This paper provides a revised thermodynamic description of pure iron, focusing on the fcc, hcp, and liquid phases. The authors reassessed the magnetic properties of the solid phases using new Calphad models and theoretical calculations, resulting in a description that accurately reproduces experimental and theoretical data. Notably, they found that the often-used magnetic two-state model was not necessary to model the thermodynamic properties of fcc iron.

Two of the authors are affiliated with Sandvik Coromant R&D, and one author is affiliated with Thermo-Calc Software AB. While these affiliations could potentially represent a conflict of interest, the paper primarily focuses on fundamental thermodynamic properties and model development, and there is no direct indication that these affiliations influenced the results or conclusions.

This paper presents a revised thermodynamic description of pure iron using updated Calphad models, incorporating the latest theoretical and experimental data. The reassessment of the magnetic properties of fcc and hcp phases is a significant contribution. While the reliance on theoretical data and extrapolation beyond stable ranges introduces some uncertainty, the overall methodology and rigorous evaluation warrant a strong rating. The potential conflicts of interest have been noted, but do not appear to significantly detract from the paper's scientific merit.