• The H.L. Hunley Submarine, North Charleston, South Carolina

"In the context of naval warfare, H.L. Hunley changed the world.  Its builders’ innovative use of materials, design and manufacturing techniques resulted in the world’s first successful attack submarine."

• ATI- ALLVAC, Monroe, North Carolina

"For pioneering achievement in Vacuum Induction Melting of nickel-based superalloys in this facility September 19, 1957."

• The Liberty Bell
  Philadelphia, PA
• The Phoenix Iron & Steel Company
  Phoenixville, Pennsylvania

• Ladish Co., Inc., Cudahy Forge Division
  Cudahy, Wisconsin
• Burden Iron Works
  Troy, New York

• The Caterpillar Tractor at Haggin Museum
  Stockton, California

• Populonia - Isola D'Elba
  Tuscany, Italy

• Outokumpu Flash Smelter
  Helsinki-Espoo, Finland
• AltaSteel Ltd.
  Edmonton, Alberta, Canada

• The Ohio Crankshaft Company
  Cleveland, Ohio

• Hendrichs Forge
  Solingen, Germany
• Covington-Cincinnati Suspension Bridge
  Covington, Kentucky and Cincinnati, Ohio
• Bettis Atomic Power Laboratory
  West Mifflin, Pennsylvania

• Polymeric Materials Laboratory
  Milan, Italy
  

• LD-Vessel Number 1
  Technical Museum of Vienna
  Vienna, Austria
• Speedway Laboratories
  Praxair Surface Technologies, Inc.
  Indianapolis, Indiana
• Heroult Electric Arc Furnace for Smelting Iron
  Town of Heroult
  Shasta County, California

• Latrobe Plant
  Allvac-An Allegheny Teledyne Company
  Latrobe, Pennsylvania
• William Tod Steam Engine
  Former Youngstown Sheet & Tube Breir Hill Works
  Youngstown, Ohio
  

• 48" Grey Mill
  Bethlehem Steel Corporation
  Bethlehem, Pennsylvania
• Forge of Fontenay
  Bourgogne, France
• Freedom Forge
  Standard Steel
  Burnham, Pennsylvania
  
  

• "Little Giant" Universal Testing Machine
  Tinius Olsen Testing Machine Co., Inc.
  Willow Grove, Pennsylvania
• Metals Technology Laboratories
  CANMET
  Ottawa, Ontario, Canada
• Greenwood Furnace
  Greenwood Furnace State Park
  Greenwood Furnace, Pennsylvania

• Wayne State University
  Metallurgical Engineering Laboratory
  Detroit, Michigan
• Tannehill Ironworks
  Birmingham, Alabama
• Jeffery/Champion Spark Plug Mine
  Mono County, California
• Edgar Thomson Plant
  Braddock, Pennsylvania

• Mound Laboratory
  EG&G Applied Mound Technologies
  Miamisburg, Ohio
• Materials Science & Technology Division
  Naval Research Laboratory
  Washington, D.C.
  

• Watervliet Plant
  AL Tech Specialty Steel Corp.
  Colonie, New York
• Electric Arc Furnace
  The Museum of Science & Technology
  Milano, Italy
• Bethforge Division
  Bethlehem Steel Corporation
  Bethlehem, Pennsylvania
  

• Research Center
  Armco Inc.
  Middletown, Ohio
• AT&T Bell Laboratories
  Murray Hill, New Jersey
• Research Laboratories
  Corning Glass Works
  Corning, New York
• Watervliet Arsenal
  U.S. Army
  Watervliet, New York
  

• Mannesmann Piercing & Pilger Mills
  Mannesmannröhren-Werke AG
  Düsseldorf-Rath, Germany
• Electric Arc Furnace
  Deutsches Werkzeugmuseum
  Remsheid, Germany
• Aluminum Research Laboratories
  Aluminum Company of America
  Alcoa Center, Pennsylvania
• Clydach Refinery
  Inco
  West Glamorgan, South Wales
• Air Force Materials Laboratory
  Wright-Patterson Air Force Base
  Dayton, Ohio
  

• AC Spark Plug Division
  General Motors Corporation
  Flint, Michigan
• Research & Development Center
  Carpenter Technology Corporation
  Reading, Pennsylvania
• DSV Alvin
  Woods Hole Oceanographic Institution
  Woods Hole, Massachusetts
• The Eiffel Tower
  Paris, France
• Mill for the Production of Nickel-Base Alloys
  Inco Alloy International
  Huntington, West Virginia
• Oliver Chilled Plow Works
  South Bend, Indiana
• Ytterby Mine
  Resaro Island
  Stockholm Archipelago, Sweden

• Brownsville, Route 40 Bridge
  Brownsville, Pennsylvania
• Building 228, Experimental Station
  E.I. duPont de Nemours & Co.
  Wilmington, Delaware
• Electric Arc Furnace
  Daido Steel Company Ltd.
  Nagoya, Japan
• Ipanema Iron and Steel Works
  Sao Paulo, Brazil
• Kure Beach Marine Atmospheric Test Facility
  LaQue Center for Corrosion Technology
  Kure Beach, North Carolina
• Massena Plant
  Aluminum Company of America
  Massena, New York
• Metallurgy Division
  National Bureau of Standards
  Gaithersburg, Maryland
• Metalworking Furnaces
  Mission San Juan Capistrano
  San Juan Capistrano, California
• Michigan Copper Country
  Coppertown Museum
  Calumet, Michigan
• Building "2-0-2" Northrop Aircraft
  El Segundo, California
• Radwerk IV Blast Furnace
  Vordernberg, Austria
• Paul Revere's Copper Rolling Mill
  Plymouth Rubber Co., Inc.
  Canton, Massachusetts
• Sudbury District Ore Body
  Sudbury, Ontario, Canada
• Research Institute for Iron and Steel
  Tohoku University
  Sendai, Japan
• Zinc Distillation Furnace
  Sawarmine, India

