From an experimental viewpoint, SRO of constituent atoms in FCC phase has been reported to play the most crucial role in influencing the strain hardening behaviour of B2s Fe-Mn-Al-Ni-C steels ). In addition, SRO clusters largely influence plasticity (as reported elsewhere (Ref. (Gutierrez-Urrutia 2021))). Hence, understanding the influence of SRO on the deformation behaviour of the aforementioned steels is critical for controlling the microstructure evolution of B2 precipitates in FCC matrix and is presently one of the greatest challenges which needs to be addressed. B2s Fe-Mn-Al-Ni-C lightweight dual-phase contain two types of microstructural interfaces viz. homophase interfaces (such as twins and dislocation configurations) and heterophase interfaces (such as FCC/B2 interfaces). Thermal properties of microstructural interfaces is highly essential in terms of understanding interface mobility and its associated influence on the thermodynamics and kinetics of recrystallisation and grain growth. On the other hand, mechanical behaviour of microstructural interfaces is critical towards understanding the influence of plastic deformation on a number of properties such as crack nucleation and propagation, defect interaction (such as precipitate/dislocation and twin/dislocation interaction), strain partitioning, and cohesive strength of the interfaces. At present, there is a strong requirement towards understanding the influence of B2 precipitate composition and morphology on the strain hardening behaviour of B2s Fe-Mn-Al-Ni-C steels.