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NAICS 331311: Alumina Refining

NAICS 331311

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.

Industry Spending Overview

Federal obligations, top contractors and agencies, and related industry codes for NAICS 331311.

AI Industry Description

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...

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. In the context of government contracting, this industry provides the critical raw materials necessary for aerospace manufacturing, defense infrastructure, and specialized military hardware where high-strength, lightweight metallic components are required.

Key metrics

Federal obligations and activity under NAICS 331311, last 12 months.

Total Obligations

$0

Last 12 months

Average Award Size

$0

Per awarded contract

Opportunities Posted

33

Last 12 months

Active Contracts

4

Currently open

Awarded Contracts

0

Last 12 months

Awards Expiring

0

End date within 12 months

Contractors Awarded

0

Last 12 months

YoY Growth

+0.0%

vs. prior 12 months

Competition

How many companies historically bid on federal awards in NAICS 331311, from bidder counts reported on USAspending.

Fewer Bidders

Median under 3 bidders per reported award. · 37 reported awards

Median Bidders

2

Per reported award, all-time

Single-Bid Awards

43%

Share of reported awards with one bidder

10+ Bidder Awards

0%

Share of reported awards with 10+ bidders

Reported Awards

37

93% of 40 total awards

Bidder Count Distribution by Fiscal Year

Share of reported awards in each bidder-count bracket per federal fiscal year.

How this code compares up the NAICS hierarchy. Parent cohorts pool every code under their prefix, so they are the steadier baseline when a 6-digit sample is thin.

Industry FamilyCompetitionMedian BiddersSingle-BidBidder MixReported Awards
331311This Code
Alumina Refining
Fewer Bidders243%
3793% of 40
33131NAICS Industry
Moderate Competition331%
37,11563% of 59,058
3313Industry Group
Alumina and Aluminum Production and Processing
Moderate Competition331%
37,11563% of 59,058
331Subsector
Moderate Competition325%
209,45383% of 252,541
33Sector
Manufacturing
Fewer Bidders244%
17,021,96069% of 24,591,038

Bidder counts reported on past federal awards in this NAICS (USAspending). An open opportunity has no bidders yet, so this is the historical norm for similar work, not a fact about this solicitation. Not all awards report bidder counts, and fewer bidders often means incumbent-held work rather than an easier win. Federal reporting of bidder counts fell from ~96% of awards (FY2016) to ~30% (FY2018 onward); the chart shows shares of reported awards, and washed-out stretches mark years with fewer than 30 of them.

Related NAICS codes

Industries similar to Alumina Refining, by shared sector, subsector, and industry group.

Alumina Refining and Primary Aluminum Production

This U.S. industry comprises establishments primarily engaged in one or more of the following: (1) r...
331313Same industry groupHigh similarity

Secondary Smelting and Alloying of Aluminum

This U.S. industry comprises establishments primarily engaged in (1) recovering aluminum and aluminu...
331314Same industry groupHigh similarity

Aluminum Sheet, Plate, and Foil Manufacturing

This U.S. industry comprises establishments primarily engaged in (1) flat rolling or continuous cast...
331315Same industry groupHigh similarity

Other Aluminum Rolling, Drawing, and Extruding

This U.S. industry comprises establishments primarily engaged in (1) rolling, drawing, or extruding ...
331318Same industry groupHigh similarity

Iron and Steel Mills and Ferroalloy Manufacturing

This industry comprises establishments primarily engaged in one or more of the following: (1) direct...
331110Same subsectorMedium similarity

Iron and Steel Pipe and Tube Manufacturing from Purchased Steel

This industry comprises establishments primarily engaged in manufacturing welded, riveted, or seamle...
331210Same subsectorMedium similarity

Rolled Steel Shape Manufacturing

This U.S. industry comprises establishments primarily engaged in rolling or drawing shapes (except w...
331221Same subsectorMedium similarity

Steel Wire Drawing

This U.S. industry comprises establishments primarily engaged in drawing wire from purchased steel. ...
331222Same subsectorMedium similarity

Explore contracts across multiple NAICS codes Browse all NAICS Codes

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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

NAICS: 331311
New
DIBBS
Aerospace Grade Sheet/Plate Material SupplyThis subcontract involves the supply of raw aerospace-grade sheet and plate metal for prime contractors supporting DLA Weapons Support ASC projects. The supplier is responsible for sourcing and delivering materials that strictly adhere to TDP Rev A Gen 1 and drawings 98897/98752 specifications. To ensure full traceability and quality assurance, the provider must furnish all necessary material certifications and Mill Test Reports. The contract is managed under the Department of Defense and requires strict compliance with the Buy American Act and Berry Amendment regarding domestic material restrictions. Performance for this requirement is centered at Robins Air Force Base, with the primary objective of delivering certified raw material stock under NAICS code 331311.
DLA WEAPONS SUPPORT ASC SUPPLIER OPER AE AND AF DIV

