NAICS Code 331524 — Aluminum Foundries (except Die-Casting)

National Industry in the official 2022 North American Industry Classification System (U.S. Census Bureau). It is one of 3 national industries under 33152 (Nonferrous Metal Foundries).

Code	331524
Title	Aluminum Foundries (except Die-Casting)
Level	National Industry (6-digit)
Edition	NAICS 2022 edition
SBA size standard	550 employees

Official definition (2022 NAICS)

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.

Is a business under 331524 "small"?

Under the SBA size standards (13 CFR 121.201, effective March 17, 2023), a business classified in NAICS 331524 qualifies as a small business if it does not exceed 550 employees. Small-business status determines eligibility for federal set-aside contracts, SAM.gov certifications and SBA loan programs — employee count is averaged over the latest 24 months.

Where 331524 sits in the hierarchy

Level	Code	Title
Sector	31-33	Manufacturing
Subsector	331	Primary Metal Manufacturing
Industry Group	3315	Foundries
NAICS Industry	33152	Nonferrous Metal Foundries
National Industry	331524	Aluminum Foundries (except Die-Casting)

Related SIC codes

Via the official U.S. Census concordance (1987 SIC ↔ NAICS), shown only where the industry definition is unchanged in NAICS 2022.

SIC code	Title
3365	Aluminum Foundries

Related National Industry codes

• 331523 — Nonferrous Metal Die-Casting Foundries
• 331529 — Other Nonferrous Metal Foundries (except Die-Casting)

Data: official 2022 NAICS structure, descriptions and Census concordances, U.S. Census Bureau — U.S. government works in the public domain (17 U.S.C. §105). Suggested reference, not an official determination.