Alloy ferro dividitur in duas genera: altus-ally ferro et humilis-stillam ferro. Low Alloy Steel Flanges, in alia manu, quae circa 0.05 ¨ 0,25% carbo et usque ad 2.0% manganese. Low alloy steels contain trace amounts of alloying agents such as niobium, nitrogen, vanadium, copper, nickel, chromium, titanium, calcium, molybdenum, rare earth elements or zirconium. Ut ad confirma Chromium Alloy Flanges, elementa tales ut aeris, Titanium, Vanadium et Niobium additae sunt ad sticum.