| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery case that can reduce a contact resistance between its inner surface and its filled positive electrode, and a Ni plated steel sheet that makes the above matter possible. SOLUTION: (1) This is a surface processing steel sheet for an alkaline primary battery case, surface roughness Ra of a surface to be an inner surface of the battery case is 0.8 to 2.0μm, and surface roughness Ra of a surface to be an outer surface of the battery case is 0.18μm or less. (2) A Ni plating steel sheet described in (1) above is performed deep drawing to be manufactured. (3) In (1) and (2) above, C:<=0.0030%, Mn:<=0.04 to 0.50%, P:<=0.030%, S:<=0.030%, solAl:<=0.010 to 0.090%, N:<=0.0050%, B:<=0.0010 to 0.0050%, other inevitable impurities, and Fe are composed.
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