331512 — Steel Investment Foundries
Description
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 (as defined in the official U.S. Census Bureau 2022 NAICS Manual).
Exclusions & Cross-References
- Manufacturing steel castings (except steel investment castings)--are classified in U.S. Industry 331513,
- Steel Foundries (except Investment); and
- Manufacturing steel investment castings and further manufacturing them into finished products--are
- classified based on the specific finished product.
Overview Facts
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 3324 - Steel Investment Foundries (via SIC1987:3324→NAICS1997:331512→2002:331512→2007:331512→2012:331512→2017:331512→2022:331512)
Suggested Product Service Codes (Advisory)
The following Product Service Codes (PSCs) are advisory suggestions aligned with this NAICS code. Note: NAICS and PSC codes map to different dimensions of procurement (industry vs. product/service). There is no official binding 1:1 crosswalk.
- PSC 3680 — Foundry Machinery, Related Equipment and Supplies.
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Frequently Asked Questions (FAQ)
Is NAICS code 331512 valid in 2022? ▾
Yes, 331512 is a valid 6-digit 2022 NAICS national industry code representing 'Steel Investment Foundries' under Sector 31-33 in the official classification index.
What is the SBA size standard for NAICS code 331512? ▾
The Small Business Administration (SBA) has established a small business size standard of 1,050 employees for NAICS code 331512 (Steel Investment Foundries), calculated based on employees.
What is the legacy SIC equivalent for NAICS 331512? ▾
According to official Census Bureau concordance tables, NAICS code 331512 (Steel Investment Foundries) maps to legacy 1987 Standard Industrial Classification (SIC) codes: 3324 - Steel Investment Foundries.
Related Pages & Tools
Further regulatory reference links for NAICS code 331512:
- Sector 31-33 Directory Hub — List of related industries in the Manufacturing sector.
- SIC ↔ NAICS Crosswalk Tool — Look up mappings between legacy SIC codes and modern classifications.
- NAICS 331512 to SIC Crosswalk — Bidirectional mapping to legacy SIC codes (Steel Investment Foundries).
- SBA Size Standards Guide — Complete rules and averaging periods for small business classifications.
- Calculating Annual Receipts Guide — Detailed worked example of revenue calculation rules.
- IRS Principal Business Activity Guide — How NAICS codes map to corporate and entity tax filings.