To obtain an Fe-Ni series alloy sheet high in the grade of unevenness in stripes and suitable as a shadow mask for a high precision picture tube.
This Fe-Ni series alloy hot rolled sheet contains 30 to 50% Ni, ≤0.015% C, ≤0.20% Si, ≤0.5% Mn, ≤0.02% Al and ≤0.0040% B, and the pitch of the variation of the Ni concentration along the sheet thickness direction is controlled to ≤16 μm. The Fe-Ni series alloy sheet for a shadow mask is produced by casting an Fe-Ni series alloy into an ingot having a thickness T (mm), and, at the time of subjecting the same to hot rolling, annealing and cold rolling, by executing the hot rolling and cold rolling at drafts in which the total draft radio R=T/t by the hot rolling and cold rolling is controlled to ≥7,000 when the sheet thickness after the final cold rolling is defined as t (mm).
MORIKAWA HIROSHI
YAMAUCHI TAKASHI
