... "alloy steel" is the standard term referring to steels with other alloying elements in addition to the carbon. ... molybdenum, vanadium, silicon, and boron. Less common alloyants include aluminum, cobalt, copper, cerium, niobium, titanium, tungsten, tin, zinc, lead, ... is a range of improved properties in alloy steels (as compared to carbon steels): strength, hardness, toughness, wear resistance, ...