapes (e.g., bar, plate, rod, sheet, strip, wire); (6) making steel and forming pipe and tube; and (7) manufacturing electrometallurgical ferroalloys. Ferroalloys add critical elements, such as silicon and manganese for carbon steel and chromium, vanadium, tungsten, titanium, and molybdenum for low- and high-alloy metals.
Ferroalloys include iron-rich alloys and more pure forms of elements added during the steel manufacturing process that alter or improve the characteristics of the metal.
Government contracts for this product: PSC 9640 Iron and Steel Primary and Semifinished Products
Code facts
- Part of
-
-
31-33
-
331
-
3311
- 33111
-
3311
-
331
-
31-33
- Contract awards
- 732 In the last 12 months
- Contract obligations
- $83,135,126 In FY2025
NAICS codes and definitions come from the U.S. Census Bureau, size standards from the SBA and contract spending from SAM.gov/FPDS.
Business activities under NAICS 331110
- Armor plate made in iron and steel mills
- Axles, rolled or forged, made in iron and steel mills
- Balls, steel, made in iron and steel mills
- Bars, concrete reinforcing (rebar) made in steel mills
- Bars, iron, made in iron and steel mills
- Bars, steel, made in iron and steel mills
- Billets, steel, made in iron and steel mills
- Blackplate made in iron and steel mills
- Blast furnaces
- Blooms, steel, made in iron and steel mills
- Car wheels, rolled steel, made in iron and steel mills
- Coke oven products made in iron and steel mills
- Concrete reinforcing bar (rebar) made in iron and steel mills
- Direct reduction of iron ore
- Electrometallurgical ferroalloy manufacturing
- Electrometallurgical steel manufacturing
- Fence posts, iron or steel, made in iron and steel mills
- Ferroalloys manufacturing
- Ferrochromium manufacturing
- Ferromanganese manufacturing
- Ferromolybdenum manufacturing
- Ferrophosphorus manufacturing
- Ferrosilicon manufacturing
- Ferrotitanium manufacturing
- Ferrotungsten manufacturing
- Ferrovanadium manufacturing
- Flakes, iron or steel, made in iron and steel mills
- Flats, iron or steel, made in iron and steel mills
- Forgings, iron or steel, made in iron and steel mills
- Frogs, iron or steel, made in iron and steel mills
- Galvanizing metals and metal formed products made in iron and steel mills
- Gun forgings made in iron and steel mills
- High percentage nonferrous alloying elements (i.e., ferroalloys) manufacturing
- Hoops made in iron and steel mills
- Hoops, galvanized, made in iron and steel mills
- Hot-rolling iron or steel products in iron and steel mills
- Ingot made in iron and steel mills
- Iron ore recovery from open hearth slag
- Iron sinter made in iron and steel mills
- Iron, pig, manufacturing
- Manganese metal ferroalloys manufacturing
- Mesh, wire, made in iron and steel mills
- Mini-mills, steel
- Molybdenum silicon ferroalloys manufacturing
- Nut rods, iron or steel, made in iron and steel mills
- Paste, iron or steel, made in iron and steel mills
- Pig iron manufacturing
- Pilings, iron or steel plain sheet, made in iron and steel mills
- Pipe, iron or steel, made in iron and steel mills
- Plate, iron or steel, made in iron and steel mills
- Powder, iron or steel, made in iron and steel mills
- Rail joints and fastenings made in iron and steel mills
- Railroad crossings, iron or steel, made in iron and steel mills
- Rails rerolled or renewed in iron and steel mills
- Rails, iron or steel, made in iron and steel mills
- Rods, iron or steel, made in iron and steel mills
- Rounds, tube, steel, made in iron and steel mills
- Sheet pilings, plain, iron or steel, made in iron and steel mills
- Sheets, steel, made in iron and steel mills
- Shell slugs, steel, made in iron and steel mills
