Additive manufacturing is a manufacturing method increasingly used in industrial processes. The laser powder bed fusion (L-PBF) manufacturing process allows the construction of complex geometries and mechanical properties equivalent to traditional manufacturing processes. However, the quality of the component depends on the manufacturing parameters used to process the material. Additive manufacturing of soft magnetic materials such as silicon steels is an alternative route to strengthening the crystallographic texture. However, the presence of pores and other defects in silicon steel components is detrimental to their magnetic properties. The objective of this work is to develop and validate parameters for manufacturing silicon steel with high density for powder layer thicknesses of 30 μm and 60 μm. The 60 μm thick layer was proposed to cover a processing window that allows for higher productivity, as it reduces scanning time by using twice the standard 30 μm thickness. For the first fabrication, laser power values of 200, 300, and 400 W, scanning speed values of 400, 600, 800, and 1000 mm/s and hatch distances of 80, 100, and 120 μm were selected for each layer thickness for fabrication. For the second fabrication, a regression was performed with the results obtained to construct a response surface for each processing window in order to determine the best set of parameters for validation. Through density analyses by the Archimedes method and porosity by image, it was possible to obtain density results higher than 99.5% for the validation parameters.