• Maramec Iron Works
  St. James, Missouri
• Argonaut Building
  General Motors
  Research Laboratories
  Detroit, Michigan

• Forest Hills Research Laboratories Westinghouse Electric Corporation
  Forest Hills, Pennsylvania
• La Farga de Ripoll
  Ripoll, Spain
• Magnesium Production, Dow Chemical Company
  Midland, Michigan
• Metals Research Laboratories, Elkem Metals Company Technology Center
  Niagara Falls, New York
• Statue of Liberty
  New York Harbor, New York
• Sloss Furnaces
  Birmingham, Alabama

• Blaenavon Iron Works
  Blaenavon, Wales
• Col. Frishmuth's Foundry
  Philadelphia, Pennsylvania
• Elwood Haynes Museum
  Kokomo, Indiana

• The Iron Bridge
  Telford, Shropshire, England
• Hashino Blast Furnace Relics
  Kamaishi City, Iwate, Japan
• Albany Research Center, United States Bureau of Mines
  Albany, Oregon
• World's First Hot and Cold-wall Hot-Isostatic-Processing (HIP) Vessels
  Battelle Columbus Laboratories, Columbus, Ohio

• Army Materials and Mechanics Research Center
  Watertown, Massachusetts
• The Cast Aluminum Cap on the Washington Monument
  Washington, D.C.
• Reed Gold Mine
  Cararrus County, North Carolina

• Acheson Graphite Company
  Niagara Falls, New York
• New Almaden Quicksilver Mine
  New Almaden, California
• Palacio de Mineria
  Mexico City, Mexico

• Lukens Steel Corporation
  Coatesville, Pennsylvania
  

• John Winthrop Jr. Blast Furnace
  West Quincy, Massachusetts
  

• America's First Bessemer Steel Mill
  Wyandotte, Michigan
• Eads Bridge
  St. Louis, Missouri and East St. Louis, Illinois
• iscovery of First Economical Process for Electrolytic Extraction of Aluminum
  Oberlin, Ohio
• Pittsburgh Works of the Pittsburgh Reduction Company
  Pittsburgh, Pennsylvania
• Free Institute of Industrial Science
  Worcester, Massachusetts
• Saugus Iron Works
  Saugus, Massachusetts
• Experimental Breeder Reactor I
  Idaho Falls, Idaho

• Blast Furnace #1
  Fundidora Monterrey, S.A.
  Monterrey, Mexico
• Cradle of Alloy Steel
  Republic Steel Corporation
  Canton, Ohio
• First Basic Oxygen Furnaces in the Western Hemisphere
  Dofasco Melt Shop
  Hamilton, Ontario, Canada
• First HYLSA Sponge Iron Plant
  HYLSA, S.A.
  Monterrey, Mexico
• General Electric Company River Works
  Lynn, Massachusetts
• Grumman Aerospace Corporation
  Bethpage, New York
• #1 Vacuum Induction Melting Furnace
  Special Metals Corporation
  New Hartford, New York

• Atlas Steel Concast Machine
  Atlas Steels Company
  Welland, Ontario, Canada
• Les Vieilles Forges St. Maurice
  Quebec Historical Monuments Commission
  Trois-Rivieres, Quebec, Canada
• Waterbury Brass Company Mill
  City of Waterbury, Connecticut

• Location of the First Steel Converter (Kelley Steel Converter)
  Bethlehem Steel Corporation
  Johnstown, Pennsylvania
• Cornwall Iron Mine and Furnace
  Bethlehem Steel Corporation
  Cornwall, Pennsylvania
• Western Electric-Allentown Works
  American Telephone & Telegraph
  Western Electric Division
  Allentown, Pennsylvania
• All-Welded Test Boiler Drum
  Combustion Engineering, Inc.
  Metallurgical Laboratory
  Chattanooga, Tennessee
• Tredegar Iron Works
  Ethyl Corporation
  Richmond, Virginia
• Climax Mine and Mill Complex
  Climax Molybendum Company
  Division of AMAX, Inc.
  Climax, Colorado
• Tremont Nail Company
  Tremont Nail Company
  Wareham, Massachusetts
• Old New-Gate Prison and Copper Mine
  State of Connecticut HistoricalCommission
  East Granby, Connecticut
• Iron Ranges of Minnesota
  Iron Range Interpretive Center
  Chrisholm, Minnesota
• Ford Tri-Motor Airplane
  Island Airplanes
  Port Clinton, Ohio

• First Continuous Sheet Rolling Mill
  Armco Steel Corporation
  Ashland, Kentucky

• Graphite Reactor
  Oak Ridge National Laboratory
  Oak Ridge, Tennessee

• Electric Furnace
  Crucible Specialty Metals Division
  Colt Industries
  Syracuse, New York