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.
(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 2.0 μm, and surface roughness Ra of a surface to be an outer surface of the battery case is 0.18 μm 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.
YAMADA TERUAKI
FUJII KOJI
KOINO MICHIHIRO
