The electrical resistivity which was related to the graphite structure, was measured parallel and vertical to the direction of solidification in the lamellar graphite structure of Fe-C-Si alloy unidirectionally solidified under rate of less than 1cm/hr. Since these resistivities were 50∼80μΩ·cm in both directions, there was unexpectedly no anisotropy in this specimen. This was because the graphite was arranged at random in a vertical plane to the direction of solidification. On the other hand, a rolled or forged lamellar graphite structure of the alloy was layered even in a vertical plane. The electrical resistivity in a vertical direction was about 10∼20 times as much as one in a rolled or forged direction. There was large anisotropy of electrical resistivity in this layer graphite Fe-C-Si alloy.
