STEEL SHEET FOR HOT PRESSING AND METHOD FOR PRODUCING SAME
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United States of America Patent
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Mar 11, 2016
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Mar 18, 2015
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A steel sheet for hot pressing which contains, in mass %, C: 0.15% or more to 0.40% or less, Si: 1.00% or more to 2.00% or less, Mn: 1.50% or more to 3.00% or less, Ti: (N×48/14)% or more to 0.10% or less, B: 0.0005% or more to 0.0050% or less, Al: more than 0% to 0.10% or less, P: more than 0% to 0.05% or less, S: more than 0% to 0.01% or less, N: more than 0% to 0.010% or less, iron and inevitable impurities. This steel sheet for hot pressing is also characterized by having a dislocation density of 10×1014/m2 or more, an area ratio of pearlite relative to the whole structure being 30% or more, and a tensile strength of 1100 MPa or less.
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