High Young rate steel plate, hot dip galvanized steel sheet, galvanized hot-dip galvanized steel sheet, high Young's modulus steel pipe, high Young rate galvanized steel pipe, and high Young's modulus galvanized steel tube, and its manufacturing method

摘要

PROBLEM TO BE SOLVED: To provide a high young's modulus steel plate, to provide a hot dip galvanized steel sheet using the same, to provide a hot dip galvannealed steel sheet, to provide a high young's modulus steel pipe, to provide a high young's modulus hot dip galvanized steel pipe, to provide a high young's modulus hot dip galvannealed steel pipe, and to provide a method for production thereof.;SOLUTION: An embodiment of a high Young's modulus steel sheet, wherein it has a chemical composition comprising, by mass, C: 0.0005 to 0.30%, Si: 2.5% or less, Mn: 0.1 to 5.0%, P: 0.15% or less, S: 0.015% or less, Al: 0.15% or less, N: 0.01% or less, and further comprises 0.015 to 1.91% by mass in total of one or more of Mo: 0.005 to 1.5%, Nb: 0.005 to 0.20%, B: 0.0001 to 0.01%, and Ti: 48/14N (mass%) to 0.2%, and wherein {110}223 and/or {110}111 in a layer at 1/8 of the thickness of the sheet have a pole density of 10 or more and a Young's modulus in the rolling direction of more than 230 GPa.;COPYRIGHT: (C)2007,JPO&INPIT