기아특수강(주)
(주)대양금속  
동국제강(주)
동방금속공업(주)
동부제강(주)  
동양석판(주)
동양철관(주)
동일산업(주)
동일제강(주)
만호제강(주)
미주제강(주)
비앤지스틸(주)
(주)세아제강
아이앤아이스틸(주)
연합철강공업(주)  
창원특수강(주)
(주)코스틸  
(주)포스코
포항강판(주)
한국주철관공업(주)
한국철강(주)
한보철강공업(주)
한합산업(주)
(주)휴스틸
DSR제강(주)

China Steel Corporation
An Feng Steel Group
Yusco

Siemens Energy & Automation
Thyssen Inc., N.A.(독일)
Voest-Alpine Industries, Inc.

Altos Hornos de Mexico (AHMSA)
APM, S. A. De C. V.
GRUPO IMSA, S. A. de C. V.
Hylsa mex
Prolamsa, Inc.

A.Finkl & Sons
AK Steel
Alamo Iron Works
Allied Steel Distribution Service Center
AlloyTech,Inc.
Alro Group
American Alloy Steel, Inc.
Ameristeel,Inc.
ARAMCO
Baker Refractories
Bayou Steel
Bethlehem SteelBloom Engineering Company
Butech Inc.
Chaparral Steel
Chester Engineers, Inc.
CMC Steel Group
Connecticut Steel Corporation
Consolidated Materials Brokers
Co-Steel Inc.
David J. Joseph Company
Defense Industrial Supply Center - Bulk Metals
Doublecote,L.L.C.
DublinMetal Corporation
E.J.E. Industies,Inc.
Ellwood Specialty Steel
EMJ
Energy Steel & Supply co.
Evans & Company
Farwest Steel Corporation
Federal Steel Supply
Finkl & Sons
Gantrex
Geneva Steel
Georgetown Steel
G H Cook Steel Specialist
Glazer Steel Corp.
Gulf states Steel
Havens Steel Company
Hubbell Steel Corporation
Inland Steel
Jeannette Blast Furnace Preservation
John W. Hancock, Jr., Inc.
KvaernerDavy
Laubeck corporation
Leeco steel
LTV Steel
Ludlow Steel Company
Lukens Steel
M.Taylor Steel Plc.
MACSTEEL
McKinney Steel, Inc.
McMahon Steel Supply company
Metallurgical testing Laboratory
Metalplate Galvanizing
Namasco Ltd.
North Star Steel
Nucor Corp.
Ocean International Supplier, Inc.
Ohio Steel
O'Neal Steel, Inc.
PDM Steel Service Centers
Pacesetter Steel Service Inc.
Parket Steel
Pioneer Steel crporation
Pyramid Steel Inc.
Ram Forge & Steel Inc.
Servimetal Inc.
Sheffield Steel Corporation
Southern Iron Works, Inc.
Specialty Steel & Forge
Steel Storage System, Inc.
Stripco Sales
Temtco Steel division
The Marion Steel company
The Timken Company
ThimonsIncorporated
Tippins Inc.
Transition Metals Technology
USS-Posco
US Steel
WCI Steel
Weirton Steel
Wheeling-Pittsburgh Steel

Aco Minas gerais S/A
CSN

Chuan-Ann Metal
Singapore Structural Steel Society

Ariba Steel
British Steel
Ispat International
National Association of Steel Stockholders

Metalgoi Siderurgica S.p.A.
Metal Steel
Raccortubi SRL
Sacma
Sommer S.R.L

Aichi Steel
Daido Steel(大同특수강)
Kawasaki Steel
Kobe Steel
Kubota
NSC
NKK
Sumitomo Group

Algoma Steel
Canadian Drawn Steel Co
Dofasco
Hatch Associates
Kelk
Parkdale International Ltd.
Samuel son & company Limited
Stelco Inc.
Stelwire Ltd
Syber Steel

Casttech Virtual Castings
Rautaruukki
Teraselementti Steel Contraction

Atlas Steel Australia
BHP