NAICS 331110 - Iron and Steel Mills and Ferroalloy Manufacturing

This industry comprises establishments primarily engaged in one or more of the following: (1) direct reduction of iron ore; (2) manufacturing pig iron in molten or solid form; (3) converting pig iron into steel; (4) making steel; (5) making steel and manufacturing shapes (e.g., bar, plate, rod, sheet, strip, wire); (6) making steel and forming pipe and tube; and (7) manufacturing electrometallurgical ferroalloys. Ferroalloys add critical elements, such as silicon and manganese for carbon steel and chromium, vanadium, tungsten, titanium, and molybdenum for low- and high-alloy metals. Ferroalloys include iron-rich alloys and more pure forms of elements added during the steel manufacturing process that alter or improve the characteristics of the metal.

• Includes establishments engaged in iron ore reduction and pig iron manufacturing.
• Covers steel production and manufacturing of steel shapes, pipes, and tubes.
• Encompasses production of electrometallurgical ferroalloys used to enhance steel properties.
• Subject to size standards typically based on employee count or revenue thresholds.
• Supports infrastructure, defense, transportation, and construction sectors.
• Involves both integrated steel mills and specialized ferroalloy producers.

• Direct reduction of iron ore to produce iron.
• Manufacturing pig iron in molten or solid form.
• Converting pig iron into various types of steel.
• Forming steel into bars, plates, rods, sheets, strips, and wires.
• Producing steel pipes and tubes for industrial applications.
• Manufacturing electrometallurgical ferroalloys to improve steel quality.
• Supplying steel products for defense and infrastructure projects.
• Implementing quality control and metallurgical testing for steel products.

• Integrated steel mills producing raw and finished steel products.
• Specialized ferroalloy manufacturing companies.
• Steel fabrication and processing plants.
• Defense contractors requiring steel materials.
• Infrastructure material suppliers for government projects.
• Metal alloy research and testing laboratories.