| 摘要 |
Provided is a Ni-plated steel sheet being excellent in press formability and suppression of wear of a mold and capable of maintaining alkali battery characteristic even after a lapse of time. In a Ni-plated steel sheet for a battery can having excellent press formability, an Fe-Ni diffusion layer and a Ni layer formed on the Fe-Ni diffusion layer are formed on a surface of a steel sheet corresponding to an outer surface of the battery can, a semi-bright Ni plating layer is formed on the Ni layer, a Ni coating weight of the Fe-Ni diffusion layer and the Ni layer formed on the Fe-Ni diffusion layer is set equal to or smaller than a Ni coating weight of the semi-bright Ni plating layer, the Ni coating weight of the semi-bright Ni plating layer is 2.25g/m 2 or more, surface roughness Ra1 of a surface of the semi-bright Ni plating layer in an area of 2.5jim × 2.5µm which is measured by an atomic force microscope falls within a range from 3 to 11nm, and surface roughness Ra2 measured by a traceable roughness gauge is 0.3µm or more and 2.2µm or less with respect to the surface roughness Ra of the semi-bright Ni plating layer. |
