Data from "Assessment of the compositional requirements to form Fe-Mn-C austenite-martensite composites" (revised)

P3 = Fe-3.0Mn-3.0C (at.%), Fe-3.0Mn-0.7C (wt.%)P7 = Fe-6.9Mn-3.2C (at.%) Fe-7.0Mn-0.7C (wt.%) Fig. 3a: Scanning electron microscopy micrograph P3 (pearlite condition, 600 °C/16 h)Fig. 3b: Scanning electron microscopy micrograph P7 (pearlite condition, 540 °C/96 h) Fig. 4a: Synchrotron X-ray diffraction data as intensity in 1 vs. 2Theta in ° P3 (pearlite condition, 600 °C/16 h)Fig. 4b: Synchrotron X-ray diffraction data as intensity in 1 vs. 2Theta in °P7 (pearlite condition, 540 °C/96 h) Fig. 5a: Transmission electron microscopy micrograph, bright field P3 (pearlite condition, 600 °C/16 h)Fig. 5b: Transmission electron microscopy diffraction pattern P3 (pearlite condition, 600 °C/16 h)Fig. 5c: Transmission electron microscopy micrograph, bright field P7 (pearlite condition, 540 °C/96 h)Fig. 5d: Transmission electron microscopy diffraction pattern P7 (pearlite condition, 540 °C/96 h) Fig. 6a: Atom probe tomography data as Cameca proprietary raw files P3 (pearlite condition, 600 °C/16 h)Fig. 6b: Atom probe tomography data as Cameca proprietary raw files P7 (pearlite condition, 540 °C/96 h) Fig. 8a: Scanning electron microscopy micrograph P3 (short time austenitization and quenching, 770 °C/150 s)Fig. 8b: Scanning electron microscopy micrograph P7 (short time austenitization and quenching, 770 °C/150 s) Fig. S2a: Atom probe tomography data as Cameca proprietary raw files P3 (pearlite condition, 600 °C/16 h)Fig. S2b: Atom probe tomography data as Cameca proprietary raw files P7 (pearlite condition, 540 °C/96 h) Fig. S3a to d: Concentration profiles obtained from atom probe tomography datasets as concentration in at.% vs. distance in nm, P3 (pearlite condition, 600 °C/16 h) and P7 (pearlite condition, 540 °C/96 h) This work has been supported via personal grants by the Landesgraduiertenförderung (LGF) by the local state of Baden-Württemberg (Germany) and the GRAFÖG funding by the German Academic Exchange Service (DAAD). The authors gratefully acknowledge Karlsruhe Nano Micro Facility (KNMFi) for providing advanced instruments (proposal number: ha032044). The synchrotron XRD experiments (proposal no. 2024B1779) at SPring-8 (Super Photon ring-8 GeV) were conducted with the approval of the Japan Synchrotron Radiation Research Institute (JASRI). Furthermore, the authors thank Professors Christopher Hutchinson and Sebastian Weber for valuable discussions on the contents of this article.