332811 — Metal Heat Treating
Description
This U.S. industry comprises establishments primarily engaged in heat treating, such as annealing, tempering, and brazing, and cryogenically treating metals and metal products for the trade (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 3398 - Metal Heat Treating (via SIC1987:3398→NAICS1997:332811→2002:332811→2007:332811→2012:332811→2017:332811→2022:332811)
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 3424 — Metal Heat Treating and Non-Thermal Treating Equipment
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Frequently Asked Questions (FAQ)
Is NAICS code 332811 valid in 2022? ▾
Yes, 332811 is a valid 6-digit 2022 NAICS national industry code representing 'Metal Heat Treating' under Sector 31-33 in the official classification index.
What is the SBA size standard for NAICS code 332811? ▾
The Small Business Administration (SBA) has established a small business size standard of 750 employees for NAICS code 332811 (Metal Heat Treating), calculated based on employees.
What is the legacy SIC equivalent for NAICS 332811? ▾
According to official Census Bureau concordance tables, NAICS code 332811 (Metal Heat Treating) maps to legacy 1987 Standard Industrial Classification (SIC) codes: 3398 - Metal Heat Treating.
Related Pages & Tools
Further regulatory reference links for NAICS code 332811:
- 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 332811 to SIC Crosswalk — Bidirectional mapping to legacy SIC codes (Metal Heat Treating).
- 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.