https://www.zbmetaltech.com/products/aod-argon-oxygen-decarburization/ AOD ARGON OXYGEN DECARBURIZATION AOD Argon oxygen decarburization is a process primarily used in stainless steel making and other high-grade alloys with oxidizable elements such as chromium and aluminium. After initial melting the metal is then transferred to an AOD furnace vessel where it will be subjected to three steps of refining; decarburization, reduction, and desulfurization will be done.