1.JFE Steel Corporation
2.Jindal SAW Ltd.
3.Arcelor Mittal S.A
4.MRC Global
5.National oil well Varco Inc.
6.Nippon Steel & Sumitomo Metal Corporation
7.Tenaris SA
8.Tmk Ipsco Enterprise Inc.
9.Vallourec
10.U.S. Steel Tubular Products Inc.