US-SIC Code 3321 - Gray and Ductile Iron Foundries

Industry Description

Establishments primarily engaged in manufacturing gray and ductile iron castings, including cast iron pressure and soil pipes and fittings.

Business Examples

Common types of business activities within US SIC 3321 - Gray and Ductile Iron Foundries are:

Brake shoes, railroad: cast iron
Car wheels, railroad: chilled cast iron
Castings, compacted graphite iron
Castings, gray iron and semisteel
Cooking utensils, cast iron
Couplings, pipe: pressure and soil pipecast iron
Ductile iron castings
Elbows, pipe: pressure and soil pipecast iron
Fittings, soil and pressure pipe: cast iron
Foundries, gray iron and semisteel
Gas pipe, cast iron

Gray iron foundries
Ingot molds and stools
Manhole covers, metal
Nipples, pipe: pressure and soil pipe-cast iron
Nodular iron castings
Pipe and fittings, soil and pressure: cast iron
Railroad car wheels, chilled cast iron
Rolling mill rolls, iron: not machined
Sash balances, cast iron
Sewer pipe, cast iron
Water pipe, cast iron

IBISWorld Industry Research Report

Ferrous Metal Foundry Products in the US (33151)

Revenue 2025

$20.5bn

Growth 2025

-2.68%

Key Trends

Ferrous metal prices have a significant bearing on the industry, since participants purchase, process and resell iron and steel
Industry revenue has been extremely volatile over the five years to 2022 on account of unstable metal prices and significant macroeconomic disruption
Ferrous castings are expected to increasingly experience competition from castings made of nonferrous materials or plastic in certain applications

Products and Services

View more report data

US-SIC Hierarchy 3321 - Gray and Ductile Iron Foundries

US-SIC Code 3321 - Gray and Ductile Iron Foundries sits in the 2-digit Gray and Ductile Iron Foundries sector. US SIC codes can be 2 to 8 digits and the further along the hierarchy, the more detailed and specific the category will be.

