<p>The effect of Mn elements on the microstructures and magnetic properties of non-normalized medium-grade non-oriented silicon steel has been investigated using optical microscopy, electron backscatter diffraction, and magnetic measurement instruments. The results showed that the greater the Mn content in the hot-rolled plate specimens, the finer and more uniform the grains, where the average grain size of the annealed plate specimens also decreased with Mn content. The proportion of favorable {100} texture in the annealed specimens first increased and then decreased with Mn content. Meanwhile, the core loss of the annealed plate first decreased and then increased with Mn content, while the magnetic induction increased and then decreased with Mn content. The best magnetic properties were achieved in the specimen with 0.77% Mn content. Mn elements improved the occurrence of recrystallization in specimens during the hot-rolling and annealing processes. This caused the number of shear bands in the cold-rolled plate to first increase and then decrease, with an appropriate size and uniform grains in the specimen with 0.77% Mn, resulting in the strongest component of favorable textures and the highest {100}/{111} and ({100} + {110})/{111} texture factors.</p>