Many steel applications require increased corrosion resistance. To achieve this result, aluminum, silicon, and chromium are alloyed. They form a protective oxide layer on the surface of the steel, thereby protecting the metal from further deterioration in certain environments.Click to see full answer. Keeping this in consideration, why alloying elements are added to steel?Alloying Elements in Stainless Steel. Chromium (Cr): Chromium is added to steel to increase resistance to oxidation. This resistance increases as more chromium is added. ‘Stainless Steels have a minimum of 10.5% Chromium (traditionally 11 or 12%).Subsequently, question is, what are steel alloys used for? Alloy Steel These alloying elements can include manganese, chromium, vanadium, nickel, and tungsten. The addition of alloying elements increases overall machinability and corrosion resistance. Alloy steel is most commonly used to manufacture pipes, especially pipes for energy-related applications. Regarding this, what is added to steel? While iron alloyed with carbon is called carbon steel, alloy steel is steel to which other alloying elements have been intentionally added to modify the characteristics of steel. Common alloying elements include: manganese, nickel, chromium, molybdenum, boron, titanium, vanadium, tungsten, cobalt, and niobium.Why is cobalt added to steel?Cobalt is added to high speed steels to improve hot hardness. However, their increasing popularity is due to their excellent red hardness property. The addition of Co to cold work die steels (as in steels with 3 % Co) increases hardness and promotes greater wear resistance than grades where it is not used.