| Adams Dan Steel Service Inc | 847-381-0045 | 3003 W Route 120 | Mc Henry | IL | 60050 |
| Addison Steel Incorporated | 847-328-9443 | 2225 Main St | Evanston | IL | 60202 |
| Aquarius Metal Products | 847-956-6810 | 675 Greenleaf Ave | Elk Grove Village | IL | 60007 |
| Arlington Structural Steel Company Inc | 847-577-2200 | 1727 E Davis St | Arlington Heights | IL | 60005 |
| Assured Welding Service | 847-671-1414 | 9301 Byron St | Schiller Park | IL | 60176 |
| Bridgesaver | 847-706-9230 | 830 E Higns Rd | Schaumburg | IL | 60172 |
| British Steel | 847-619-0400 | 475 N Martingale Rd | Schaumburg | IL | 60173 |
| Colfax Welding | 847-359-4433 | 605 W Colfax St | Palatine | IL | 60067 |
| Creative Steel Fabricators Inc | 847-803-2090 | 1024 North Ave | Des Plaines | IL | 60016 |
| Daido Steel Co Inc | 847-699-9066 | 2200 E Devon Ave | Des Plaines | IL | 60019 |
| Daybreak Steel & Welding Inc | 847-872-4655 | 1821 Horeb Ave | Zion | IL | 60099 |
| Deublin Co Pipe | 847-689-8600 | 2050 Norman Dr W | Waukegan | IL | 60085 |
| Exton Metal Products Inc | 847-439-7006 | 160 N Lively Blvd | Elk Grove Village | IL | 60007 |
| Genor Industries Inc | 847-671-1520 | 3315 Dora St | Franklin Park | IL | 60131 |
| Grimm Metal Fabricators | 847-439-0411 | 1425 Tonne Rd | Elk Grove Village | IL | 60007 |
| Harmony Metal Fabrication | 847-426-8900 | 148 Industrial Dr | Gilberts | IL | 60136 |
| Housecraft Products Inc | 847-394-3999 | 1414 N Rand Rd | Arlington Heights | IL | 60004 |
| J & R Sales Inc | 847-564-1155 | 490 Huehl Rd | Northbrook | IL | 60062 |
| J B Metal Works Inc | 847-824-4253 | 1325 Lee St | Des Plaines | IL | 60018 |
| Jay-Rs Steel & Welding Inc | 847-949-9353 | 840 Tower Rd | Mundelein | IL | 60060 |
| Leroys Welding & Fabricating | 847-470-1344 | 6410 Chestnut St | Morton Grove | IL | 60053 |
| Lewis Metals | 847-551-9143 | 10 E Main St | East Dundee | IL | 60118 |
| Lichtenwald-Johnson Iron Works Co | 847-966-1100 | 7840 Lehigh Ave | Morton Grove | IL | 60053 |
| Litco Inc | 847-428-3641 | 1009 Tamarac Dr | Carpentersville | IL | 60110 |
| Main Steeel Polishing Corp | 847-869-4913 | 2100 Greenwood St | Evanston | IL | 60201 |
| Manufactures Steel Services Inc | 847-697-4766 | 940 Patricia Ave | Elgin | IL | 60120 |
| Mckinney Steel & Sales Inc | 847-746-3344 | 813 29th St | Zion | IL | 60099 |
| Morton Manufacturing Company | 847-362-5400 | W 5th St At E Church St | Libertyville | IL | 60048 |
| Mutual Services Steel Div | 847-432-3815 | 2760 Skokie Valley Rd | Highland Park | IL | 60035 |
| Neuman Metalcraft Inc | 847-546-4333 | 34691 N Wilson Rd | Ingleside | IL | 60041 |
| North Chicago Iron Works Inc Steel Main Office | 847-689-2000 | 1305 Morrow Ave | North Chicago | IL | 60064 |
| Pinnacle Resourses Inc | 847-793-1000 | 430 Milwaukee Ave | Lincolnshire | IL | 60069 |
| Potter Form & Tie Co | 847-428-1931 | 38 W End Dr | Gilberts | IL | 60136 |
| Rode Welding Service Inc | 847-439-0910 | 1211 Louis Ave | Elk Grove Village | IL | 60007 |
| Rosman-Schmidt Steel Corp | 847-509-0200 | 1901 Scomerst Ln | Northbrook | IL | 60065 |
| S & G Iron Works | 847-662-5155 | 3816 Grandview Ave | Gurnee | IL | 60031 |
| S & S Welding & Fabrication Inc | 847-742-7344 | 31w377 Spaulding Rd | Elgin | IL | 60120 |
| Spencer Welding Service | 847-272-0580 | 3215 Doolittle Dr | Northbrook | IL | 60062 |
| Stann & Assoc Inc | 847-823-7711 | 105 Murphy Lake Rd | Park Ridge | IL | 60068 |
| Steel Construction Services Inc | 847-438-4320 | 21744 N Hickory Hill Rd | Lake Zurich | IL | 60047 |
| Subn Welding & Mfg Inc Experncd Workmanship Sn | 847-678-1264 | 9820 Franklin Ave | Franklin Park | IL | 60131 |
| Thrifty Welding Service | 847-872-3463 | 2173 Galilee Ave | Zion | IL | 60099 |
| Tnt Manufacturing | 847-647-0230 | 6333 W Howard St | Niles | IL | 60714 |
| Trifab Inc | 847-395-3610 | 25819 W Grass Lake Rd | Antioch | IL | 60002 |
| Triple R Steel Inc | 847-298-2930 | 285 W Old Higgins Rd | Des Plaines | IL | 60018 |
| Unified Fasteners | 847-356-2852 | 735 N Milwaukee Ave | Lake Villa | IL | 60046 |
| Vescor Corp | 847-742-7270 | 50 N River St | South Elgin | IL | 60177 |
| Wholesale Steel | 847-678-4447 | 10160 Franklin Ave | Franklin Park | IL | 60131 |
