Volume 11 of group IV presents phase diagrams, crystallographic and thermodynamic data of ternary alloy systems. The subvolume D deals with iron systems, with part 1 considering selected systems from Al-B-Fe to C-Co-Fe. The volume forms a comprehensive review and rigorous systematization of the presently available data. For each system the often conflicting literature and information has been thoroughly evaluated by a team of experts and is presented in a standard format.