- 2022
- Physical division into SeAH Besteel Holdings and SeAH Besteel
- 2021
- Established SeAH Global India Private Limited in India
- Established SeAH Global Japan Co., Ltd. in Japan.
- 2020
- Acquired SeAH Aerospace & Defense (formerly Alconic Korea).
- 2019
- Established SeAH Global Vina in Vietnam
- 2018
- Established SeAH Global Thailand in Thailand
- 2017
- Acquired IATF 16949 automotive quality management system certification.
- 2016
- Established SeAH Global Inc. a US sales corporation
- 2015
- Acquired SeAH Changwon Integrated Special Steel (formerly POSCO Special Steel)
- 2013
- Completed the Changnyeong Plant
- 2012
- Started construction of the Changnyeong Plant
- 2011
- Established a system of steelmaking of 2.5 million tons (2.2 million tons of special steel and 300,000 tons of forging)
- 2010
- Completed a large forging plant (13,000 tons press, 150 tons electric furnace)
- Acquired joint KOSHA 18001/ OHSAS 18001 safety and health management system certification
- 2008
- Established a system of 2 million tons of steelmaking and 1.8 million tons of products; we were awarded the Tower of 300 Million Dollar Exports
- 2006
- Acquired ISO 14001 environmental management system certification
- 2005
- Acquired ISO/TS 16949 certification
- 2004
- Changed its name to SeAH Besteel
- 2003
- Incorporated into SeAH Besteel, we were awarded the Tower of 100 Million Dollar Exports
- 2002
- Started mass production of the Sorento line in the automotive sector
- 2001
- Recognized as an ISO/EC 17025 national calibration organization
- 2000
- Established the Research Institute Reliability Assessment Center
- 1999
- Acquired QS-9000 certification / awarded the Tower of 70 Million Dollar Exports
- 1997
- Completed comprehensive construction of Gunsan Special Steel Plant / awarded the Tower of Industrial Peace
- 1996
- Awarded the Tower of 50 Million Dollar Exports
- 1995
- Acquired ISO9002 certification. Completed a cold forging and foundry plant
- 1994
- Completed the second phase of the special steel plant
- Received the Presidential Award for Total Productive Management (TPM)
- Completed the axle assembly plant
- 1993
- Head office relocated to Gunsan / Completed the first phase of the special steel plant
- 1991
- Initial public offering / started production of die forgings
- 1990
- Changed its company name to KIA Special Steel
- 1989
- Established Metal Technology Research Institute
- 1988
- Completed hot forging plant
- 1986
- Completed axle case plant
- 1982
- Started production of special steel (Seoul Plant)
- 1981
- Completed 40-tonne electric furnace
- 1978
- Started production of castings at the Incheon Plant
- 1974
- Completed 30-tonne electric furnace and large rolling mill
- 1964
- Completed railway wheel plant
- 1958
- Completed small rolling mill
- 1955
- Established Daehan Heavy Machinery Co., Ltd.
