Steel sheet for hot stamping member and method of producing same
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United States of America Patent
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Apr 11, 2017
Grant Date -
Feb 13, 2014
app pub date -
Apr 26, 2012
filing date -
Apr 27, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A steel sheet for a hot stamping member contains, as a chemical composition, 0.10 mass % to 0.35 mass % of C; 0.01 mass % to 1.0 mass % of Si; 0.3 mass % to 2.3 mass % of Mn; 0.01 mass % to 0.5 mass % of Al; limited to 0.03 mass % or less of P; limited to 0.02 mass % or less of S; limited to 0.1 mass % or less of N; and a balance consisting of Fe and unavoidable impurities, in which a standard deviation of diameters of iron carbides which are contained in a region from a surface to a ¼ thickness position of the steel sheet is less than or equal to 0.8 μm.
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