2022 NAICS national industry in sector 31-33 Manufacturing
331513 Steel Foundries (except Investment)
NAICS 331513 is the US industry code for steel foundries (except investment). This U.S.
- Code
- 331513 (2022 NAICS)
- Title
- Steel Foundries (except Investment)
- Part of
- Ferrous Metal Foundries
- SBA small business limit
- Up to 700 employees
- Closest UK SIC
- 24310 (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 manufacturing steel castings (except steel investment castings). Establishments in this industry purchase steel made in other establishments.
When to use a different code
Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:
- Manufacturing steel investment castings are classified in U.S. Industry 331512, Steel Investment Foundries.
- Manufacturing steel castings and further manufacturing them into finished products are classified based on the specific finished product.
Activities listed under 331513
The Census index assigns these 8 activities to this code. If your business matches one, this is your code.
- Alloy steel castings (except investment), unfinished, manufacturing
- Cast steel railroad car wheels, unfinished, manufacturing
- Castings, steel (except investment), unfinished, manufacturing
- Foundries, steel (except investment)
- Rolling mill rolls, steel, manufacturing
- Stainless steel castings (except investment), unfinished, manufacturing
- Steel castings (except investment), unfinished, manufacturing
- Steel foundries (except investment)
SBA size standard for 331513
To count as a small business for SBA loans and federal contracts under NAICS 331513, your business (including affiliates) must not exceed 700 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: 2431), 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.