POSTED

3 days ago

DEADLINE

in 5 days
View Details
NAICS: 331311
DIBBS
Aerospace Grade Material SupplyThis subcontract, managed by the Department of Defense under the DLA Weapons Support ASC Commodities Division, involves the supply of certified aerospace-grade raw material for aircraft stiffener rib production. The materials must strictly adhere to TDP Rev C Gen 8 specifications and include full traceability and Mill Test Reports. To ensure regulatory compliance, all supplies must meet the domestic sourcing requirements of the Buy American Act and the Berry Amendment. The opportunity is designated as a Total Small Business Set-Aside under NAICS code 331311, with the place of performance located at Tinker AFB. Interested parties must respond by November 9, 2026, to provide the necessary materials for prime contractors working on DLA Weapons Support ASC projects.
DLA WEAPONS SUPPORT ASC COMMODITIES DIVISION

POSTED

7 days ago

DEADLINE

in about 15 hours
View Details
NAICS: 331311
Aerospace Specialty Metals SupplyThis subcontract through the Department of the Navy's DLA Aviation office in Philadelphia involves the procurement of raw aerospace-grade specialty metals for fuel tank projects. The selected provider will be responsible for sourcing and delivering certified aluminum, titanium, or steel alloys. All deliveries must be accompanied by Material Test Reports and Certificates of Conformance to ensure quality and technical compliance. Strict adherence to DFARS 252.225-7009 and Buy American requirements is mandatory for this engagement. The contract falls under NAICS code 331311, with performance taking place in Philadelphia. Interested parties must submit their responses by the deadline of November 27, 2026.
Pa DLA Aviation At Philadelphia

POSTED

12 days ago

DEADLINE

in 19 days
View Details
NAICS: 331311
Closed
DIBBS
Aerospace Grade Raw Material SupplyThis subcontract involves the supply of aerospace-grade aluminum or alloy raw metal stock for prime contractors supporting DLA Weapons Support ASC projects. The materials must strictly adhere to the specifications outlined in drawings 81205 BAC5300 and 13873 EI-011420853. To ensure quality and regulatory compliance, all deliveries must include Material Test Reports and Certificates of Conformance, while meeting the requirements of the Buy American Act and the Berry Amendment. Managed by the Department of Defense under NAICS code 331311, the performance of this contract is centered at Tinker AFB. Interested parties must note the response deadline of November 4, 2026, for this procurement effort.
DLA WEAPONS SUPPORT ASC SUPPLIER OPER AE AND AF DIV

POSTED

12 days ago

CLOSED

4 days ago
View Details
NAICS: 331311
Closed
DIBBS
Aerospace Raw Material SupplyThis subcontract for Aerospace Raw Material Supply involves the procurement of certified aerospace-grade aluminum alloy to support prime contractors on DLA Weapons Support ASC projects. The supplier is responsible for sourcing and delivering raw material stock that strictly adheres to SAE AMS QQ-A-250 and SAE AMS QQ-A-250/5 specifications. To ensure quality and compliance, the provider must furnish full material certifications and mill test reports for all deliveries. The contract is managed by the Department of Defense under the DLA Weapons Support ASC Supplier Oper AE and AF Div, with performance taking place in New Cumberland. Strict adherence to the Buy American Act and the Berry Amendment is required. Interested parties must respond by November 3, 2026, regarding this requirement categorized under NAICS code 331311.
DLA WEAPONS SUPPORT ASC SUPPLIER OPER AE AND AF DIV

POSTED

13 days ago

CLOSED

5 days ago
View Details
NAICS: 331311
Closed
DIBBS
Aerospace Grade Sheet Metal/Alloy SupplyThis subcontract involves the supply of raw aerospace-grade aluminum or composite alloys for prime contractors working on DLA aircraft skin projects. The provider is responsible for sourcing and delivering certified materials that meet the technical specifications for NSN 1560011001688, including the provision of Mill Test Reports to ensure full compliance. Due to the nature of the materials, strict adherence to ITAR and EAR regulations for restricted material specifications is required. The contract is managed by the Department of Defense under the DLA Weapons Support ASC Supplier OE and AF Division, with performance taking place in San Diego. The scope of work focuses on the delivery of certified raw material shipments directly to the fabricator. Interested parties should note the response deadline of November 2, 2026, and the classification under NAICS code 331311.
DLA WEAPONS SUPPORT ASC SUPPLIER OPER AE AND AF DIV

POSTED

14 days ago

CLOSED

6 days ago
View Details
NAICS: 331311
Closed
DIBBS
Supply of Hexagon Head Cap Screws (NSN 5305014911451)This subcontract, managed by the Department of Defense under the DLA Weapons Support ASC Commodities Division, involves the supply of high-strength hexagon head cap screws identified by NSN 5305014911451. The manufacturer must produce items according to applicable part standards, ensuring bare items are marked with material symbols and lot numbers per MIL-DTL-1222. Quality control must adhere to sampling plans per MIL-STD-1916 or ASQ H1331, and the provider is required to maintain SAE AS9003 or ISO 9001 certification. Finished products must be delivered palletized and compliant with RP001 and MIL-STD-130N standards. The performance of this contract is centered in New Cumberland, Pennsylvania. Interested parties must respond by October 30, 2026, regarding this requirement categorized under NAICS code 331311.
DLA WEAPONS SUPPORT ASC COMMODITIES DIVISION

