Alloy sheet for shadow mask

摘要

An alloy sheet for making a shadow mask consists essentially of 34 to 38 wt. % Ni, 0.07 wt. % or less Si, 0.002 wt. % or less B, 0.002 wt. % or less O, less than 0.002 wt. % N and the balance being Fe and inevitable impurities; said alloy sheet after annealing before press-forming having 0.2% proof stress of 28 kgf/mm2 or less; and a gathering degree of {211} plane being 16% or less. A method for manufacturing an alloy sheet comprises: a finish cold-rolling step of cold-rolling the cold-rolled sheet at a cold-rolling reduction ratio in response to an average austenite grain size D ( mu m), the reduction ratio of final cold-rolling R (%) satisfying the equations below;16/=-53.8 log t+806,where T( DEG C.) is the temperature and t (min.) is the time of the annealing.