👉 Martensteinite is a type of supercritical, highly ductile iron. It has a very low density and is extremely brittle. The structure of martensitic steel is typically composed of two phases: a matrix (which is mainly ferrite) and a martensite (which is a lattice-like structure with an increased density). Martensite is often used as a substitute for austenitic steels due to its high strength-to-diameter ratio.
