Standard Industrial Code Divisions

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 Total Marketable US Businesses
Industry Group 331: Steel Works, Blast Furnaces, And Rolling And Finishing Mills
3312Steel Works, Blast Furnaces (Including Coke Ovens), and Rolling Mills2,541
3313Electrometallurgical Products, Except Steel73
3315Steel Wiredrawing and Steel Nails and Spikes690
3316Cold-Rolled Steel Sheet, Strip, and Bars144
3317Steel Pipe and Tubes601
Industry Group 332: Iron And Steel Foundries
3321Gray and Ductile Iron Foundries440
3322Malleable Iron Foundries33
3324Steel Investment Foundries230
3325Steel Foundries, Not Elsewhere Classified281
Industry Group 333: Primary Smelting And Refining Of Nonferrous Metals
3331Primary Smelting and Refining of Copper36
3334Primary Production of Aluminum179
3339Primary Smelting and Refining of Nonferrous Metals, Except Copper and Aluminum448
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 Copper160
3353Aluminum Sheet, Plate, and Foil287
3354Aluminum Extruded Products425
3355Aluminum Rolling and Drawing, Not Elsewhere Classified232
3356Rolling, Drawing, and Extruding of Nonferrous Metals, Except Copper and Aluminum644
3357Drawing and Insulating of Nonferrous Wire643
Industry Group 336: Nonferrous Foundries (castings)
3363Aluminum Die-Castings270
3364Nonferrous Die-Castings, Except Aluminum148
3365Aluminum Foundries441
3366Copper Foundries458
3369Nonferrous Foundries, Except Aluminum and Copper311
Industry Group 339: Miscellaneous Primary Metal Products
3398Metal Heat Treating759
3399Primary Metal Products, Not Elsewhere Classified568