Division: D

Division Title: Manufacturing

2 Digits 3 Digits 4 Digits

20 Food and Kindred Products
- 201 Meat Products
- 202 Dairy Products
- 203 Canned, Frozen, and Preserved Fruits, Vegetables, and Food Specialties
- 204 Grain Mill Products
- 205 Bakery Products
- 206 Sugar and Confectionery Products
- 207 Fats and Oils
- 208 Beverages
- 209 Miscellaneous Food Preparations and Kindred
21 Tobacco Products
- 211 Cigarettes
  - 2111 Cigarettes
- 212 Cigars
  - 2121 Cigars
- 213 Chewing and Smoking Tobacco and Snuff
  - 2131 Chewing and Smoking Tobacco and Snuff
- 214 Tobacco Stemming and Redrying
  - 2141 Tobacco Stemming and Redrying
22 Textile Mill Products
- 221 Broadwoven Fabric Mills, Cotton
  - 2211 Broadwoven Fabric Mills, Cotton
- 222 Broadwoven Fabric Mills, Manmade Fiber and Silk
  - 2221 Broadwoven Fabric Mills, Manmade Fiber and Silk
- 223 Broadwoven Fabric Mills, Wool (including Dyeing and Finishing)
  - 2231 Broadwoven Fabric Mills, Wool (Including Dyeing and Finishing)
- 224 Narrow Fabric and Other Smallwares Mills, Cotton, Wool, Silk, and Manmade Fiber
  - 2241 Narrow Fabric and Other Smallware Mills - Cotton, Wool, Silk, and Manmade Fiber
- 225 Knitting Mills
- 226 Dyeing and Finishing Textiles, Except Wool Fabrics
- 227 Carpets and Rugs
  - 2273 Carpets and Rugs
- 228 Yarn and Thread Mills
- 229 Miscellaneous Textile Goods
23 Apparel, Finished Products from Fabrics & Similar Materials
- 231 Men's and Boys' Suits, Coats, and Overcoats
  - 2311 Men's and Boys' Suits, Coats, and Overcoats
- 232 Men's and Boys' Furnishings, Work Clothing, and Allied Garments
- 233 Women's, Misses', and Juniors' Outerwear
- 234 Women's, Misses', Children's, and Infants'
  - 2341 Women's, Misses', Children's, and Infants' Underwear and Nightwear
  - 2342 Brassieres, Girdles, and Allied Garments
- 235 Hats, Caps, and Millinery
  - 2353 Hats, Caps, and Millinery
- 236 Girls', Children's, and Infants' Outerwear
  - 2361 Girls', Children's, and Infants' Dresses, Blouses, and Shirts
  - 2369 Girls', Children's, and Infants' Outerwear, Not Elsewhere Classified
- 237 Fur Goods
  - 2371 Fur Goods
- 238 Miscellaneous Apparel and Accessories
- 239 Miscellaneous Fabricated Textile Products
24 Lumber and Wood Products, Except Furniture
- 241 Logging
  - 2411 Logging
- 242 Sawmills and Planing Mills
- 243 Millwork, Veneer, Plywood, and Structural Wood
- 244 Wood Containers
- 245 Wood Buildings and Mobile Homes
  - 2451 Mobile Homes
  - 2452 Prefabricated Wood Buildings and Components
- 249 Miscellaneous Wood Products
25 Furniture and Fixtures
- 251 Household Furniture
- 252 Office Furniture
  - 2521 Wood Office Furniture
  - 2522 Office Furniture, Except Wood
- 253 Public Building and Related Furniture
  - 2531 Public Building and Related Furniture
- 254 Partitions, Shelving, Lockers, and Office and Store Fixtures
  - 2541 Wood Office and Store Fixtures, Partitions, Shelving, and Lockers
  - 2542 Office and Store Fixtures, Partitions, Shelving, and Lockers, Except Wood
- 259 Miscellaneous Furniture and Fixtures
  - 2591 Drapery Hardware and Window Blinds and Shades
  - 2599 Furniture and Fixtures, Not Elsewhere Classified
26 Paper and Allied Products
- 261 Pulp Mills
  - 2611 Pulp Mills
- 262 Paper Mills
  - 2621 Paper Mills
- 263 Paperboard Mills
  - 2631 Paperboard Mills
- 265 Paperboard Containers and Boxes
- 267 Converted Paper and Paperboard Products, Except Containers and Boxes
27 Printing, Publishing and Allied Industries
- 271 Newspapers - Publishing, Or Publishing and Printing
  - 2711 Newspapers - Publishing, or Publishing and Printing
- 272 Periodicals - Publishing, Or Publishing and Printing
  - 2721 Periodicals - Publishing, or Publishing and Printing
- 273 Books
  - 2731 Books - Publishing, or Publishing and Printing
  - 2732 Book Printing
- 274 Miscellaneous Publishing
  - 2741 Miscellaneous Publishing
- 275 Commercial Printing
- 276 Manifold Business Forms
  - 2761 Manifold Business Forms
- 277 Greeting Cards
  - 2771 Greeting Cards
- 278 Blankbooks, Looseleaf Binders, and Bookbinding
  - 2782 Blankbooks, Looseleaf Binders and Devices
  - 2789 Bookbinding and Related Work
- 279 Service Industries for the Printing Trade
  - 2791 Typesetting
  - 2796 Platemaking and Related Services
28 Chemicals and Allied Products
- 281 Industrial Inorganic Chemicals
- 282 Plastics Materials and Synthetic Resins, Synthetic
- 283 Drugs
- 284 Soap, Detergents, and Cleaning Preparations; Perfumes, Cosmetics, and Other Toilet Preparations
- 285 Paints, Varnishes, Lacquers, Enamels, and Allied Products
  - 2851 Paints, Varnishes, Lacquers, Enamels, and Allied Products
- 286 Industrial Organic Chemicals
- 287 Agricultural Chemicals
- 289 Miscellaneous Chemical Products
29 Petroleum Refining and Related Industries
- 291 Petroleum Refining
  - 2911 Petroleum Refining
- 295 Asphalt Paving and Roofing Materials
  - 2951 Asphalt Paving Mixtures and Blocks
  - 2952 Asphalt Felts and Coatings
- 299 Miscellaneous Products of Petroleum and Coal
  - 2992 Lubricating Oils and Greases
  - 2999 Products of Petroleum and Coal, Not Elsewhere Classified
30 Rubber and Miscellaneous Plastic Products
- 301 Tires and Inner Tubes
  - 3011 Tires and Inner Tubes
- 302 Rubber and Plastics Footwear
  - 3021 Rubber and Plastics Footwear
- 305 Gaskets, Packing, and Sealing Devices and Rubber
  - 3052 Rubber and Plastics Hose and Belting
  - 3053 Gaskets, Packing, and Sealing Devices
- 306 Fabricated Rubber Products, Not Elsewhere Classified
  - 3061 Molded, Extruded, and Lathe-Cut Mechanical Rubber Goods
