331221 — Rolled Steel Shape Manufacturing
Description
This U.S. industry comprises establishments primarily engaged in rolling or drawing shapes (except wire), such as plate, sheet, strip, rod, and bar, from purchased steel.
Exclusions & Cross-References
- Making steel and rolling or drawing steel shapes, or manufacturing concrete reinforcing bars in an iron and
- steel mill--are classified in Industry 331110, Iron and Steel Mills and Ferroalloy Manufacturing;
- Drawing wire from purchased steel--are classified in U.S. Industry 331222, Steel Wire Drawing; and
- Manufacturing fabricated structural metal products from concrete reinforcing bars and fabricated bar joists-
- are classified in U.S. Industry 332312, Fabricated Structural Metal Manufacturing.
Overview Facts
| NAICS Code | 331221 |
|---|---|
| Industry Title | Rolled Steel Shape Manufacturing |
| SBA Size Standard | 1,000 employees |
| U.S. Establishments | 244 (Census CBP, 2023) |
| IRS PBA Code | 331200 (rolled-up match) |
| Sectors Hierarchy | Sector 31-33 → 331 → 3312 |
| Source / Verified | US Census 2022 NAICS Manual, Census CBP / 2026-06-28 |
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 3312 - Steel Works, Blast Furnaces (via SIC1987:3312→NAICS1997:331221→2002:331221→2007:331221→2012:331221→2017:331221→2022:331221)
- SIC 3316 - Cold-Rolled Steel Sheet, Strip, and Bars (via SIC1987:3316→NAICS1997:331221→2002:331221→2007:331221→2012:331221→2017:331221→2022:331221)
- SIC 3399 - Primary Metal Products, NEC (via SIC1987:3399→NAICS1997:331221→2002:331221→2007:331221→2012:331221→2017:331221→2022:331221)
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 3422 — Rolling Mills and Drawing Machines
- PSC 3422 — Rolling Mills and Drawing Machines
- PSC 9510 — Bars and Rods
- PSC 9515 — Plate, Sheet, Strip, Foil, and Leaf
- PSC 9520 — Structural Shapes
- PSC 9640 — Iron and Steel Primary and Semifinished Products
- PSC 9660 — Precious Metals Primary Forms
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Related Resources & Compliance Guides
Further regulatory reference links for NAICS code 331221:
- 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.
- 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.
Related Industries in 3312
Frequently Asked Questions (FAQ)
Is 331221 a valid 2022 NAICS code?
NAICS 331221 is 'Rolled Steel Shape Manufacturing', a 2022 U.S. national industry under Sector 31-33 (Manufacturing); the SBA small-business size standard is 1,000 employees.
What is the SBA size standard for NAICS 331221?
The SBA small business size standard for NAICS 331221 is 1,000 employees (based on employees).
What is the legacy SIC code mapping for 331221?
NAICS code 331221 maps to the legacy 1987 SIC codes: 3312 - Steel Works, Blast Furnaces, 3316 - Cold-Rolled Steel Sheet, Strip, and Bars, 3399 - Primary Metal Products, NEC.