• Aluminum Die-castings
• Aluminum Extruded Products
• Aluminum Foundries
• Aluminum Rolling and Drawing, Nec
• Aluminum Sheet, Plate and Foil
• Blast Furnaces and Steel Mills
• Cold Finishing of Steel Shapes
• Copper Foundries
• Copper Rolling and Drawing
• Electrometallurgical Products
• Gray and Ductile Iron Foundries
• Malleable Iron Foundries
• Metal Heat Treating
• Nonferrous Die-castings Except Aluminum
• Nonferrous Foundries, Nec
• Nonferrous Rolling and Drawing, Nec
• Nonferrous Wiredrawing and Insulating
• Primary Aluminum
• Primary Copper
• Primary Metal Products
• Primary Nonferrous Metals, Nec
• Secondary Nonferrous Metals
• Steel Foundries, Nec
• Steel Investment Foundries
• Steel Pipe and Tubes
• Steel Wire and Related Products