NAICS 331521: Aluminum Die-Casting Foundries
NAICS 331521 - Aluminum Die-Casting Foundries covers the specialized manufacturing of aluminum components through the die-casting process. This industry involves forcing molten aluminum under high pressure into steel molds to create complex, high-precision parts with consistent dimensions and surface finishes.
Industry Spending Overview
Federal obligations, top contractors and agencies, and related industry codes for NAICS 331521.
AI Industry Description
NAICS 331521 - Aluminum Die-Casting Foundries covers the specialized manufacturing of aluminum components through the die-casting process. This industry involves forcing molten aluminum under high pressure into steel molds to create complex, high-precision parts with consistent dimensions and surfac...
NAICS 331521 - Aluminum Die-Casting Foundries covers the specialized manufacturing of aluminum components through the die-casting process. This industry involves forcing molten aluminum under high pressure into steel molds to create complex, high-precision parts with consistent dimensions and surface finishes. In the government contracting landscape, these services are critical for producing lightweight, durable structural components, engine parts, and housings used in aerospace, defense, and automotive applications.
Competition
How many companies historically bid on federal awards in NAICS 331521, 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. · 121 reported awards
Median Bidders
1
Per reported award, all-time
Single-Bid Awards
56%
Share of reported awards with one bidder
10+ Bidder Awards
2%
Share of reported awards with 10+ bidders
Reported Awards
121
95% of 127 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 |
|---|---|---|---|---|---|
331521This Code Aluminum Die-Casting Foundries | Usually Single-Bid | 1 | 56% | 12195% of 127 | |
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.
Related NAICS Codes
Industries similar to Aluminum Die-Casting Foundries, by shared sector, subsector, and industry group.
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