Alloy steel is alloyed with different materials to improve certain mechanical properties usable in various applications. Alloy steel pipes have properties such as hardness, toughness, wear resistance, corrosion resistance, hardenability and more. Steel pipes are commonly Alloyed with manganese, nickel, chromium, vanadium, silicon, molybdenum and boron. Other elements less alloyed with steel include cobalt, copper, cerium, titanium, tungsten, tin, cerium, zinc, led, and zirconium.
In general, all steel are alloys, but not all steels are alloy steels. Alloy Steels are only called so, when elements apart from iron and carbon are added to the mixture. Alloy Steel is used in jet engines, electric motors, transformers, spacecrafts and other exotic applications such as nuclear reactors.