Novel ferritic superalloys based on the Fe-Al-Cr-Ni-X (X = Ti, Hf, Ta, and Zr) systems has been developed for the application of ultra-supercritical fossil-energy (FE) power plants under the condiction of 760 oC steam temperature and 35 MPa pressure, in order to improve the efficiency of plants and reduce the greenhouse gases emission. In the present research, the Fe (bal.)-6.5Al-10Cr-10Ni-2Hf-3.4Mo-0.25Zr-0.005B (wt.%) alloy went through an aging process, homogenized at 1,200 oC for 30 minutes, and, then, air cooled and aged at 700 oC for 100 hours. The microstructure of the alloy had been characterized by scanning-electron microscopy (SEM), transmission-electron microstropy (TEM), and neutron diffraction (ND). The results showed that after the aging process, the hierarchical coherent B2(NiAl-type)/L21(Ni2HfAl-type) precipitates appeared. The morphology of the precipitates changed from the irregular shape to either spherical shape or rectangular shape, and the size of the precipitates became larger after the aging process.