Fused filament fabrication (FFF) can offer an effective, simple, and economical approach for fabricating metal components when compared with powder bed fusion and conventional manufacturing processes. The FFF process employs filament, consisting of a homogenous mixture of metal and polymers-based binders. The FFF-based indirect technique uses de-binding to remove the binder, followed by the sintering process for the densification of the metal powders. In this study, H13 filament was employed as a feedstock material, which comprised 90% by weight H13 and 10% by weight of a binder system. The objective of this study is to investigate shrinkage analysis and the mechanical performance of parts fabricated through the FFF technique, utilizing various infill patterns. Thermal de-binding and sintering were performed at a temperature of 1350 ºC in an atmosphere consisting of a gas mixture of Ar/H2 (97.5/2.5). Further, the metallic parts were subsequently evaluated in terms of shrinkage, surface roughness, and mechanical performance. All printed samples show an isotropic shrinkage of about 17% after thermal de-binding and sintering. Sintering enables the removal of the binder from the green parts and, also reduces the surface roughness by 6 µm. During the compressive test, the yielding of the sample did not occur, but instead, a barreling effect was observed. The maximum stress encountered during the compressive test was 685, 575.41 MPa, and 671.5 MPa for gyroid, rectilinear, and triangular, respectively. Whereas the ultimate tensile strength of the gyroid, rectilinear, and triangular were found to be 609.48 MPa, 603.92 MPa, and 591.24 MPa, respectively. The relatively low tensile properties can be attributed to manufacturing defects present in the gauge region, specifically voids and porosity.