- ABB Metallurgy
- Aetna Standard Eng. Company
- Alcoa Engineered Products
- Bon L. Campo L.P.
- Brush Wellman Inc.
- Carpenter Technology Corporation
- Cerro Copper Tube
- Cerro Metal Products
- Crucible Specialty Metals
- CSM Industries Inc.
- Danieli Corporation
- Dow Chemical Company
- E. W. Bliss Company
- Eastco Aluminum
- Electric Material Company
- Erie Press System
- Golden Aluminum Company
- Huntington Alloys (INCO)
- Hydro Aluminum
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- Hydro-Raufoss Automotive
- Italimpianti Of America
- Jorgensen Forge Corporation
- Kobe Copper Products
- KoSa Industries
- Lone Star Steel Company
- Milwaukee Forge
- Motion Industries
- Mueller Copper Tube Products
- National Copper Products Inc.
- Newport Steel Corporation
- Olin Brass Indianapolis
- Phelps Dodge Specialty Copper Products
- Reynolds Metals Company
- SMS Engineering Inc.
- Spectrulite Consortium Inc.
- V.A.W. Of America
- William L. Bonnell Company
- Wyman-Gordon Company
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