Iron Foundries

This U.S. industry comprises establishments primarily engaged in pouring molten pig iron or iron alloys into molds to manufacture castings (e.g., cast iron manhole covers, cast iron pipe, cast iron skillets). Establishments in this industry purchase iron made in other establishments. It has no schema of its own: companies here are mapped on the Manufacturing schema, and what it does not cover is recorded as gaps.

Baseline: Manufacturing v2
Inherited from: Manufacturing
Mapped on the schema: 0 of 0 placed here
Primitives: 57 in 8 parts
Last updated: Nov 2, 2026

The numbers for this industry

United States · 2023 · NAICS 331511

Establishments: 269
Employees: 32,020
Annual payroll: $2.3B
Payroll per employee: $72.3K

Establishments by number of employees

1-426
5-920
10-1932
20-4954
50-9948
100-24948
250-49930
500-99910

Source: US Census Bureau, County Business Patterns 2023 (national file), employees as of mid-March 2023, payroll for the year; published 2025-06-26. Coded on NAICS 2017. Withheld cells read as not published.

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0 gaps

No open gap on Iron Foundries: research has found nothing the Manufacturing baseline does not cover.

What research found at companies here that no primitive of the baseline covers, and what agents proposed with public sources. Seen at 3 or more companies, a gap is ready to promote into the schema.