NAICS 2022 nationalIndustry USA Verified: Census NAICS 2022 · 2026-01-01

NAICS 331313 — Alumina Refining and Primary Aluminum Production

Alumina Refining and Primary Aluminum Production

NAICS 331313 is the national industry code for alumina refining and primary aluminum production establishments in the United States. The Small Business Administration sets a size standard of 1,300 for this classification. It forms part of the hierarchical North American Industry Classification System maintained by the Census Bureau.

SBA: 1,300 View full SBA standard

Related industries in 33131 (Alumina and Aluminum Production and Processing)

View parent 33131

331314

Secondary Smelting and Alloying of Aluminum

331315

Aluminum Sheet, Plate, and Foil Manufacturing

331318

Other Aluminum Rolling, Drawing, and Extruding

Official Inclusions

rolling, drawing, casting or extruding basic shapes, from aluminum produced in the same establishment

Exclusions & Cross-References

Activities classified under other official NAICS codes:

rolling, drawing, extruding or alloying purchased aluminum (See 331317 Aluminum rolling, drawing, extruding and alloying (CAN))

Official Illustrative Examples

Primary activities officially recognized by Census Bureau / Statistics Canada:

alumina (aluminum oxide), refining from bauxite aluminum basic shapes (e.g., bar, ingot, rod, sheet), made in primary aluminum plants primary smelting of aluminum

Complete Index of Activities (16 recognized activities) ▼

alumina (aluminum oxide), refining from bauxite

alumina, refining into aluminum

aluminum alloys, made in primary aluminum plants

aluminum basic shapes (e.g., bar, ingot, rod, sheet), made in primary aluminum plants

aluminum ingot and other primary production shapes, made in primary aluminum plants

aluminum oxide refining

aluminum, producing from bauxite or alumina

bauxite smelting

extrusion ingot, made in primary aluminum plants

ingot, primary aluminum, manufacturing

primary aluminum production and manufacturing aluminum alloys

primary aluminum production and manufacturing aluminum shapes (e.g., bar, ingot, rod, sheet)

primary refining of aluminum

primary smelting of aluminum

rolling, drawing, casting or extruding basic shapes, from aluminum produced in the same establishment

slab, primary aluminum, manufacturing

Official data

Feature	Description
Official name	North American Industry Classification System (NAICS) 2022
Issuing authority	U.S. Census Bureau with OMB, Statistics Canada, and INEGI
Tax authority	Internal Revenue Service (IRS)
Purpose	Statistical business classification and federal contracting (SAM.gov, SBA standards)
Used in	SAM.gov registration, SBA size determinations, IRS tax classification, SEC EDGAR (via SIC crosswalk)
Active since	2022 (current edition)
Hierarchy level	Sector (2-digit)
Source	https://www.census.gov/naics/