STEEL SHEET FOR HIGH STRENGTH HEAT SHRINK BAND FOR CATHODE-RAY TUBE AND HIGH STRENGTH HEAT SHRINK BAND

摘要

A steel sheet for a heat shrink band for a cathode-ray tube which comprises 0.001 to 0.05 mass % of C, 0.2 to 1 mass % of Si, 0.5 to 2.3 mass % of Mn, 0.02 to 0.12 mass % of P, 0.005 mass % or less of O, 0.020 mass % or less of S, 0.005 mass % or less of N, and exhibits a segregation percentage of P in the steel sheet represented by (Pmax - Pave) X 100/Pave of 100 % or less, wherein Pmax and Pave represent the maximum concentration and an average concentration of P in the steel sheet, respectively, an average ferrite grain diameter of 10 to 25 μm and a non-hysteresis permeability of 10,000 or more.