2022 NAICS national industry in sector 31-33 Manufacturing
331524 Aluminum Foundries (except Die-Casting)
NAICS 331524 is the US industry code for aluminum foundries (except die-casting). This U.S.
- Code
- 331524 (2022 NAICS)
- Title
- Aluminum Foundries (except Die-Casting)
- Part of
- Nonferrous Metal Foundries
- SBA small business limit
- Up to 550 employees
- Closest UK SIC
- 24320 (details)
Changes coming. The NAICS 2027 revision applies to data from 1 January 2027, and SBA proposed new size standards on 20 August 2026. The values on this page are the ones in force today; we update this page when the official files change.
Official definition
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.
When to use a different code
Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:
- Manufacturing aluminum die-castings are classified in U.S. Industry 331523, Nonferrous Metal Die-Casting Foundries.
- Manufacturing aluminum or aluminum alloy castings and further manufacturing them into finished products are classified based on the specific finished product.
Activities listed under 331524
The Census index assigns these 7 activities to this code. If your business matches one, this is your code.
- Aluminum castings (except die-castings), unfinished, manufacturing
- Aluminum foundries (except die-casting)
- Castings (except die-castings), unfinished, aluminum, manufacturing
- Foundries, aluminum (except die-casting)
- Investment castings, aluminum, unfinished, manufacturing
- Permanent mold castings, aluminum, unfinished, manufacturing
- Sand castings, aluminum, unfinished, manufacturing
SBA size standard for 331524
To count as a small business for SBA loans and federal contracts under NAICS 331524, your business (including affiliates) must not exceed 550 employees. Check your business.
Source: SBA table of size standards, effective March 17, 2023.
Closest UK SIC 2007 codes
There is no official one-to-one link between NAICS and UK SIC. These codes share the same international class (ISIC Rev. 4: 2432), so treat them as a starting point and check the definition.
Built from Census concordances 2022→2017 NAICS and 2017 NAICS→ISIC Rev. 4.
Similar codes to compare
Data last changed November 14, 2026. How this page is built.