| IHInduction Heat Treating Waukesha Corp. | Waukesha | WI | Fabricated Metal Product Manufacturing332811 | 1-19 | ◐ LIKELY ACTIVE |
| IHIndustrial Heat Treat LLC | Salt Lake City | UT | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| INInland NW Metallurgical | Spokane Valley | WA | Fabricated Metal Product Manufacturing332811 | 1-19 | ◐ LIKELY ACTIVE |
| JHJ.W. Harris Co., Inc. - Carthage | Carthage | TN | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| MIMetal Improvement Company- Lynwood | Lynwood | CA | Fabricated Metal Product Manufacturing332811 | 1-19 | ◐ LIKELY ACTIVE |
| MHMillbury Heat Treat Plant | Millbury | MA | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| MMpc | Warren | MI | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| NPNational Peening, INC. | Statesville | NC | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| NMNitrex MI Operations | Mason | MI | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| NDNorman D Hubele | Chandler | AZ | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| OSO'Brien Steel Service- CHT | Peoria | IL | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| PHPaulo - Headquarters | Saint Louis | MO | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| PHPaulo - Headquarters | St. Louis | MO | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| PFPenna Flame Industries | Zelienople | PA | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
Peters' Heat Treating, Inc. McKean | Mckean | PA | Fabricated Metal Product Manufacturing332811 | 1-19 | ◐ LIKELY ACTIVE |
| PHP&L Heat Treating | P&L Heat Treating | OH | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| PHP&L Heat Treating and Grinding, Inc | Youngstown | OH | Fabricated Metal Product Manufacturing332811 | 1-19 | ◐ LIKELY ACTIVE |
| PHPrecision Heat Treating Corporation | Fort Wayne | IN | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| PTPressure Technology INC | Warminster | PA | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| RARenk American Marine & Industrial LLC1 | Milford | OH | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| RTRyerson - Therm-Tech of Waukesha, Inc. | New Berlin | WI | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| SMScientific Metal Treating CO. | Roselle | IL | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| SLSmg LLC | Seattle | WA | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| SASolar Atmospheres of Western PA | Hermitage | PA | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
Specialty Steel Treating - CT | East Granby | CT | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
Specialty Steel Treating - Farmington Hills | Farmington Hills | MI | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
Specialty Steel Treating - Malyn | Fraser | MI | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| SSuperheat | New Lenox | IL | Fabricated Metal Product Manufacturing332811 | 100-499 | ◐ LIKELY ACTIVE |
| SMSuperior Metals | Indianapolis | IN | Fabricated Metal Product Manufacturing332811 | 100-499 | ◐ LIKELY ACTIVE |
| SKSwagelok Kenmore | Ravenna | OH | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| TTTejas Tubular Product- Corporate | Houston | TX | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| TTTejas Tubular Products Casing | Houston | TX | Fabricated Metal Product Manufacturing332811 | 100-499 | ◐ LIKELY ACTIVE |
| TTTejas Tubular Products Stephenville works | Stephenville | TX | Fabricated Metal Product Manufacturing332811 | 100-499 | ◐ LIKELY ACTIVE |
| TTTejas Tubular Products - Tubing | Houston | TX | Fabricated Metal Product Manufacturing332811 | 100-499 | ◐ LIKELY ACTIVE |
| TTes | Dover | NH | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| THTexas Heat Treating FW, Inc. | Fort Worth | TX | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| TMThermal Modification Technologies, Inc. | Tualatin | OR | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| UHUSA Heat Treating, Inc. | Cleveland | OH | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| WCWall Colmonoy - Aerobraze Engineered Technologies | Cincinnati | OH | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| WIWolfmind Industries LLC | Fort Worth | TX | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| WWwh | Homer | MI | Fabricated Metal Product Manufacturing332811 | 100-499 | ◐ LIKELY ACTIVE |
| WWwp | Pontiac | MI | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| ZIZion Industries - Grand Ledge | Grand Ledge | MI | Fabricated Metal Product Manufacturing332811 | 1-19 | ◐ LIKELY ACTIVE |
| ZIZion Industries - Hildebran | Hildebran | NC | Fabricated Metal Product Manufacturing332811 | 1-19 | ◐ LIKELY ACTIVE |
| ZIZion Industries - Valley City | Valley City | OH | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |