- Seo Heung I&S co.,ltd
- Address:13, Yeouido-dong
- Posco Specialty Steel Co., Ltd
- Address:65. SHINCHON-DONG, CHANGWON-Ci
- Cobis-Teel
- Address:RN536 DIART4, 530-1 Sang-Dong
- Kumhwa Machinery Co., Ltd.
- Address:WONSHI-DONG,Wonsi-dong ,Danwon-gu, Ansan-si
- Kyongin Special Metal Co., Ltd.
- Address:717-8,Kojan-dong ,Namdong-gu, Inchon
- K-TECO
- Address:
- Ecomaister Co., Ltd.
- Address:581-1,Gajwa-dong ,Seo-gu
- Kishin Corporation
- Address:439,Nonhyeon-dong ,Namdong-gu
- MG RESOURCE CO LTD
- Address:3F. , Seokjin BLDG. , 419-5 Gangnam-gu
- Dongwon Pipe Co., Ltd.
- Address:42-6,Ihyeon-dong ,Seo-gu
- HanShang Metal Resource inc
- Address:Seoul Bldg 2F, 49-1 Samsung-dong, Kangnam-ku, Seoul , Korea
- Fine Steel Co., Ltd.
- Address:230-4,Hakjang-dong ,Sasang-gu
- CJ O Shopping
- Address:Samsung C & T Corp. Bldg. Seocho 2-Dong, Seocho-Gu
- Wonsan Steel
- Address:278-1,Yongdoek-ri ,Hallim-myeon ,Gimhae-si
- Sang Won Steel
- Address:27, Hongchun-ri, Lipjang-myun, Chonan-city
- SIIT INTERLINK
- Address:No. 509, KM-Bldg. , 690-1, Nambimin-Dong, Seo-Gu
- ERDEMiR CELiK SERViS MERKEZi SAN.VE
- Address:GOSB-Gebze Organize Sanayi Bolgesi 700 Sok.No:724 41480 Gebze KOCAELI
- KB HEAVY INDUSTRIES CO.,LTD
- Address:862-1 Osikdodong
- Yoobong Coporation
- Address:385,Sindorim-dong ,Guro-gu
- Keystone G/S/B
- Address:178-225,Gajwa-dong ,Seo-gu