| HZHorsehead Zinc Powders LLC | Monaca | — | ◇ UNVERIFIED |
| HPHyde Park Foundry | Hyde Park | — | ◇ UNVERIFIED |
| ICImperial Cleaners & Tailors/washington | Washington | — | ◇ UNVERIFIED |
| IMImperial Metal & Chemical CO | Philadelphia | — | ◇ UNVERIFIED |
| JSJ&l Structural Aliquippa Div | Aliquippa | — | ◇ UNVERIFIED |
| JMJohn Maneely CO Wheatland Tube Div - Mill Street | Sharon | — | ◇ UNVERIFIED |
| JSJohnstown Specialty Casting/johnstown Foundry | Johnstown | — | ◇ UNVERIFIED |
| KIKennametal Inc/colerain Twp Bedford Cast | Bedford | — | ◇ UNVERIFIED |
| KIKennametal INC - Kingston Plant | Latrobe | — | ◇ UNVERIFIED |
| KIKennametal Isa | New Castle | — | ◇ UNVERIFIED |
| KRKeystone Resources | Mars | — | ◇ UNVERIFIED |
 Koehler Bright Star/hanover Twp | Wilkes Barre | — | ◇ UNVERIFIED |
| LFLeed Foundry Inc/st Clair | Saint Clair | — | ◇ UNVERIFIED |
| LTLubrite Technologies | Meadville | — | ◇ UNVERIFIED |
| MUMarcegaglia USA | Greenville | — | ◇ UNVERIFIED |
| MRMaterials Recovery Technologies | York | — | ◇ UNVERIFIED |
| MBMetal Bank of America | Philadelphia | — | ◇ UNVERIFIED |
| MEMetalor Electrotechnics USA Corp/plt 5 | Delmont | — | ◇ UNVERIFIED |
| MRMiltec Resources Uss Edgar Thomson Works | Braddock | — | ◇ UNVERIFIED |
| MZMitsui Zinc Powder | Monaca | — | ◇ UNVERIFIED |
| NCNew Castle Foundry/new Castle | New Castle | — | ◇ UNVERIFIED |
| NMNgk Metals CORP | Reading | — | ◇ UNVERIFIED |
| NANorth American Steel & Wire INC | Butler | — | ◇ UNVERIFIED |
| OGOz Gedney Llc/shoemakersville Plt | Shoemakersville | — | ◇ UNVERIFIED |
| PCPenncast Corp/marietta | Marietta | — | ◇ UNVERIFIED |
| PSPennsylvania Steel Fndy & Machine CO | Hamburg | — | ◇ UNVERIFIED |
| PPermacast | Export | — | ◇ UNVERIFIED |
| PSPhoenix Svc LLC - Johnstown Slag Prep Facility | Johnstown | — | ◇ UNVERIFIED |
| PFPittsburgh Flatroll CO | Pittsburgh | — | ◇ UNVERIFIED |
| PCPrecision Cut Ind - 60 Ram Drive | Hanover | — | ◇ UNVERIFIED |
| PTPrecision Tube CO LLC | Lansdale | — | ◇ UNVERIFIED |
| PTPrecision Tube CO / North Wales | North Wales | — | ◇ UNVERIFIED |
| PBPrice Battery Lead Smelter | Hamburg | — | ◇ UNVERIFIED |
| QAQuaker Alloy Inc/myerstown | Myerstown | — | ◇ UNVERIFIED |
| QIQuality Investment Castings INC | Blandon | — | ◇ UNVERIFIED |
| RMReactive Metals & Alloys | West Pittsburg | — | ◇ UNVERIFIED |
| RAReal Alloy Recycling Inc/lebanon | Lebanon | — | ◇ UNVERIFIED |
| RSRecticon/allied Steel CORP. | Parker Ford | — | ◇ UNVERIFIED |
| RARegen Alum Llc/yoe | Yoe | — | ◇ UNVERIFIED |
| RPRidgway Powdered Metals | Ridgway | — | ◇ UNVERIFIED |
| RARose Acquisition Co., LLC | Reading | — | ◇ UNVERIFIED |
| SCSci Cast Intl Mfg | Bechtelsville | — | ◇ UNVERIFIED |
| SCSelect Cleaners/monongahela | Monongahela | — | ◇ UNVERIFIED |
| SCShasta Capt Haz Waste Operation | Aliquippa | — | ◇ UNVERIFIED |
| SMSilberline Mfg Co/lansford Plt | Lansford | — | ◇ UNVERIFIED |
| SSodico/shrewsbury | New Freedom | — | ◇ UNVERIFIED |
| SCSomerset Consolidate/somerset | Somerset | — | ◇ UNVERIFIED |
| SCSpring City Elec/spring City | Spring City | — | ◇ UNVERIFIED |
| SPSt Products, LLC | Altoona | — | ◇ UNVERIFIED |
| SOStructures of USA | Johnstown | — | ◇ UNVERIFIED |
