Variant of North American Industry Classification System (NAICS) 2022 Version 1.0 for Energy sector

• Non E - Industries not included in the energy sector
• 31-33e - Manufacturing, non E

331 - Primary metal manufacturing

This subsector comprises establishments primarily engaged in smelting and refining ferrous and non-ferrous metals from ore, pig or scrap in blast or electric furnaces. Metal alloys are made with the introduction of other chemical elements. The output of smelting and refining, usually in ingot form, is used in rolling and drawing operations to produce sheet, strip, bars, rods and wire, and in molten form to produce castings and other basic metal products.