Epoxy/ powder metal composites have interesting electrical properties, becoming conductors above the percolation threshold. To complete this study, mechanical investigations have been carried out to show the influence of the fillers on the mechanical performance of these composites. In this framework, different epoxy/metallic powders (Cobalt, Chromium) composites were prepared. Scanning Electron Microscopy showed that the dispersion of the metallic fillers in the matrix is almost homogeneous. The dynamic mechanical thermal analysis (DMTA) measurements showed the dependence of the viscoelastic parameters with the frequency, temperature, nature, and content of fillers. The main relaxations observed are the primary alpha relaxation (associated to the glass transition, T-g) and a secondary beta relaxation. A second DMTA run on the same samples showed a slight increase of the T-g. It clearly showed that the used metallic fillers improve the mechanical properties of the obtained composites. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 118: 3701-3706,2010