- Silicomanganese ferroalloys manufacturing
- Skelp, iron or steel, made in iron and steel mills
- Slab, steel, made in iron and steel mills
- Spiegeleisen ferroalloys manufacturing
- Spike rods made in iron and steel mills
- Sponge iron
- Stainless steel made in iron and steel mills
- Steel balls made in iron and steel mills
- Steel manufacturing
- Steel mill products (e.g., bar, plate, rod, sheet, structural shapes) manufacturing
- Steel mills
- Steel, from pig iron, manufacturing
- Strip, galvanized iron or steel, made in iron and steel mills
- Strip, iron or steel, made in iron and steel mills
- Structural shapes, iron or steel, made in iron and steel mills
- Superalloys, iron or steel, manufacturing
- Template, made in iron and steel mills, manufacturing
- Terneplate made in iron and steel mills
- Ternes, iron or steel, long or short, made in iron and steel mills
- Tie plates, iron or steel, made in iron and steel mills
- Tin-free steel made in iron and steel mills
- Tinplate made in iron and steel mills
- Tool steel made in iron and steel mills
- Tube rounds, iron or steel, made in iron and steel mills
- Tube, iron or steel, made in iron and steel mills
- Tubing, seamless steel, made in iron and steel mills
- Tubing, wrought iron or steel, made in iron and steel mills
- Well casings, iron or steel, made in iron and steel mills
- Wheels, car and locomotive, iron or steel, made in iron and steel mills
- Wire products, iron or steel, made in iron and steel mills
- Wrought iron or steel pipe and tubing made in iron and steel mills
Show all 91
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Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $0 |
| FY2026 | $225,106,282 |
| FY2025 | $83,135,126 |
| FY2024 | $22,786,032 |
| FY2023 | $37,692,448 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Cbmm North America, Inc. | $100,145,490 | |
| 2 | Cliffs Steel Inc. | $99,990,000 | |
| 3 | Supplycore LLC | $5,548,764 | |
| 4 | Carter Enterprises LLC | $5,092,173 | |
| 5 | Titan Wheel Corporation Of Illinois | $4,377,500 | |
| 6 | Diversified Metals And Alloys, LLC | $4,186,080 | |
| 7 | Rudy Iii, Ernest | $700,679 | |
| 8 | Metco Engineering Corp | $541,732 | |
| 9 | Maher LIMITED | $484,375 | |
| 10 | Super Roco Steel & Tube, LTD. II | $345,336 |
See the full FY2025 ranking of NAICS 331110 contractors, by parent company.
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Defense Logistics Agency | $218,216,838 | |
| 2 | Department of the Army | $5,333,863 | |
| 3 | Department of the Navy | $725,618 | |
| 4 | Department of Justice | $442,076 | |
| 5 | Department of Commerce | $177,919 | |
| 6 | Department of the Treasury | $63,788 | |
| 7 | Department of Agriculture | $58,083 | |
| 8 | Department of the Interior | $44,530 | |
| 9 | National Aeronautics and Space Administration | $25,529 | |
| 10 | Air Force | $18,038 |
Top PSC codes by obligations
| Rank | PSC code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | 9640 Iron and Steel Primary and Semifinished Products | $200,462,975 | |
| 2 | 5450 Miscellaneous Prefabricated Structures | $5,593,294 | |
| 3 | 8470 Armor, Personal | $5,092,173 | |
| 4 | 2530 Vehicular Brake, Steering, Axle, Wheel, and Track Components | $4,377,500 | |
| 5 | 9630 Additive Metal Materials | $4,186,080 | |
| 6 | 9515 Plate, Sheet, Strip, Foil, and Leaf | $1,627,107 | |
| 7 | 9535 Plate, Sheet, Strip, and Foil: Nonferrous Base Metal | $1,448,423 | |
| 8 | 9510 Bars and Rods | $772,946 | |
| 9 | 4710 Pipe, Tube and Rigid Tubing | $581,071 | |
| 10 | 9540 Structural Shapes, Nonferrous Base Metal | $398,217 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | Indiana | $100,276,495 | |
| 2 | Texas | $95,263,177 | |
