Ingot (AOD)

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What is Argon Oxygen Decarburization (AOD)?

Argon Oxygen Decarburization (AOD) is an ingot-refining process for ferrous metals such as stainless steel that improves alloy performance through tight chemistry control and high levels of metal purity.  The AOD refining process produces steel with low carbon (0.025% or less) and low silicon and sulfur levels, resulting in better weldability (reducing weld electrode use by over 50%), corrosion resistance, malleability, and heat resistance.  Customers can simply request AOD in their specifications to significantly improve alloy performance.

MetalTek has AOD capability at multiple facilities and the ability to pour over 450 alloys, including many proprietary grades.  Our argon oxygen decarburization process has been refined with years of expertise.  We control costs by capturing and reusing machine chips and can recycle raw materials with guaranteed high purity. 


MetalTek uses tight alloy control and AOD at multiple facilities to provide dozens of ferrous grades of high-integrity ingot to foundries throughout the world. MetalTek’s Sandusky International Division has AOD ingot capacities of up to 20,000 lbs. (9,072 kg) per heat and is a key supplier of chemically-certified ingot and toll melting services.

MetalTek can melt and refine the customer-supplied metal to meet strict specifications, or simply melt and return metal with a known chemistry and low carbon.

Please contact us to learn more about our argon oxygen decarburization refining process and other ingot capabilities.

Ingot Foundry