Magnetic shielding steel sheet and method for producing the same
AssigneesNKK Corporation, Sony Corporation
InventorsReiko Sugihara, Tatsuhiko Hiratani, Hideki Matsuoka, Yasushi Tanaka, Satoshi Kodama, Kenji Tahara, Yasuyuki Takada, Ken-ichi Mitsuzuka
Life of this patent
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Abstract
A steel sheet for magnetic shields is provided containing 0.15% by weight or less of C and having a thickness of 0.05-0.5 mm and an anhysteretic magnetic permeability of 7500 or higher.
Claims28
A steel sheet for magnetic shields containing 0.005 to 0.15% by weight of C and having a thickness of 0.05 to 0.5 mm and an anhysteretic magnetic permeability of 7500 or more.
A steel sheet for magnetic shields consisting essentially of 0.005-0.025% by weight of C, less than 0.3% by weight of Si, 1.5% by weight or less of Mn, 0.05% by weight or less of P, 0.04%. by weight or less of S, 0.1% by weight or less of Sol.Al, 0.01% by weight or less of N, 0.0003-0.01% by weight of B, and the balance of Fe, wherein the thickness ranges 0.05-0.5 mm, the coercive force is less than 3.0 Oe, and an anhysteresis magnetic permeability is 8500 or higher.
Dependencies are inferred from the claim text.