  - 3069 Fabricated Rubber Products, Not Elsewhere Classified
- 308 Miscellaneous Plastics Products
31 Leather and Leather Products
- 311 Leather Tanning and Finishing
  - 3111 Leather Tanning and Finishing
- 313 Boot and Shoe Cut Stock and Findings
  - 3131 Boot and Shoe Cut Stock and Findings
- 314 Footwear, Except Rubber
- 315 Leather Gloves and Mittens
  - 3151 Leather Gloves and Mittens
- 316 Luggage
  - 3161 Luggage
- 317 Handbags and Other Personal Leather Goods
  - 3171 Women's Handbags and Purses
  - 3172 Personal Leather Goods, Except Women's Handbags and Purses
- 319 Leather Goods, Not Elsewhere Classified
  - 3199 Leather Goods, Not Elsewhere Classified
32 Stone, Clay, Glass, and Concrete Products
- 321 Flat Glass
  - 3211 Flat Glass
- 322 Glass and Glassware, Pressed Or Blown
  - 3221 Glass Containers
  - 3229 Pressed and Blown Glass and Glassware, Not Elsewhere Classified
- 323 Glass Products, Made of Purchased Glass
  - 3231 Glass Products, Made of Purchased Glass
- 324 Cement, Hydraulic
  - 3241 Cement, Hydraulic
- 325 Structural Clay Products
- 326 Pottery and Related Products
- 327 Concrete, Gypsum, and Plaster Products
- 328 Cut Stone and Stone Products
  - 3281 Cut Stone and Stone Products
- 329 Abrasive, Asbestos, and Miscellaneous
33 Primary Metal Industries
- 331 Steel Works, Blast Furnaces, and Rolling and Finishing Mills
- 332 Iron and Steel Foundries
- 333 Primary Smelting and Refining of Nonferrous
- 334 Secondary Smelting and Refining of Nonferrous
  - 3341 Secondary Smelting and Refining of Nonferrous Metals
- 335 Rolling, Drawing, and Extruding of Nonferrous
- 336 Nonferrous Foundries (castings)
- 339 Miscellaneous Primary Metal Products
  - 3398 Metal Heat Treating
  - 3399 Primary Metal Products, Not Elsewhere Classified
34 Fabricated Metal Products
- 341 Metal Cans and Shipping Containers
  - 3411 Metal Cans
  - 3412 Metal Shipping Barrels, Drums, Kegs, and Pails
- 342 Cutlery, Handtools, and General Hardware
- 343 Heating Equipment, Except Electric And Warm Air; And Plumbing Fixtures
- 344 Fabricated Structural Metal Products
- 345 Screw Machine Products, and Bolts, Nuts, Screws, Rivets, and Washers
  - 3451 Screw Machine Products
  - 3452 Bolts, Nuts, Screws, Rivets, and Washers
- 346 Metal Forgings and Stampings
- 347 Coating, Engraving, and Allied Services
  - 3471 Electroplating, Plating, Polishing, Anodizing, and Coloring
  - 3479 Coating, Engraving, and Allied Services, Not Elsewhere Classified
- 348 Ordnance and Accessories, Except Vehicles and Guided Missiles
- 349 Miscellaneous Fabricated Metal Products
35 Industrial and Commercial Machinery and Computer Equipment
- 351 Engines and Turbines
  - 3511 Steam, Gas, and Hydraulic Turbines, and Turbine Generator Set Units
  - 3519 Internal Combustion Engines, Not Elsewhere Classified
- 352 Farm and Garden Machinery and Equipment
  - 3523 Farm Machinery and Equipment
  - 3524 Lawn and Garden Tractors and Home Lawn and Garden Equipment
- 353 Construction, Mining, and Materials Handling
- 354 Metalworking Machinery and Equipment
- 355 Special Industry Machinery, Except Metalworking
- 356 General Industrial Machinery and Equipment
- 357 Computer and Office Equipment
- 358 Refrigeration and Service Industry Machinery
- 359 Miscellaneous Industrial and Commercial
36 Electronic & Other Electrical Equipment & Components
- 361 Electric Transmission and Distribution Equipment
  - 3612 Power, Distribution, and Specialty Transformers
  - 3613 Switchgear and Switchboard Apparatus
- 362 Electrical Industrial Apparatus
- 363 Household Appliances
- 364 Electric Lighting and Wiring Equipment
- 365 Household Audio And Video Equipment, And Audio Recordings
  - 3651 Household Audio and Video Equipment
  - 3652 Phonograph Records and Prerecorded Audio Tapes and Disks
- 366 Communications Equipment
- 367 Electronic Components and Accessories
- 369 Miscellaneous Electrical Machinery, Equipment, and Supplies
37 Transportation Equipment
- 371 Motor Vehicles and Motor Vehicle Equipment
- 372 Aircraft and Parts
- 373 Ship and Boat Building and Repairing
  - 3731 Ship Building and Repairing
  - 3732 Boat Building and Repairing
- 374 Railroad Equipment
  - 3743 Railroad Equipment
- 375 Motorcycles, Bicycles, and Parts
  - 3751 Motorcycles, Bicycles, and Parts
- 376 Guided Missiles and Space Vehicles and Parts
- 379 Miscellaneous Transportation Equipment
38 Measuring, Photographic, Medical, & Optical Goods, & Clocks
- 381 Search, Detection, Navigation, Guidance, Aeronautical, and Nautical Systems, Instruments, and Equipment
  - 3812 Search, Detection, Navigation, Guidance, Aeronautical, and Nautical Systems and Instruments
- 382 Laboratory Apparatus and Analytical, Optical, Measuring, and Controlling Instruments
- 384 Surgical, Medical, and Dental Instruments and Supplies
- 385 Ophthalmic Goods
  - 3851 Ophthalmic Goods
- 386 Photographic Equipment and Supplies
  - 3861 Photographic Equipment and Supplies
- 387 Watches, Clocks, Clockwork Operated Devices, and Parts
  - 3873 Watches, Clocks, Clockwork Operated Devices, and Parts
39 Miscellaneous Manufacturing Industries
- 391 Jewelry, Silverware, and Plated Ware
- 393 Musical Instruments
  - 3931 Musical Instruments
- 394 Dolls, Toys, Games and Sporting and Athletic
- 395 Pens, Pencils, and Other Artists Materials
- 396 Costume Jewelry, Costume Novelties, Buttons, And Miscellaneous Notions, Except Precious Metal
  - 3961 Costume Jewelry and Costume Novelties, Except Precious Metal
  - 3965 Fasteners, Buttons, Needles, and Pins
- 399 Miscellaneous Manufacturing Industries

