This paper presents a different method for simultaneously estimating the thermal conductivity and the volumetric heat capacity of metallic samples. The contribution of this work consists in how it obtains the optimal conditions to produce such estimates. This method uses different intensities of heat flux in the same experiment, all in accordance with the analyses of the sensitivity coefficients. These analyses were performed along with an objective function to find both the best points to be analyzed and the best experimental configuration for estimating these properties. The method consists in positioning a uniform heat flux on the top surface and insulation on the bottom surface where a thermocouple is placed. The thermal properties were obtained by solving the heat diffusion equation for the one-dimensional model. The estimated values of the thermal properties for all materials present a difference lower than 2%, and an uncertainty analysis presented a result lower than 4% for all materials.