2022 NAICS national industry in sector 31-33 Manufacturing
331512 Steel Investment Foundries
NAICS 331512 is the US industry code for steel investment foundries. This U.S.
- Code
- 331512 (2022 NAICS)
- Title
- Steel Investment Foundries
- Part of
- Ferrous Metal Foundries
- SBA small business limit
- Up to 1,050 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 investment castings. Investment molds are formed by covering a wax shape with a refractory slurry. After the refractory slurry hardens, the wax is melted, leaving a seamless mold. Investment molds provide highly detailed, consistent 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 castings (except steel investment castings) are classified in U.S. Industry 331513, Steel Foundries (except Investment).
- Manufacturing steel investment castings and further manufacturing them into finished products are classified based on the specific finished product.
Activities listed under 331512
The Census index assigns these 4 activities to this code. If your business matches one, this is your code.
- Foundries, steel investment
- Investment castings, steel, unfinished, manufacturing
- Steel investment castings, unfinished, manufacturing
- Steel investment foundries
SBA size standard for 331512
To count as a small business for SBA loans and federal contracts under NAICS 331512, your business (including affiliates) must not exceed 1,050 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.