Steel are the most used alloy in the world and in any industry the most required one hence it must have special properties like hardness, toughness, tensile strength, yield strength, elongation, corrosion resistant and many more but it need more advancement. Nanotechnology can help. it can be used for making alloys like steel nanotechnology can help design steel at nanoscale and it can be customised by the region it is going to be used. Nanotechnology has been employed to enhance the mechanical properties of the steel bulk itself, by achieving the desirable finely crystalline micro- structure of steel or by modifying its chemical composition or morphology at the nano- or micro-scale. However steel still have weaknesses like buckling, fatigue and
also There are extensive fireproofing costs involved, as steel is not fireproof. In high temperatures, steel loses its properties but it will eliminate by advancement in iron and steel industry.