NAICS Code 3315 — Foundries

Industry Group in the official 2022 North American Industry Classification System (U.S. Census Bureau). It contains 2 direct sub-codes.

Code	3315
Title	Foundries
Level	Industry Group (4-digit)
Edition	NAICS 2022 edition

Official definition (2022 NAICS)

This industry group comprises establishments primarily engaged in pouring molten metal into molds or dies to form castings. Establishments making castings and further manufacturing, such as machining or assembling, a specific manufactured product are classified in the industry of the finished product. Foundries may perform operations, such as cleaning and deburring, on the castings they manufacture. More involved processes, such as tapping, threading, milling, or machining to tight tolerances, that transform castings into more finished products are classified elsewhere in the Manufacturing sector based on the product made.

Establishments in this industry group make castings from purchased metals or in integrated secondary smelting and casting facilities. When the production of primary metals is combined with making castings, the establishment is classified in Subsector 331, Primary Metal Manufacturing, with the primary metal made.

Where 3315 sits in the hierarchy

Level	Code	Title
Sector	31-33	Manufacturing
Subsector	331	Primary Metal Manufacturing
Industry Group	3315	Foundries

Codes under 3315

Code	Title
33151	Ferrous Metal Foundries
33152	Nonferrous Metal Foundries

Related Industry Group codes

• 3311 — Iron and Steel Mills and Ferroalloy Manufacturing
• 3312 — Steel Product Manufacturing from Purchased Steel
• 3313 — Alumina and Aluminum Production and Processing
• 3314 — Nonferrous Metal (except Aluminum) Production and Processing

Data: official 2022 NAICS structure, descriptions and Census concordances, U.S. Census Bureau — U.S. government works in the public domain (17 U.S.C. §105). Suggested reference, not an official determination.