| 摘要 |
PROBLEM TO BE SOLVED: To provide a steel sheet for a shadow mask having excellent geomagnetic shielding properties, and to provide its production method. SOLUTION: The steel sheet for a shadow mask having excellent geomagnetic shielding properties has a composition comprising, by mass,≤0.002% C,≤0.03% Si,≤0.04% P, 0.1 to 0.5% Mn,≤0.02% S, 0.01 to 0.08% sol.Al,≤0.01% N, and 0.001 to 0.006% V, and the balance Fe with inevitable impurities. The steel sheet has a crystal grain size of 25 to <60μm after annealing prior to press, and has a coercive force Hc of≤95 A/m and a non-hysteresis permeabilityμan of≥25,000 after annealing prior to press. COPYRIGHT: (C)2005,JPO&NCIPI
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