Following the accident at the Fukushima Daiichi Nuclear Power Plant in 2011, fuel debris composed of the fuel assemblies, control rods, and some other reactor materials form in the reactors. In order for the decommissioning of the plant, understanding the physical properties of fuel debris is necessary. The fuel debris consist of mainly oxide phase, boride phase, and metallic phase. Here, we focus on Fe2U and Fe2Pu which are considered as the components of the metallic phase. We use Ce instead of Pu. Ingots of Fe2U and Fe2Ce are synthesized and the thermal expansion coefficient, specific heat capacity, thermal diffusivity, thermal conductivity, sound velocity, elastic modulus, Vickers hardness, and high-temperature stability are examined. The obtained thermal and mechanical properties data including the thermal conductivity values and the Vickers hardness values are compared with the literature data for the oxide and boride phases for overall understanding the fuel debris properties.