331524

Analysis

NAICS 331524 is the 2022 national industry for aluminum foundries (except die-casting), part of 33152 (Nonferrous Metal Foundries). Census lists 7 example activities under it in the official index.

Between 2018 and 2023 the number of establishments fell 21% and employment fell 9%. 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.

County Business Patterns counts 261 US establishments in this code in 2023, employing 13,031 people at an average annual payroll of $66,837 per employee (47th percentile of national industries). 21% of the establishments have fewer than five employees, which points to larger operations.

Its index entries, the activities Census uses to assign businesses to this code, include aluminum castings (except die-castings), unfinished…, aluminum foundries (except die-casting), castings (except die-castings), unfinished, aluminum… and foundries, aluminum (except die-casting), among 7 in all.

For example, manufacturing aluminum die-castings are classified in 331523 (Nonferrous Metal Die-Casting Foundries) instead.

Census lists 1 related activities that belong elsewhere, most often in 331523. Businesses that do several things are classified by their primary activity, the one that generates the most value, so check those boundaries before settling on this code.