1973.08.22 Company foundation ( merged Sunhong metal co.) ( company capitalized at 152 million won)
1974.06.13

Increased capital (40 million won)
1974.06.28

Introduction of 1 Grinder of Japan make

1977.01.31

Increased capital 12 million won
1977.04.15

Introduction of high frequency electric furnace of Japan make
1979.07.10

Acquisition of KS MARK (KSD 3698)
1979.08.09

Increased capital (76 million won)
 
1982.12.30

The first bond issue (200 million won)
1983.04.01

Revaluation of assets (revaluation excess  1,025 million won)
1983.07.26 Introduction of one 6H rolling mill of Japan make in Banwol factory
1983.08.04 Introduction of B/A 1 of Japan make in Banwol factory
1983.08.29 Purchased banwol factory (730-1)
1986.03.04 capital transfer  of revaluation reserves (994 million won)
1986.04.03 Acquisition of KS mark (KSD 3700)
1987.10.01 Introduction of 20H rolling mill and B/A 2 in Banwol factory
1988.10.07 Purchased banwol factory (730-2)
1989.11.30

26th Trade Day 500 million Export Tower Award

1989.12.01 Revaluation assets (revaluated valuation 7,268 million won)
 
1990.03.11 capital transfer of revaluation reserves (6,758 million won)
1991.05.30 Established annex research institute
1991.06.26 Increased capital (stock dividend 1,067,865 thousand won)
1991.09.30 Introduction of one 4H rolling mill in banwol factory
1991.10.09 Established OEAN METAL CORP, overseas affiliated company in the United states of America (The gross capital US$1,660,000)
1992.03.03

26th Taxation Day
Silver Tower Order of Industrial Service Merit
1992.11.30 29th Trade Day 1000 million Export Tower Award
1993.03.17 Registered stock curb market
1994.04.01 Completed ultra thin rolling mill in Banwol factory
1994.04.29 Listed on the stock exchange(number of stocks 260 million)
1995.06.29 Issued overseas convertible bonds $20,000,000
1996.02.14 Introduction each one of 12H & 20H rolling mill in Yesan factory
1997.12.31 Introduction B/A LINE in Yesan factory
1998.06.20 Increased capital (stock share 13,641,000 thousand won)
1998.12.30

Established Yesan factory in 1999.12.30
Introduction of 18 column rolling mill in Ansan factory
 
2000.11.30 37th Trade Day 5000 million Export Tower Award
2002.10.18 Acquisition of QW-9000 (ISO 9002 included)
2002.12.01 Introduction of SLITTER 1 in Yesan factory (1,250mm)
2004.07.01 Establish more 3# B/A LINE in Ansan factory
2008.06.01 Open Coil center in Southern Office
 
2012.12.30 Capital increase by issuing new stocks (dept-equity swap, capital after increase 22,949,094,000 won)
2012.12.31 Change the largest share holder from six people include Kang seok du to Standard Chartered Bank
2013.01.18 Capital increase by issuing new stocks (dept-equity swap, capital after increase 23,040,594,000won)
2013.05.07 Capital increase by issuing new stocks (dept-equity swap, capital after increase 24,096,594,000won)
2013.06.21 Change representative director from Mr.Kang Chan Ku to Mr.Kang Chan gu & Kang Seok Tae
2014.08.18 Change representative director from Mr.Kang Chan gu & Kang Seok Tae to Y. S. Song
2020.02.13 Change representative director from Y. S. Song & Mr.Jo Sang Jong
2024.11.18 Change representative director from Mr.Jo Sang Jong & Mr.Kim Jin Myung