POSTED

17 days ago

CLOSED

9 days ago
View Details
NAICS: 331311
Closed
DIBBS
Aerospace Material SupplyThis subcontract, titled Aerospace Material Supply, involves the sourcing and delivery of certified aerospace-grade raw material sheets and plates, including Alclad and Titanium. The materials must meet strict military and aerospace specifications to support prime contractors fulfilling DLA supply contracts. A critical requirement of the agreement is the provision of full material traceability and Mill Test Reports to ensure compliance with DLA quality standards. The contract is managed by the Department of Defense under the DLA Weapons Support ASC Commodities Division and falls under NAICS code 331311. Interested parties must adhere to the timeline established by the posting date of October 19, 2026, with a response deadline set for October 27, 2026.
DLA WEAPONS SUPPORT ASC COMMODITIES DIVISION

POSTED

21 days ago

CLOSED

13 days ago
View Details
NAICS: 331311
Closed
DIBBS
Aluminum Alloy Round Bar SupplierThis subcontract, managed by Construction & Equipment MRO SVC I for the Department of Defense, requires the supply of 625 total feet of aluminum alloy round bars for prime contractors on DLA Troop Support projects. The materials must be provided in lengths of 10 to 12 feet and strictly adhere to SAE AMS4617A, ASTM B660, and ASTM B666 standards. Performance takes place at Robins Air Force Base, with a response deadline set for October 26, 2026. Compliance requirements include QSDL listing for FSGs 95 and 96, adherence to the Buy American Act, and the provision of Mill-Material Certification. Additionally, the supplier must ensure all marking follows MIL-STD-129 and packaging meets MIL-STD-2073-1E specifications. The contract falls under NAICS code 331311.
CONSTRUCTION & EQUIPMENT MRO SVC I

POSTED

24 days ago

CLOSED

13 days ago
View Details
NAICS: 331311
Closed
DIBBS
Supply of ASTM B283/B283M Compliant Metal StockThis subcontract involves the supply of raw metal stock for prime contractors supporting the DLA Weapons Support Land Supply Chain under the Department of Defense. The scope of work requires the provision of aluminum-alloy cold-finished bars that strictly conform to ASTM B283/B283M specifications. To ensure quality and regulatory compliance, the supplier must provide Mill Test Reports certifying metallurgical standards and adherence to environmental restrictions concerning ozone-depleting chemicals and mercury. The project is categorized under NAICS code 331311, with the place of performance located in New Cumberland. Interested parties should note the posting date of October 12, 2026, with a response deadline set for October 23, 2026. The primary objective is the delivery of fully certified raw metal stock to meet the specific technical and environmental requirements of the agency.
DLA WEAPONS SUPPORT LAND SUPPLY CHAIN

POSTED

27 days ago

CLOSED

16 days ago
View Details
NAICS: 331311
Closed
DIBBS
RF-Grade Raw Material SupplyThis subcontract involves the supply of high-conductivity raw metals, specifically RF-grade aluminum or copper alloys, for prime contractors working on projects for the DLA Weapons Support Active Devices Division. The provider is responsible for sourcing and certifying the material stock, ensuring all deliveries are accompanied by Material Test Reports and Certificates of Conformance to maintain strict compliance with DFARS 252.225-7001 Buy American requirements. The contract falls under NAICS code 331311 and is associated with the Department of Defense. Performance of the contract will take place in New Cumberland, Pennsylvania. Interested parties should note the response deadline of October 23, 2026, following the posting date of October 12, 2026.
DLA WEAPONS SUPPORT ACTIVE DEVICES DIVISION

POSTED

27 days ago

CLOSED

16 days ago
View Details
NAICS: 331311
Closed
DIBBS
Aerospace Grade Alloy SupplyThis subcontract, titled Aerospace Grade Alloy Supply, involves the provision of certified raw aerospace-grade alloy sheets for prime contractors supporting DLA Weapons Support ASC projects. The materials must strictly adhere to the specifications outlined in TDP Rev C Gen 6 and drawing EI-011494736. To maintain traceability for these critical application items, the supplier is required to deliver Material Test Reports and Certificates of Conformance along with the raw material stock. The opportunity is issued by the Department of Defense under the DLA Weapons Support ASC Supplier OE and AF Div, with performance taking place at Tinker AFB. This is a Total Small Business Set-Aside under FAR 19.5, categorized under NAICS code 331311. The solicitation was posted on October 12, 2026, with a response deadline of October 20, 2026.
DLA WEAPONS SUPPORT ASC SUPPLIER OPER AE AND AF DIV

POSTED

27 days ago

CLOSED

19 days ago
View Details

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