Metals Sector

Primary Metal Manufacturing (NAICS 331) and Fabricated Metal Product Manufacturing (NAICS 332)

The metals sector is part of the manufacturing sector (NAICS 31 - 33).  It includes the fabricated metals industry, the iron and steel industry, the metal casting industry, and the nonferrous metals industry.

Read more about sectors at the US Census Bureau NAICS site.

Laws and Regulations

• Air:
  • Greenhouse Gas Reporting Program
  • National Emission Standards for Hazardous Air Pollutants (NESHAP):
    • Benzene Waste Operations
    • Chromium Electroplating
    • Coke Ovens: Pushing, Quenching,& Battery Stacks
    • Coke Ovens (Charging, Top Side, and Door Leaks)
    • Degreasing Organic Cleaners (Halogenated Solvent Cleaners)
    • Electric Arc Furnace Steelmaking Facilities (Area Sources)
    • Ferromanganese and Silicomanganese Production (Ferroalloys, Major Sources)
    • Industrial Cooling Towers
    • Integrated Iron and Steel
    • Iron and Steel Foundries (Major Sources)
    • Lime Manufacturing
    • Metal Can (surface coating)
    • Metal Coil (surface coating)
    • Metal Furniture (surface coating)
    • Paper and Other Web (surface coating)
    • Polyvinyl Chloride and Copolymers Production
    • Primary Aluminum
    • Primary Copper
    • Primary Lead Smelting
    • Primary Magnesium Refining
    • Reinforced Plastic Composites Production
    • Secondary Aluminum
    • Secondary Lead Smelters
• Water: 
  • Iron and Steel Rulemaking Process: effluent guidelines. 
  • Metal Products and Machinery: effluent guidelines.

Compliance

• Combustion Portal: compliance assistance center.
• Industrial Materials Recycling: Foundry Sand
• Metals Sector Compliance Assistance: including sector profiles and assistance centers. 
• Mining and Mineral Processing Compliance Assistance Resources for the Gold and Copper Industries (PDF) (19 pp, 703 K) 

Related Technical Information

• AP 42 - Chapter 12: Metallurgical Industry - emission factors and process information for air pollution source categories.

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