Killed Steel

Usually Killed steel is deoxidized steel; from which oxygen has been eliminated and porosity eliminated. In the de-oxidation procedure the dissolved oxygen in the molten metal is built to react with elements such as silicon, aluminium, manganese, and vanadium that are added to the melt. These elements contain an affinity for oxygen and compose metallic oxides. If aluminium is utilized, the product is called aluminium- killed steel. The term killed comes from the actuality that the steel lays quietly after being poured into the mould. The oxides in the slag. Thus fully killed steel is free of any porosity and blowholes caused by gases. The chemical & mechanical properties of killed steel are comparatively uniform throughout the ingot. However, due to metal shrinkage during solidification, an ingot of this type develops a pipe at the top. It is also known shrinkage cavity and has the appearance of a funnel-like shape. This pipe might comprise a substantial portion of the ingot and has to be eliminated.