| WEWestinghouse Electric Company - Specialty Metals Plant | Blairsville | PA | Primary Metal Manufacturing331491 | 100-499 | ◐ LIKELY ACTIVE |
| ZOZelienople Operations | Zelienople | PA | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| ESEllwood Specialty Metals Company | New Castle | PA | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| JIJgx Industries LLC | Gettysburg | PA | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| MBMaster Builders & Erectors CORP | Folcroft | PA | Primary Metal Manufacturing331221 | — | ◐ LIKELY ACTIVE |
 Tmp Metals Group, LTD. | Pittsburgh | PA | Primary Metal Manufacturing331410 | — | ◐ LIKELY ACTIVE |
| ACAlaska Company INC | Bloomsburg | PA | Primary Metal Manufacturing331221 | 1-19 | ◇ UNVERIFIED |
| ACAllomet CORP | North Huntingdon | PA | Primary Metal Manufacturing331314 | 1-19 | ◇ UNVERIFIED |
| ASAll Steel Supply, INC. | Horsham | PA | Primary Metal Manufacturing331222 | 1-19 | ◇ UNVERIFIED |
| ALArc Limited | Leetsdale | PA | Primary Metal Manufacturing331529 | 1-19 | ◇ UNVERIFIED |
| ICIndependent Castings INC. | Philadelphia | PA | Primary Metal Manufacturing331524 | 1-19 | ◇ UNVERIFIED |
| LTLenape Tooling INC | Perkasie | PA | Primary Metal Manufacturing331529 | 1-19 | ◇ UNVERIFIED |
| PSPennsylvania Sintered Metals INC | Emporium | PA | Primary Metal Manufacturing331110 | 20-99 | ◇ UNVERIFIED |
| PMPhoenix Metals of Pennsylvania, INC. | Butler | PA | Primary Metal Manufacturing331410 | 1-19 | ◇ UNVERIFIED |
| PMPrenatt Manufacturing, INC. | Pleasantville | PA | Primary Metal Manufacturing331513 | 1-19 | ◇ UNVERIFIED |
| RTRolling, Tank and Fabrication Inc | Eighty Four | PA | Primary Metal Manufacturing331221 | 1-19 | ◇ UNVERIFIED |
| SCSeybert Castings, INC. | Huntingdon Valley | PA | Primary Metal Manufacturing331529 | 1-19 | ◇ UNVERIFIED |
| TSTrinity Steel INC | Braddock | PA | Primary Metal Manufacturing331111 | 20-99 | ◇ UNVERIFIED |
| TSTrinity Steel INC | rankin | PA | Primary Metal Manufacturing331221 | 20-99 | ◇ UNVERIFIED |
| TDTri-vet Design and Fabrication, LLC | Shenandoah | PA | Primary Metal Manufacturing331222 | 1-19 | ◇ UNVERIFIED |
| UEUnion Electric Akers | Avonmore | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| 7S72 Steel LLC | Aliquippa | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| AMAbington Metals Refining & Mfg INC | Philadelphia | PA | Primary Metal Manufacturing331410 | — | ◇ UNVERIFIED |
| AAditech | Leetsdale | PA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| AIAffival, INC. | Verona | PA | Primary Metal Manufacturing331112 | — | ◇ UNVERIFIED |
| AHAg Hog Pittsburgh Company, INC. | Darlington | PA | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| ACAlaska Company INC | Stroudsburg | PA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| AMAlco Metals | Bloomfield, Township of | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| ACAllegheny Cast Metals, INC. | Titusville | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| AFAllegheny Foundry | Pittsburgh | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| AFAllegheny Foundry Co/bolivar | Bolivar | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| ALAllegheny Ludlum CORP | Coatesville | PA | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| ALAllegheny Ludlum Llc/bagdad | Leechburg | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| ASAllegheny Steel Products CO. | Pittsburgh | PA | Primary Metal Manufacturing331419 | — | ◇ UNVERIFIED |
| ACAmerican Copper Products | Pottsville | PA | Primary Metal Manufacturing331422 | — | ◇ UNVERIFIED |
| AZAmerican Zinc Recycling LLC | Pittsburgh | PA | Primary Metal Manufacturing331410 | — | ◇ UNVERIFIED |
| AMAmer Metal Recycling LLC | Ellwood City | PA | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| ATAmg Titanium 315 Green Ridge Rd Fac | New Castle | PA | Primary Metal Manufacturing331410 | — | ◇ UNVERIFIED |
| APArcelormittal Plate LLC | Coatesville | PA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| AMArcelor Mittal Steel | Conshohocken | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| ARA.r.t. Research Enterprises, INC. | Lancaster | PA | Primary Metal Manufacturing331525 | — | ◇ UNVERIFIED |
| AAAti Allegheny Ludlum | Latrobe | PA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| BSB.g.b. Steel Fabricators, INC | Fairless Hills | PA | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| BMBolton Metal Prod Co/plt 1 & 4 | Bellefonte | PA | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| BWBrush Wellman INC | Shoemakersville | PA | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| CICdp Industries | Latrobe | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| CSCol-fin Specialty Steel Ii LLC | New Brighton | PA | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| CMConcast Metal Prods CO | Mars | PA | Primary Metal Manufacturing331529 | — | ◇ UNVERIFIED |
| CSConsidine Studios, Incorporated | Lansdale | PA | Primary Metal Manufacturing331529 | — | ◇ UNVERIFIED |
| CACornwall Aluminum Fndy | Lebanon | PA | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
