Steel Material, Automobile Component, Shearing Device, And Manufacturing Method For Steel Material

Abstract: Disclosed is a steel material in which the tensile residual stress is reduced, especially at a fracture surface of a sheared edge face. The steel material of this disclosure comprises a sheared edge face; the sheared edge face has an undercut, a fracture surface, and a burr; the fracture surface includes a first section and a second section; the first section is made up of a first crack that has propagated from the undercut side to the burr side; the second section is made up of a second crack that has propagated from the burr side to the undercut side; and the surface area proportion of the first section within the fracture surface is greater than the surface area proportion of the second section within the fracture surface.

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