HOT-ROLLED STEEL SHEET AND METHOD OF PRODUCING THE SAME

摘要

In this hot rolled steel sheet, the average value of the pole density of the {100} <011> to {223} <110> orientation group, which is an orientation group represented by the arithmetic average of the orientations {100} <011>, {116} <110>, {114} <110>, {112} <110> and {223} <110> in the central part in the sheet thickness direction, which is 5/8 to 3/8 of the sheet thickness from the surface of the steel sheet, is not lower than 1.0 and not higher than 6.5, the pole density of the {332} <113> crystal orientation is not lower than 1.0 and not higher than 5.0, the Lankford value (rC) in a direction perpendicular to the rolling direction is not lower than 0.70 and not higher than 1.10, and the Lankford value (r30) in a direction at an angle of 30° to the aforementioned rolling direction is not lower than 0.70 and not higher than 1.10.