B2 Fe4

B2 Fe4 is an iron-based intermetallic compound with the B2 crystal structure, a semiconducting phase that exhibits ordered atomic arrangement typical of iron-rich binary systems. While primarily of research interest rather than established commercial production, B2 iron aluminides and related Fe-based intermetallics are investigated for high-temperature structural applications where conventional steels lose strength; the B2 ordering provides potential advantages in thermal stability and oxidation resistance. Engineers consider these materials for extreme-environment applications where lightweight, high-temperature performance is critical, though brittleness and processing challenges remain barriers to widespread adoption compared to conventional superalloys.