331492 — Secondary Smelting, Refining, and Alloying of Nonferrous Metal (except Copper and Aluminum)
Description
This U.S. industry comprises establishments primarily engaged in (1) alloying purchased nonferrous metals and/or (2) recovering nonferrous metals from scrap. Establishments in this industry make primary forms (e.g., bar, billet, bloom, cake, ingot, slab, slug, wire) using smelting or refining processes (as defined in the official U.S. Census Bureau 2022 NAICS Manual).
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 3341 - Secondary Smelting and Refining of Nonferrous Metals (via SIC1987:3341→NAICS1997:331492→2002:331492→2007:331492→2012:331492→2017:331492→2022:331492)
- SIC 3399 - Primary Metal Products, NEC (via SIC1987:3399→NAICS1997:331492→2002:331492→2007:331492→2012:331492→2017:331492→2022:331492)
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 9650 — Nonferrous Base Metal Refinery and Intermediate Forms
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Frequently Asked Questions (FAQ)
Is NAICS code 331492 valid in 2022? ▾
Yes, 331492 is a valid 6-digit 2022 NAICS national industry code representing 'Secondary Smelting, Refining, and Alloying of Nonferrous Metal (except Copper and Aluminum)' under Sector 31-33 in the official classification index.
What is the SBA size standard for NAICS code 331492? ▾
The Small Business Administration (SBA) has established a small business size standard of 850 employees for NAICS code 331492 (Secondary Smelting, Refining, and Alloying of Nonferrous Metal (except Copper and Aluminum)), calculated based on employees.
What is the legacy SIC equivalent for NAICS 331492? ▾
According to official Census Bureau concordance tables, NAICS code 331492 (Secondary Smelting, Refining, and Alloying of Nonferrous Metal (except Copper and Aluminum)) maps to legacy 1987 Standard Industrial Classification (SIC) codes: 3341 - Secondary Smelting and Refining of Nonferrous Metals, 3399 - Primary Metal Products, NEC.
Related Pages & Tools
Further regulatory reference links for NAICS code 331492:
- 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 331492 to SIC Crosswalk — Bidirectional mapping to legacy SIC codes (Secondary Smelting, Refining, and Alloying of Nonferrous Metal (except Copper and Aluminum)).
- 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.