Extended US-SIC Hierarchy for 3321 - Gray and Ductile Iron Foundries

For business marketing and targeting, US SIC Codes have been extended to provide more specific classifications within US-SIC 3321 - Gray and Ductile Iron Foundries. Extended US SIC Codes are being continuously updated to reflect the current business environment.

6 Digit SIC Codes

332101 Foundries-iron
332102 Foundries-gray iron
332103 Manhole covers (manufacturers)
332104 Foundries-ductile iron
332105 Sash balances & weights (manufacturers)
332106 Castings-iron (manufacturers)
332107 Foundries-nickel & alloys
332108 Sewer pipe-retail
332198 Gray & ductile iron foundries

8 Digit SIC Codes

33210000 Gray and ductile iron foundries
33210100 Cast iron pipe and fittings
33210101 Pressure pipe and fittings, cast iron
33210102 Sewer pipe, cast iron
33210103 Soil pipe and fittings: cast iron
33210104 Water pipe, cast iron
33219900 Gray and ductile iron foundries, nec
33219901 Cooking utensils, cast iron
33219902 Ductile iron castings
33219903 Gray iron castings, nec
33219904 Gray iron ingot molds, cast
33219905 Manhole covers, metal
33219906 Railroad car wheels and brake shoes, cast iron
33219907 Rolling mill rolls, cast iron

Can't find the US SIC Code you are looking for? Full US SIC Code Directory

Industry Research for Hundreds of US SIC Codes

Our analysts spend hours poring over statistics and trends so you don’t have to.

Learn More

US SIC Code Directory

Each US SIC Code is part of a Division, which corresponds with a numerical range. Select a Division category from the table below, then drill down to discover the industries within that Division.

Division	US-SIC Code	Sector title
A	01-09	Agriculture, Forestry, and Fishing
B	10-14	Mining
C	15-17	Construction
D	20-39	Manufacturing
E	40-49	Transportation, Communications, Electric, Gas, and Sanitary Services
F	50-51	Wholesale Trade
G	52-59	Retail Trade
H	60-67	Finance, Insurance, and Real Estate
I	70-89	Services
J	90-99	Public Administration

US Standard Industrial Classification (SIC) Code Lookup