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 Steel70
3315Steel Wiredrawing and Steel Nails and Spikes816
3316Cold-Rolled Steel Sheet, Strip, and Bars157
3317Steel Pipe and Tubes585
Industry Group 332: Iron And Steel Foundries
3321Gray and Ductile Iron Foundries415
3322Malleable Iron Foundries29
3324Steel Investment Foundries242
3325Steel Foundries, Not Elsewhere Classified356
Industry Group 333: Primary Smelting And Refining Of Nonferrous Metals
3331Primary Smelting and Refining of Copper38
3334Primary Production of Aluminum201
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 Metals318
Industry Group 335: Rolling, Drawing, And Extruding Of Nonferrous Metals
3351Rolling, Drawing, and Extruding Of Copper170
3353Aluminum Sheet, Plate, and Foil234
3354Aluminum Extruded Products362
3355Aluminum Rolling and Drawing, Not Elsewhere Classified212
3356Rolling, Drawing, and Extruding of Nonferrous Metals, Except Copper and Aluminum688
3357Drawing and Insulating of Nonferrous Wire545
Industry Group 336: Nonferrous Foundries (castings)
3363Aluminum Die-Castings264
3364Nonferrous Die-Castings, Except Aluminum181
3365Aluminum Foundries489
3366Copper Foundries382
3369Nonferrous Foundries, Except Aluminum and Copper298
Industry Group 339: Miscellaneous Primary Metal Products
3398Metal Heat Treating691
3399Primary Metal Products, Not Elsewhere Classified704