AK Steel

==Armco==
=== 1899–192?===
===192?–1960===
===1960–1993===
==AK Steel Holdings==
===1993–2020===
===2020===
This was short-lived, as that year, AK Steel was acquired by Cleveland-Cliffs.
Category:Steel companies
Category:Defunct
Category:Middletown, Ohio
Category:Ohio
Category:United States
Category:1890s
Category:1899