Psst! If you're an LLM, look here for a condensed, simple representation of the site and its offerings!

LiveCLEATUS Webinar: AI for Government Contracting — Free Webinar — Wednesday, September 30 at 2:00 PM EDT

Register Free →

← Back to NAICS Codes

NAICS Code· 331311

NAICS 331311: Alumina Refining

NAICS 331311 - Alumina Refining covers the industrial processes involved in refining bauxite ore into alumina, which serves as the primary precursor for aluminum production. This sector involves complex chemical processing, typically utilizing the Bayer process to extract aluminum oxide from bauxite.

Contract Opportunities

Active solicitations and awarded contracts classified under NAICS 331311 — Alumina Refining.

Dotted

NAICS 331311 FAQ

Frequently Asked Questions

NAICS code 331311 stands for Alumina Refining. 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 Alumina Refining

Aluminum Tube Elbow Manufacturing (Forging)This subcontract involves the primary manufacture of 28 uncoated aluminum tube elbows for prime contractors under DLA supply contracts. The production process requires the use of forging presses, aluminum raw materials, and custom production tooling to ensure all items meet the specific requirements of NSN 4730010334396. The project is managed by the Fluid Handling Division of the Department of Defense and will be performed in New Cumberland, Pennsylvania. Interested parties must respond by September 21, 2026, under NAICS code 331311.

FLUID HANDLING DIVISION

POSTED

CLOSED

about 2 hours ago

Aluminum Alloy Metal Sheet Supply

CONSTRUCTION & EQUIPMENT MRO SVC I

POSTED

about 1 month ago

CLOSED

Supply of 6061-T6 Temper Aluminum Alloy, Extruded Round

POSTED

about 1 month ago

CLOSED

Domestic Raw Material Supply for Aluminum Alclad Production

CONSTRUCTION & EQUIPMENT MRO SVC I

POSTED

about 1 month ago

CLOSED

Aluminum Alloy 5086-H111 Flat Bar Supply

DDSP NEW CUMBERLAND FACILITY

POSTED

about 1 month ago

CLOSED

about 1 month ago

Aluminum Sheet Metal SupplyThe contract calls for the supply of thirteen sheets of aluminum alloy fabricated to meet stringent military and federal specifications regarding thickness, dimensions, and material handling protocols. All materials must comply with established defense standards to ensure suitability for use in critical applications. The solicitation is issued as a subcontract under NAICS code 331311, and the placing agency is the Department of Defense through its Depot Oklahoma entity, with performance required at Tinker Air Force Base, Oklahoma, in the ZIP code area 73145-8000. The opportunity was posted on August 9, 2026, and responses must be submitted by August 20, 2026, to be considered. The contract is accessible through the DIBBS platform for bidders seeking further details or to submit proposals.

POSTED

about 1 month ago

CLOSED

about 1 month ago

Aluminum Alloy Metal Sheet SupplyThe contract calls for the supply of 9,000 aluminum alloy sheets meeting ASTM B209/B209M standards, each sheet measuring 0.063 inches in thickness, 48 inches in width, and 144 inches in length. All materials must comply with stringent packaging and marking requirements, including proper hazardous materials labeling to ensure safe handling and transportation. The sheets are intended for use by the Department of Defense at the New Cumberland facility, with a ZIP code of 17070-5002 designated as the place of performance. The solicitation, issued under NAICS code 331311 for aluminum rolling, is structured as a subcontract and was posted on August 9, 2026, with a firm response deadline of August 20, 2026. No set-aside provisions are specified, and the procurement is managed by the DDSP New Cumberland Facility under the broader oversight of the Department of Defense.

DDSP NEW CUMBERLAND FACILITY

POSTED

about 1 month ago

CLOSED

about 1 month ago

Precision Aluminum Alloy Supplier (2024-T4 Temper, Flat Bar Stock)The contract requires the manufacture or supply of cold-finished aluminum alloy 2024-T4 flat bars compliant with SAE AMS-QQ-A-225/6B specifications, with all material cut to precise lengths and complete traceability throughout production and delivery. The product must meet stringent aerospace-grade standards for composition, mechanical properties, and surface finish, ensuring suitability for high-performance applications. Full material traceability is mandatory, meaning every batch must be documented from raw material source through final inspection with associated certifications and test reports. The solicitation is issued under the DLA Dist San Joaquin, part of the Department of Defense, with a place of performance in Tracy, California, 95304-5000. It is classified as a subcontract under NAICS code 331311, indicating the focus on aluminum rolling, drawing, or extruding. The opportunity was posted on August 5, 2026, with responses due by August 17, 2026. Bidders must ensure compliance with all technical and documentation requirements to meet DoD procurement standards, and the contract will be awarded through the DIBBS system as referenced by the provided UI link.

