| Business | Phone |
| Ameritek Heat Treating & Field 420 S 16th St, Houston 77058 | (281) 480-5637 |
| Lone Star Heat Treating Co Ltd 3939 Blaffer St, Houston 77026 | (713) 672-6616 |
| Bodycote 4201 Robertson St, Houston 77009 | (713) 691-4544 |
| Stockton Marketing Inc 6500 Sands Point Dr 815, Houston 77074 | (713) 772-5646 |
| Ajax Tocco Magnethermic Corp 1000 Fm 1960 Rd W, Houston 77090 | (281) 444-1903 |
| American Heat Treat Inc 6910 Fulton St, Houston 77022 | (713) 694-0891 |
| Bodycote 4111 Robertson St, Houston 77009 | (713) 691-4544 |
| D L Mcwilliams Co 12337 Jones Rd, Houston 77070 | (281) 970-9155 |
| Flame Metallurgical Inc 1511 Madge St, Houston 77039 | (281) 590-6601 |
| Mannings Usa 3340 Greens Rd 660, Houston 77032 | (281) 227-9722 |
| Lark Heat Treating Inc 6640 Mayard Rd, Houston 77041 | (713) 937-9089 |
| Houston Flame Hardening Co 215 N Jenkins St, Houston 77003 | (713) 926-8017 |
| K & D Heat Treat Inc 2115 1/2 Humble Westfield Rd, Houston 77073 | (281) 821-0033 |
| International Industrial Svc 5858 Westheimer Rd # 625, Houston 77057 | (713) 735-6900 |
| Jma Heat Treat Svc 6039e Thomas Rd, Houston 77041 | (713) 856-5484 |