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 Mills2,416
3313Electrometallurgical Products, Except Steel64
3315Steel Wiredrawing and Steel Nails and Spikes732
3316Cold-Rolled Steel Sheet, Strip, and Bars143
3317Steel Pipe and Tubes572
Industry Group 332: Iron And Steel Foundries
3321Gray and Ductile Iron Foundries445
3322Malleable Iron Foundries30
3324Steel Investment Foundries230
3325Steel Foundries, Not Elsewhere Classified303
Industry Group 333: Primary Smelting And Refining Of Nonferrous Metals
3331Primary Smelting and Refining of Copper31
3334Primary Production of Aluminum182
3339Primary Smelting and Refining of Nonferrous Metals, Except Copper and Aluminum461
Industry Group 334: Secondary Smelting And Refining Of Nonferrous Metals
3341Secondary Smelting and Refining of Nonferrous Metals306
Industry Group 335: Rolling, Drawing, And Extruding Of Nonferrous Metals
3351Rolling, Drawing, and Extruding Of Copper164
3353Aluminum Sheet, Plate, and Foil241
3354Aluminum Extruded Products380
3355Aluminum Rolling and Drawing, Not Elsewhere Classified211
3356Rolling, Drawing, and Extruding of Nonferrous Metals, Except Copper and Aluminum661
3357Drawing and Insulating of Nonferrous Wire593
Industry Group 336: Nonferrous Foundries (castings)
3363Aluminum Die-Castings253
3364Nonferrous Die-Castings, Except Aluminum168
3365Aluminum Foundries457
3366Copper Foundries416
3369Nonferrous Foundries, Except Aluminum and Copper334
Industry Group 339: Miscellaneous Primary Metal Products
3398Metal Heat Treating740
3399Primary Metal Products, Not Elsewhere Classified613