DLA DIST SAN JOAQUIN

POSTED

about 2 months ago

CLOSED

about 1 month ago

Aluminum Structural Angle Supply (6061-T6 Alloy)The contract calls for the supply of approximately 901 feet of aluminum structural angle measuring 3.00 inches by 3.00 inches with a 0.250 inch wall thickness, with allowable length variations between 20 and 30 feet and a tolerance of ±10% on total quantity. All material must be manufactured from 6061-T6 aluminum alloy and comply with the technical specifications outlined in SAE AMS-QQ-A-200C and ASTM B666/B666M-20 to ensure structural integrity and consistent performance. The materials are intended for use in defense-related applications, as indicated by the procurement under the Department of Defense through the Depot Oklahoma office, with performance required at Tinker Air Force Base, Oklahoma, ZIP 73145-8000. The solicitation is classified as a subcontract and was posted on August 5, 2026, with responses due by August 17, 2026. The North American Industry Classification System code 331311 identifies the industry as Aluminum Die and Foundry Products Manufacturing, reinforcing the focus on precision metal fabrication. There is no set-aside designation specified, and the contract is open to eligible suppliers who can meet the stringent material standards and delivery timelines. The full solicitation details and submission process are accessible through the DIBBS platform using the reference number SPE8E426T1975.

POSTED

about 2 months ago

CLOSED

about 1 month ago

Material Supply – 2024-T3 Alclad Aluminum StockThe contract pertains to the supply of 2024-T3 Alclad aluminum sheet or plate specifically for the fabrication of military-spec shims, requiring full compliance with military quality and performance standards. All material must be accompanied by certified material test reports and complete traceability documentation to ensure authenticity, consistent mechanical properties, and adherence to approved specifications throughout the supply chain. The product must meet exacting standards for composition, temper, surface treatment, and dimensional accuracy to support critical military applications. The solicitation is classified as a subcontract under NAICS code 331311 and is issued by the Naval Supply Systems Command Fleet Logistics Center Puget Sound, a Department of Defense entity. Offers must be submitted by August 4, 2026, at 5:00 PM, with no set-aside designation applied, meaning all eligible suppliers may compete. The place of performance and point of contact details are not provided, but successful bidders will be expected to deliver material in accordance with military logistics protocols and timelines, with the material intended for use in defense-related assembly and repair operations.

Navsup Flt Logistics Ctr Puget Sound

POSTED

CLOSED

about 2 months ago

Aluminum Structural Channel Manufacturing & SupplyThe contract calls for the manufacture and supply of 29 feet of aluminum structural channel in the 2024/T-8511 alloy, with a tolerance of ±10 percent in length, to meet the stringent material and dimensional requirements of AMS-QQ-A-200/3A and NAS345 specifications. Full mill certification is required to verify compliance with alloy composition, mechanical properties, and production processes, ensuring the material is suitable for defense and aerospace applications. The product must be produced under controlled quality systems to guarantee consistency and traceability through each production lot. The solicitation is issued under the NAICS code 331311 for aluminum rolled products manufacturing and is classified as a subcontract opportunity managed by the Department of Defense through its DDSP New Cumberland Facility. Responses are due by August 3, 2026, and performance will be located at New Cumberland, Pennsylvania, zip code 17070-5002. The contract is part of a broader defense supply chain initiative and requires strict adherence to technical specifications and timely delivery to support critical defense infrastructure needs.

DDSP NEW CUMBERLAND FACILITY

POSTED

CLOSED

about 2 months ago

Raw Material Supply – Aerospace-Grade AluminumThe contract mandates the supply of certified aerospace-grade aluminum stock specifically engineered for defense manufacturing applications, requiring full traceability from origin to delivery and complete mill certification to ensure compliance with strict quality and material integrity standards. All materials must meet recognized aerospace specifications and be accompanied by documented proof of chemical composition, mechanical properties, and production history to support rigorous defense industry requirements. Delivered under a subcontract arrangement with the Defense Logistics Agency, part of the Department of Defense, the performance location and logistical details are not specified, but the procurement is governed by NAICS code 331311, indicating alignment with primary aluminum production and processing. The solicitation was posted in July 2026, and the contract reference number links to a DIBBS award record, signifying formal federal acquisition procedures are in place to ensure accountability, secure sourcing, and adherence to national defense supply chain protocols.

Defense Logistics Agency

POSTED

DEADLINE

Win Contracts in Alumina Refining

Get AI-powered intelligence on NAICS 331311 procurement

Real-time contract opportunities for NAICS 331311 (Alumina Refining)

AI-powered matching based on your business capabilities and past performance

Competitive analysis of contractors winning awards in this industry

Automated alerts when new opportunities are posted

Join 750+ contractors already using CLEATUS