Extrusion-based metal additive manufacturing is an excellent alternative to laser-based additive manufacturing technologies like powder bed fusion (PBF) and direct energy deposition. The advantages of the proposed extrusion-based metal additive manufacturing (FDMet) over laser-based technologies are lower tooling costs for desktop systems, reduced powder handling, and straightforward mass production. In this process, composite filaments consisting of metal powder and polymer are used for 3D printing, and to get metallic parts printed, 3D printed green parts are processed to remove polymeric material through solvent and thermal debinding . The final metallic parts are achieved after sintering debound parts (borwn parts) at 1350 °. Although the FDMet process has many advantages, it also produces components with high porosity and low strength compared with LPBF and DED, mainly due to porosity. So, it is essential to reduce porosity and achieve higher strength in SS316L made by the FDMet process to have comparable properties with LPBF.  In this study, FDMet SS316L parts are subjected to Hot Isostatic Pressing (HIP) as a post-processing technique to minimize porosity while preserving their geometrical integrity. The influence of HIP on the parts’ mechanical and microstructural properties is studied by comparing the parts before and after HIP post-processing. Mechanical and microstructural characterization of the HIP and sintered parts studied using a Universal testing machine, X-ray diffraction, and a scanning electron microscope. The overall results are discussed and presented in this work.