This article is a compilation of ternary alloy phase diagrams for which iron (Fe) is the first-named element in the ternary system. The diagrams are presented with element compositions in weight percent. The article includes 16 phase diagrams: Fe-Mn-Ni liquidus projection; Fe-Mn-Ni isothermal section at 750 °C; Fe-Mn-Ni isothermal section at 850 °C; Fe-Mn-Ni isothermal section at 650 °C; Fe-Mn-Ni isothermal section at 550 °C; Fe-Mo-Nb isothermal section at 1050 °C; Fe-Mo-Nb isothermal section at 1150 °C; Fe-Mo-Nb isothermal section at 900 °C; Fe-Mo-Ni liquidus projection; Fe-Mo-Ni isothermal section at 1100 °C; Fe-Mo-Ni isothermal section at 1200 °C; Fe-Ni-W...