abstract |
The objective of the present invention is to provide a steel member and a steel sheet that have high tensile strength and toughness, and also have excellent hydrogen embrittlement resistance in corrosive environments, and to provide methods for producing the same. A steel member according to the present invention is characterized by having a predetermined chemical composition, wherein the maximum Cu content at a depth range within 0-30 μm from the surface is at least 1.4 times greater than the Cu content at a depth of 200 μm from the surface. |