NAICS 331524: Aluminum Foundries (except Die-Casting)
This U.S. industry comprises establishments primarily engaged in pouring molten aluminum into molds to manufacture aluminum castings (except nonferrous die-castings). Establishments in this industry purchase aluminum made in other establishments. Cross-References. Establishments primarily engaged in--Show more
NAICS 331524 – Aluminum Foundries (except Die-Casting) encompasses the production of aluminum castings using permanent mold, sand, or other non-die-casting methods to create complex metal components for industrial, aerospace, defense, and transportation applications. This sector focuses on gravity pouring, low-pressure casting, and centrifugal casting techniques to produce high-integrity parts requiring precise dimensional control, thermal stability, and structural strength.
Industry Spending Overview
Federal obligations, top contractors and agencies, and related industry codes for NAICS 331524.
AI Industry Description
NAICS 331524 – Aluminum Foundries (except Die-Casting) encompasses the production of aluminum castings using permanent mold, sand, or other non-die-casting methods to create complex metal components for industrial, aerospace, defense, and transportation applications. This sector focuses on gravity p...
NAICS 331524 – Aluminum Foundries (except Die-Casting) encompasses the production of aluminum castings using permanent mold, sand, or other non-die-casting methods to create complex metal components for industrial, aerospace, defense, and transportation applications. This sector focuses on gravity pouring, low-pressure casting, and centrifugal casting techniques to produce high-integrity parts requiring precise dimensional control, thermal stability, and structural strength. These castings often serve as housings, brackets, engine components, and structural elements in mission-critical systems where material consistency and repeatability are paramount. In government contracting, this NAICS supports defense platforms, naval vessels, ground vehicle systems, and aerospace assemblies, forming an essential link in the supply chain for components that demand lightweight durability and corrosion resistance. No contractor data is available to identify top performers in this NAICS code within the federal marketplace. The competitive landscape likely includes a mix of specialized metal casting houses, medium-sized industrial manufacturers, and small businesses with AS9100 or ISO 9001 certifications, though no dominant primes or subcontractors are currently discernible from procurement records. No agency data is available to identify primary buyers. However, demand is typically driven by the Department of Defense, particularly through the Army, Navy, and Air Force for vehicle and aircraft subsystems, as well as NASA and the Department of Energy for specialized equipment requiring high-performance aluminum alloys. The market context reflects a niche but vital segment within the broader defense industrial base. Opportunities exist for contractors with expertise in aluminum alloy casting, heat treatment, non-destructive testing, and traceability protocols. Procurement is often tied to sustainment of legacy platforms and modernization programs requiring replacement parts with strict material specifications, making technical capability and quality assurance more critical than volume scale.
Small Business Size Standard
The SBA threshold that decides who can bid NAICS 331524 work as a small business.
The SBA cap for this NAICS (13 CFR 121.201). A business at or under it can self-certify as small for work in this code, which is what makes it eligible for a small-business set-aside. The cap is set per NAICS, so the same company can be small in one code and not in another.
13 CFR 121.201, effective January 1, 2026. The SBA revises the table roughly once a year.
Top Contractors
Companies with the highest total award value under NAICS 331524, ranked by dollars won.
| Company | Total Awards | Contracts |
|---|---|---|
| NEW ENGLAND CASTINGS, LLC | $94K | 1 |
Top Agencies
Federal agencies directing the most contract spending toward NAICS 331524.
Competition
How many companies historically bid on federal awards in NAICS 331524, from bidder counts reported on USAspending.
Half or more of reported awards drew exactly one bidder, usually a sign of incumbent-held work rather than an open field. · 287 reported awards
Median Bidders
1
Per reported award, all-time
Single-Bid Awards
67%
Share of reported awards with one bidder
10+ Bidder Awards
0%
Share of reported awards with 10+ bidders
Reported Awards
287
95% of 302 total awards
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 Family | Competition | Median Bidders | Single-Bid | Bidder Mix | Reported Awards |
|---|---|---|---|---|---|
331524This Code Aluminum Foundries (except Die-Casting) | Usually Single-Bid | 1 | 67% | 28795% of 302 | |
33152NAICS Industry | Moderate Competition | 3 | 33% | 5,10283% of 6,172 | |
3315Industry Group Foundries | Moderate Competition | 3 | 36% | 8,13587% of 9,399 | |
331Subsector | Moderate Competition | 3 | 25% | 208,26883% of 251,042 | |
33Sector Manufacturing | Fewer Bidders | 2 | 44% | 16,883,00469% of 24,369,785 |
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.
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