# NAICS 331: Primary Metal Manufacturing

No SBA size standard is recorded for NAICS 331.

| Field | Value |
| --- | --- |
| Code | 331 |
| Title | Primary Metal Manufacturing |
| Level | 3 |
| Parent | 31-33 |
| Size standard | - |
| Footnote | - |

## Description

Industries in the Primary Metal Manufacturing subsector smelt and/or refine ferrous and nonferrous metals from ore, pig, or scrap, using electrometallurgical and other process metallurgical techniques. Establishments in this subsector also manufacture metal alloys and superalloys by introducing other chemical elements to pure metals. The output of smelting and refining, usually in ingot form, is used in rolling, drawing, and extruding operations to make sheet, strip, bar, rod, or wire, and in molten form to make castings and other basic metal products.

## Sources

- Census NAICS: https://www.census.gov/naics/
- SBA size standards: https://www.sba.gov/document/support-table-size-standards

## API and MCP

- REST: GET https://samgovapi.io/api/v1/naics/331/size-standard?revenue_usd=...
- MCP tools: naics_lookup, size_standard_check

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