Major Group: 33—Primary Metal Industries

This major group includes establishments engaged in smelting and refining ferrous and nonferrous metals from ore, pig, or scrap; in rolling, drawing, and alloying metals; in manufacturing castings and other basic metal products; and in manufacturing nails, spikes, and insulated wire and cable. This major group includes the production of coke. Establishments primarily engaged in manufacturing metal forgings or stampings are classified in Industry Group 346.

Codes Titles Number of US Businesses
Industry Group 331: Steel Works, Blast Furnaces, And Rolling And Finishing Mills
3312Steel Works, Blast Furnaces (Including Coke Ovens), and Rolling Mills2,547
3313Electrometallurgical Products, Except Steel71
3315Steel Wiredrawing and Steel Nails and Spikes816
3316Cold-Rolled Steel Sheet, Strip, and Bars165
3317Steel Pipe and Tubes591
Industry Group 332: Iron And Steel Foundries
3321Gray and Ductile Iron Foundries425
3322Malleable Iron Foundries29
3324Steel Investment Foundries248
3325Steel Foundries, Not Elsewhere Classified357
Industry Group 333: Primary Smelting And Refining Of Nonferrous Metals
3331Primary Smelting and Refining of Copper40
3334Primary Production of Aluminum202
3339Primary Smelting and Refining of Nonferrous Metals, Except Copper and Aluminum490
Industry Group 334: Secondary Smelting And Refining Of Nonferrous Metals
3341Secondary Smelting and Refining of Nonferrous Metals330
Industry Group 335: Rolling, Drawing, And Extruding Of Nonferrous Metals
3351Rolling, Drawing, and Extruding Of Copper173
3353Aluminum Sheet, Plate, and Foil242
3354Aluminum Extruded Products370
3355Aluminum Rolling and Drawing, Not Elsewhere Classified228
3356Rolling, Drawing, and Extruding of Nonferrous Metals, Except Copper and Aluminum700
3357Drawing and Insulating of Nonferrous Wire559
Industry Group 336: Nonferrous Foundries (castings)
3363Aluminum Die-Castings266
3364Nonferrous Die-Castings, Except Aluminum179
3365Aluminum Foundries496
3366Copper Foundries393
3369Nonferrous Foundries, Except Aluminum and Copper307
Industry Group 339: Miscellaneous Primary Metal Products
3398Metal Heat Treating719
3399Primary Metal Products, Not Elsewhere Classified682