Patent ID: 7163592
Filing Date: 2007-01-16
Classification: C22C,H01J

Abstract:
1. A steel sheet for a tension mask exhibiting excellent geomagnetic shielding properties, said steel sheet consisting essentially of lower than 0.1% by weight of C, lower than 0.2% by weight of Si, 0.4 to 2% by weight of Mn, not higher than 0.1% by weight of P, not higher than 0.03% by weight of S, not higher than 0.01% by weight of sol. Al, 0.003 to 0.02% by weight of N, and the balance of Fe, and having an anhysteretic magnetic permeability of 5,000 or higher, said steel sheet having a creep elongation of 0.50% or smaller, measured when said steel is maintained at a temperature of 450° C. for 20 minutes with a tension of 300 N/mm 2 being applied to said steel sheet.