Low-density low-carbon Fe–Al ferritic steels

Fe–Al solid-solution alloys, with interstitial-free matrix to avoid detrimental κ-carbides, have been investigated in the context of low-density steels for automotive applications. The mechanical properties of the 6.8 wt.% Al-containing alloy were found to be comparable to those of dual-phase steel but with the benefit of reduced density and better formability. Future work on these alloys should concentrate on improving the Young’s modulus and the deep drawability.