33151

Analysis

NAICS 33151 is the 2022 NAICS industry for ferrous metal foundries, part of 3315 (Foundries). Census lists 39 example activities under it in the official index.

Between 2018 and 2023 the number of establishments fell 16% and employment fell 7%. The 2018 count used NAICS 2017, so part of a large move can come from codes being redefined rather than from businesses opening or closing.

By establishments it ranks 2nd of the 2 codes at this level within Foundries, with 38.7% of them.

County Business Patterns counts 516 US establishments in this code in 2023, employing 57,092 people at an average annual payroll of $69,578 per employee (52nd percentile of national industries). 10% of the establishments have fewer than five employees, which points to larger operations.

Across its national industries Census lists 39 index entries; typical ones are cast iron brake shoes, railroad, manufacturing, foundries, steel investment and alloy steel castings (except investment), unfinished….

Its goods appear in 39 statistical lines of the US tariff schedule, mostly under headings 7307 (tube or pipe fittings (for example, couplings, elbows…), 7325 (other cast articles of iron or steel) and 8455 (metal-rolling mills and rolls therefor; parts thereof). That link is how import data is matched to domestic producers, for example in trade-remedy cases.