Bethlehem Steel: http://www.bethsteel.com/

   Automotive Steel: http://www.autosteel.org/

   Titanium: http://www.titanium.org/

   Copper: http://www.copper.org/

   Carpenter: http://www.cartech..com/

   Refractory Metals: http://www.twca.com/

   Corrosion Doctors: http://www.http://corrosion-doctors.org