Patent ID: 8353992
Filing Date: 2013-01-15
Classification: C21D,C22C,C23C,Y10T

Abstract:
1. High Young's modulus steel sheet containing, by mass %, C: 0.005 to 0.200%, Si: 2.50% or less, Mn: 0.10 to 3.00%, P: 0.150% or less, S: 0.0150% or less, Al: 0.150% or less, N: 0.0100% or less, Nb: 0.005 to 0.100%, and Ti: 0.002 to 0.150%, satisfying the formula 1, having a balance of Fe and unavoidable impurities, having a sum of an X-ray random intensity ratio of the {100}<001> orientation and an X-ray random intensity ratio of the {110}<001> orientation of 5 or less at a position of a direction from the surface of the steel sheet in the sheet thickness direction of ⅙ of the sheet thickness, and having a sum of a maximum value of the X-ray random intensity ratios of the {110}<111> to {110}<112> orientation group and a X-ray random intensity ratio of the {211}<111> orientation of 5 or more: where, Ti and N are the contents (mass %) of the elements.