1959.07 : Established as DONG-IL STEEL CO, LTD.

(Guro-Dong, Guro-Gu, Seoul)

1970.11 : Obtained K.S certification

(PC steel wire and PC strand)

1974.03 : Obtained K.Scertification (Hard Drawn Steel wire)

1982.11 : Awarded industrial prize on the Day of Export

1983.02 : Obtained K.S certification

(Galvanized steel wire, PC Hard Drawn Steel wire)

1983.11 : Awarded Coal Industry Medal

1989.04 : Obtained K.Scertification

(CD Bar, Plano wire)

1994.07 : Obtained JIS certification

(Hard Drawn Steel wire, PC steel wire and PC strand)

1995.09 : Acquired ISO 9002

(Netherlands recognition agency, DNV)

1997.01 : Relocated to a new factory in Anseong

(Miyang-Myeon, Anseong-Si, Gyeonggi-Do)

1999.02 : Increased capital (20 billion won)

2003.10 : ISO 9001 (D.N.V)-Certified

2006.04 : Obtained Kmark certification (Norway) - PC strand

2009.09 : Registered as an approved company of Doosan Heavy Industry

(Nuclear energy PC STRAND for CPTS and Tendon production)

2009.09 : Obtained new JIS certification

PC steel wire and PC strand - JIS G 3536

2010.09 : Built PE coating line

2011.08 : Built additional annealing heat treatment

2011.08 : Built additional D/B (Draw Bench) line

2014.06 : Cold drawn steel line expansion in Pohang Factory

2015.09 : Listed on KOSPI

2015.12 : Aluminum Bar Facility Constructed (Factory 1)

2018.03 : IATF16949 : 2016 Certified

2020.09 : Holding Furnace, Peeling Machine Added

2022.04 : Aluminum Bar Factory 2 Expansion (Scheduled)