NAICS 3313-digit subsector · NAICS 2022Sector 31-33

NAICS Code 331: Primary Metal Manufacturing

The NAICS code for Primary Metal Manufacturing is 331.

Primary Metal Manufacturing establishments produce iron, steel, aluminum, and other metals from ore or scrap through smelting, refining, and casting operations. Their output feeds fabricated metal, machinery, automotive, and construction industries throughout the economy.

Primary Metal Manufacturing is a 3-digit subsector of the broader Manufacturing (NAICS 31-33) sector.

9,580

Total US Entities

Industry Groups

331

NAICS Code

Classification

Industry Groups (4-digit)

NAICS Code	Industry Group Title	US Entities
3311	NAICS 3311 — Iron and Steel Mills and Ferroalloy Manufacturing	2,602
3312	NAICS 3312 — Steel Product Manufacturing from Purchased Steel	1,573
3313	NAICS 3313 — Alumina and Aluminum Production	1,274
3314	NAICS 3314 — Nonferrous Metal Production	1,542
3315	NAICS 3315 — Foundries	2,589

Sample Data

Sample Companies in This Industry

Subsector 331 — Primary Metal Manufacturing

Company Name	Location	Employees	NAICS Code
Nucor Corporation	Charlotte, NC	10,000+	331

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Other Subsectors in Manufacturing

NAICS 311 — Food Manufacturing42,880 entities

NAICS 312 — Beverage and Tobacco Manufacturing19,850 entities

NAICS 313 — Textile Mills7,941 entities

NAICS 314 — Textile Product Mills15,480 entities

NAICS 315 — Apparel Manufacturing15,086 entities

NAICS 316 — Leather and Allied Product Manufacturing5,431 entities

NAICS 321 — Wood Product Manufacturing31,570 entities

NAICS 322 — Paper Manufacturing18,000 entities

NAICS 323 — Printing and Related Support Activities26,000 entities

NAICS 324 — Petroleum and Coal Products2,000 entities

NAICS 325 — Chemical Manufacturing35,000 entities

NAICS 326 — Plastics and Rubber Products35,000 entities

NAICS 327 — Nonmetallic Mineral Products23,000 entities

NAICS 332 — Fabricated Metal Product Manufacturing72,000 entities

NAICS 333 — Machinery Manufacturing72,000 entities

NAICS 334 — Computer and Electronic Product Manufacturing44,608 entities

NAICS 335 — Electrical Equipment and Appliance Manufacturing20,000 entities

NAICS 336 — Transportation Equipment Manufacturing30,858 entities

NAICS 337 — Furniture and Related Product Manufacturing30,000 entities

NAICS 339 — Miscellaneous Manufacturing45,000 entities

Working with legacy records? convert a NAICS code to SIC using the mapping table — NAICS 2022 at the five-digit industry level paired with SIC 1987 four-digit industries, with coverage gaps stated.