STEEL SHEET FOR TENSION MASK AND METHOD FOR PRODUCTION THEREOF, TENSION MASK, AND CATHODE RAY TUBE

摘要

A steel sheet excellent in geomagnetism shielding property, which has a chemical composition in wt %: C: less than 0.1 %, Si: less than 0.2 %, Mn: 0.4 to 2 %, P: 0.1 % or less, S: 0.03 % or less, sol. Al: 0.01 % or less, N: 0.003 to 0.02 % and balance: substantially Fe, and has a non-hysteresis magnetic permeability of 5000 or higher.