The chemical elements present in the speed steel composition are: chrome, tungsten, vanadium, and in smaller quantity cobalt, molybdenum and aluminum. The correct combination of these elements results in the high qualification of its mechanical properties, such as resistance in the high cutting temperatures, hardness, wear resistance and tenacity. A high carbon content enhances the bond strength providing higher wear resistance. The chrome content can significantly reduce oxidation avoiding mechanical or chemical tool damage. The molybdenum content makes the steel tougher avoiding tool breakage.