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'''Argon oxygen decarburization''' ('''AOD''') is a process primarily used in [[stainless steel]] [[steel making|making]] and other high grade alloys with oxidizable elements such as [[chromium]] and [[aluminum]]. After initial melting the metal is then transferred to an AOD vessel where it will be subjected to three steps of refining; [[decarburization]], [[Reduction (chemistry)|reduction]], and [[desulphurization]]. AOD was invented in 1954 by the Lindé Division of The Union Carbide Corporation <ref>http://www.springerlink.com/content/c6g66r71262g0158/</ref> (which became known as [[Praxair]] in 1992) <ref>http://www.unioncarbide.com/history/index.htm</ref>.
== Decarburization ==
[[File:AOD (Argon, oxygen decarburisation) vessel.jpg|thumb|Refining of a 9.5%CrMoWVNbN steel in an argon, oxygen decarburisation (AOD) vessel|240x120px]]
Prior to the decarburization step, one more step should be taken into consideration: ''de-siliconization'', which is very important factor for refractory lining and further processing.
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