SIC 3398 — Metal Heat Treating
SIC 3398 is 'Metal Heat Treating', a 4-digit Standard Industrial Classification (SIC) code under Major Group 33: Primary Metal Industries (Division D: Manufacturing); it maps to modern 2022 NAICS code(s): 332811 (Metal Heat Treating).
Description & Classification
SIC code 3398 representing 'Metal Heat Treating' is an industry category in the Standard Industrial Classification (SIC) system under U.S. OSHA and Federal procurement registers.
Modern NAICS Crosswalk
Trace the modern equivalent classifications in the 2022 North American Industry Classification System (NAICS) database:
- NAICS 332811 - Metal Heat Treating (via SIC1987:3398→NAICS1997:332811→2002:332811→2007:332811→2012:332811→2017:332811→2022:332811)
Classification Details
| SIC Code | 3398 |
|---|---|
| Industry Title | Metal Heat Treating |
| Division | Division D: Manufacturing |
| Major Group | Major Group 33: Primary Metal Industries |
| Source / Verified | US Census 1987 SIC Concordance / 2026-06-28 |
Related Resources & Compliance Guides
Further regulatory reference links for legacy SIC code 3398:
- SIC Codes Complete Compliance Guide — Detailed history and active legal applications of the SIC classification framework.
- Why Legacy SIC Codes Persist Guide — How credit systems and the SEC still rely on SIC metadata.
- SIC ↔ NAICS Crosswalk Tool — Trace industrial code conversions dynamically.
- SIC Major Group 33 Hub — View other legacy industries in this business division.
Related Industries in Major Group 33
3312 - Steel Works, Blast Furnaces...3313 - Electrometallurgical Products, Except St...3315 - Steel Wiredrawing and Steel Nails and Sp...3316 - Cold-Rolled Steel Sheet, Strip, and Bars...3317 - Steel Pipe and Tubes...3321 - Gray and Ductile Iron Foundries...3322 - Malleable Iron Foundries...3324 - Steel Investment Foundries...
Frequently Asked Questions (FAQ)
What industry does SIC code 3398 represent?
SIC 3398 is 'Metal Heat Treating', a 4-digit Standard Industrial Classification (SIC) code under Major Group 33: Primary Metal Industries (Division D: Manufacturing); it maps to modern 2022 NAICS code(s): 332811 (Metal Heat Treating).
What is the modern 2022 NAICS mapping for SIC 3398?
SIC code 3398 maps to modern NAICS codes: 332811 - Metal Heat Treating.