| 3 | Florida | $10,884,443 | |
| 4 | Illinois | $6,293,986 | |
| 5 | New York | $5,194,049 | |
| 6 | Virginia | $4,289,721 | |
| 7 | California | $663,163 | |
| 8 | Oklahoma | $346,838 | |
| 9 | Michigan | $345,418 | |
| 10 | Wisconsin | $340,645 | |
| 11 | Oregon | $317,642 | |
| 12 | Pennsylvania | $197,859 | |
| 13 | Nebraska | $125,693 | |
| 14 | Georgia | $109,651 | |
| 15 | Ohio | $97,701 | |
| 16 | Connecticut | $87,038 | |
| 17 | Massachusetts | $79,355 | |
| 18 | Arizona | $62,328 | |
| 19 | West Virginia | $45,196 | |
| 20 | Washington | $40,341 | |
| 21 | Maryland | $32,803 | |
| 22 | Alabama | $24,621 | |
| 23 | Louisiana | $22,478 | |
| 24 | New Jersey | $16,104 | |
| 25 | Colorado | $14,976 | |
| 26 | Arkansas | $7,436 | |
| 27 | North Carolina | $3,492 |
Show all 27
Contract opportunities
Show 40 more
Latest 50 of 2,058 listed here. See the rest on GovTribe.
Size standard history
Federal Register rules that named this code
| Final rule | Published | Effective |
|---|---|---|
| Small Business Size Standards for Manufacturing | ||
| Small Business Size Standards; Adoption of 2012 North American Industry Classification System for Size Standards |
From the NAICS codes each rule's amendments to 13 CFR 121.201 name. Rules that print their size standard tables as images aren't listed.
Quick answers
What is NAICS 331110?
NAICS 331110 is Iron and Steel Mills and Ferroalloy Manufacturing, a national industry in NAICS 31-33, Manufacturing.
What is the NAICS code for sponge iron?
The NAICS code for sponge iron is 331110, Iron and Steel Mills and Ferroalloy Manufacturing.
What is the NAICS code for steel mills?
The NAICS code for steel mills is 331110, Iron and Steel Mills and Ferroalloy Manufacturing.
What is the NAICS code for blast furnaces?
The NAICS code for blast furnaces is 331110, Iron and Steel Mills and Ferroalloy Manufacturing.
When did the size standard for NAICS 331110 last change?
The most recent Federal Register rule on record that names NAICS 331110 in the SBA's size standards is "Small Business Size Standards for Manufacturing" (81 FR 4469), published Jan 26, 2016 and effective Feb 26, 2016.
How much do federal agencies spend under NAICS 331110?
Federal contracts under NAICS 331110 obligated $83,135,126 in fiscal year 2025 and $368,719,888 in fiscal years 2023 through 2027.
Who are the largest contractors under NAICS 331110?
The contractors with the most obligated under NAICS 331110 in fiscal years 2026 and 2027 are Cbmm North America, Inc. ($100,145,490); Cliffs Steel Inc. ($99,990,000); and Supplycore LLC ($5,548,764).
Which agencies buy the most under NAICS 331110?
The agencies that obligated the most under NAICS 331110 in fiscal years 2026 and 2027 are Defense Logistics Agency ($218,216,838), Department of the Army ($5,333,863) and Department of the Navy ($725,618).
Which PSC codes are used with NAICS 331110?
The PSC codes with the most obligated under NAICS 331110 in fiscal years 2026 and 2027 are 9640 Iron and Steel Primary and Semifinished Products; 5450 Miscellaneous Prefabricated Structures; and 8470 Armor, Personal.
Where is the work under NAICS 331110 performed?
By place of performance, the states with the most contract obligations under NAICS 331110 over the last 12 months are Indiana ($100,276,495), Texas ($95,263,177) and Florida ($10,884,443).
What is the latest contract opportunity under NAICS 331110?
The latest contract opportunity under NAICS 331110 is Sheet, metal, award notice from Construction and Equipment (DLA), posted October 28, 2026.
On GovTribe
See everything under NAICS 331110
- Federal contract opportunities, awards and IDVs under this code
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