Steel sheet for tension mask, manufacturing method of steel sheet for tension mask, tension mask and cathode ray tube
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United States of America Patent
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Jan 16, 2007
Grant Date -
Jan 8, 2004
app pub date -
Jul 2, 2003
filing date -
Mar 5, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A steel sheet for a tension mask excellent in the shielding properties from geomagnetism consists 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 has an anhysteretic magnetic permeability of 5,000 or higher.
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