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NAICS Code· 331111

NAICS 331111: Iron and Steel Mills

NAICS 331111 - Iron and Steel Mills covers the primary production of iron and steel, including the operation of blast furnaces and electric arc furnaces to produce raw steel and iron products. This industry provides the foundational metallic materials required for heavy infrastructure, vehicle manufacturing, and defense hardware.

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Contract Opportunities

Active solicitations and awarded contracts classified under NAICS 331111 — Iron and Steel Mills.

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NAICS 331111 FAQ

Frequently Asked Questions

NAICS code 331111 stands for Iron and Steel Mills. It is a North American Industry Classification System code used by the federal government to classify business activity for procurement and contracting purposes.

Recently Posted in Iron and Steel Mills

Raw Material Supplier (Steel/Iron Castings)

LAND SUPPLIER OPNS VEHICLE SPT

POSTED

DEADLINE

Casting Production for NSN 5342011360989

ASC SUPPLIER OPER AE AND AF DIV

POSTED

DEADLINE

Stainless Steel Anchors and Fastener SupplyThis subcontract, managed by the Department of Defense through the US Army Engineer District Walla Walla, involves the supply of corrosion-resistant anchors and fasteners for prime contractors working on the USACE Lower Monumental Dam projects in Kahlotus, Washington. The scope of work requires the delivery of 250 3/4 inch ASTM Type 316 Stainless Steel undercut anchors, 30 hex head bolts, and 1,000 hot dipped galvanized steel G-Clip grating fasteners. All supplied materials must strictly comply with ASTM F468 and F467 standards, and the provider is required to submit Certified Mill Test Reports. This opportunity is designated as a Total Small Business Set Aside under NAICS code 331111, with a response deadline of September 14, 2026.

US Army Engineer District Walla Wal

POSTED

DEADLINE

Supply of Structural Aluminum Plate (AI)

ASC SUPPLIER OPER AE AND AF DIV

POSTED

CLOSED

Domestic Metal Forging and Raw Material SupplyThe Department of Defense, through the ASC Commodities Division, is seeking a subcontract for the supply of domestically sourced high-strength aluminum or titanium alloy billet. These materials are intended for structural aircraft plate production and must include full traceability and mill certification. The contract is designated as a Women-Owned Small Business Set-Aside under NAICS code 331111. The procurement was posted on August 27, 2026, with a response deadline of September 1, 2026. Performance for this contract will take place in Jacksonville, Florida. Interested parties can find further details via the DIBBS portal.

ASC COMMODITIES DIVISION

POSTED

CLOSED

Domestic Material Sourcing and ComplianceThe Department of Defense, through the ASC Commodities Division, is seeking a subcontract for the supply and certification of domestically sourced raw materials, specifically steel and alloys, to be used in the manufacturing of defense components. This requirement falls under NAICS code 331111 and is focused on ensuring material compliance and domestic sourcing standards. The opportunity was posted on August 25, 2026, with a response deadline of September 2, 2026. Performance for this contract will take place in Kodiak, Alaska. Interested parties can find further details via the DIBBS procurement portal.

ASC COMMODITIES DIVISION

POSTED

CLOSED

Specialized Material Supply (Gear-Grade Alloy)The Department of Defense, through Land Supplier Opns Engines, is seeking a subcontractor for the supply of certified alloy steel raw material. This material must meet strict military specifications and traceability requirements to ensure suitability for manufacturing the precision spur gear sector. The procurement is categorized under NAICS code 331111 and will be performed in Tracy, California. Interested parties must submit their responses by September 4, 2026, following the posting date of August 24, 2026.

LAND SUPPLIER OPNS ENGINES

POSTED

CLOSED

Precision Metal Sheet Manufacturing (Cold-Rolled Stainless Steel)This subcontract through the Department of Defense involves the manufacture and supply of cold-rolled, solution heat-treated stainless steel sheets using CRES Comp 301. The materials must be produced to exact dimensions of 0.040 inches thick, 36 inches wide, and 120 inches long, with lengths restricted to whole feet. Each individual sheet is estimated to weigh approximately 50.11 lbs. The project is managed by Construction & Equipment MRO SVC I under NAICS code 331111, with the place of performance located at Tinker AFB in zip code 73145-8000. The solicitation was posted on August 24, 2026, and requires a response by September 4, 2026.

CONSTRUCTION & EQUIPMENT MRO SVC I

POSTED

CLOSED

Domestic Component and Material Sourcing

ASC SUPPLIER OPER OEM DIVISION

POSTED

CLOSED

Domestic Steel Raw Material Supply

DDSP NEW CUMBERLAND FACILITY

POSTED

CLOSED

Industrial Metal Raw Material SupplyThe Industrial Metal Raw Material Supply subcontract, issued by the Department of Defense ASC Commodities Division, seeks a provider for carbon steel or specified alloy materials in coil or sheet form. These materials are specifically required for the stamping of flat washers and must be delivered with full material traceability and certification to ensure quality and compliance. The procurement is categorized under NAICS code 331111 and will be performed in New Cumberland, Pennsylvania. Interested parties must submit their responses by the deadline of August 24, 2026, following the posting date of August 16, 2026.

ASC COMMODITIES DIVISION

POSTED

CLOSED

Supply of Raw Materials for Container Fabrication

Defense Logistics Agency

POSTED

DEADLINE

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