| Business | Phone |
| Prolamsa Usa 770 S Post Oak Ln 200, Houston 77056 | (281) 494-0900 |
| Timken Co 7600 W Tidwell Rd 110, Houston 77040 | (713) 784-2278 |
| Allvac 12247 Fm 529 Rd D, Houston 77041 | (713) 849-4042 |
| Arcelor International America 2011 W T C Jester Blvd, Houston 77008 | (713) 880-4100 |
| Ferrostaal Metals Corp 16510 Northchase Dr, Houston 77060 | (281) 999-9995 |
| Mittal Steel Usa 12777 Jones Rd, Houston 77070 | (281) 897-9359 |
| Geneva Steel Houston 77027 | (713) 622-8161 |
| Nippon Steel Usa Inc 1100 Louisiana St, Houston 77002 | (713) 652-0922 |