Carbon Steels

Carbon Steels
Points : Carbon Steels, Rimmed Steels, Killed Steels, Semi-killed Steel Definition Carbon steels contain less than 1 percent carbon and small amounts of silicon, manganese, phosphorus, sulfur, and copper. Other element are present in carbon steel but only in residual quantities.
Carbon steel can be classified according to the amount of deoxidization that is performed during the production of the steel. The classifications are: Rimmed Steels Rimmed Steels has only a small amount of oxygen removed during the solidification process leaving an outer layer, or rim, relatively free of carbon than the exterior of the ingot. This extremely low-carbon surface is very ductile, has excellent surface qualities and cold forming characteristics. Killed Steels Killed Steels are the opposite of rimmed steels; they have had extreme amounts of oxygen removed, resulting in a relatively carbon-free steel. Killed steels are useful when severe forming techniques are required, but they always require heat treatment when the manufacturing forming technique is completed. Semi-killed Steel Semi-killed Steel have composition and mechanical properties which lie between the rimmed and killed steels. Capped steels combine the characteristics of the rimmed and semi-killed steels; that is, the carbon rim is formed at the surface of the steel, while the bulk of the interior cross section of the steel has the characteristics of semi-killed steel.