in a hot-rolled Fe-21Mn-10Al-5Ni-1C (wt.%) steel. It was highlighted that thermomechanical processing (in post hot-rolled condition) may be used as a potential tool towards engineering (i) the nucleation sites and (ii) morphology of B2 phase in hot-rolled B2s Fe-Mn-Al-Ni-C steels. Besides, it was shown that elastic strain energy (at FCC/B2 interfaces) hardly influences the nucleation of B2 precipitates in presence of κ-carbide particles (in a hot-rolled Fe-21Mn-10Al-5Ni-1C (wt.%) steel) . This provides a chemical driving force for the nucleation of B2 precipitates on κ-carbide particles .