Some properties, including the microhardness, H(V), and electrical resistivity of a nanocrystalline, two coarse-grained polycrystalline and one amorphous alloys of Fe-Mo-Si-B of the same composition, were measured experimentally and compared. The structures of amorphous, nanocrystalline and coarse-grained Fe-Mo-Si-B alloys are also compared and discussed.