HOT ROLLED STEEL SHEET FOR HOT PRESS FORMING HAVING LOW DEVIATION OF MECHANICAL PROPERTY AND EXCELLENT FORMABILITY AND CORROSION RESISTANCE HOT PRESSED PART USING THE SAME AND METHOD FOR MANUFACTURING THEREOF

摘要

A hot-rolled steel sheet for hot press forming, which has a small material variation, excellent in toughness and corrosion resistance, a hot-press formed article using the same, and a method for producing the same. An aspect of the present invention relates to a steel sheet comprising, by weight, 0.2 to 0.3% of C, 1.2 to 1.8% of Mn, 0.01 to 0.5% of Si, 0.015% or less of P, 0.004% or less of S, 0.006 to 0.02% of N, 0.0001 to 0.005% of B, less than 0.1% of Cr and not more than 0.05% of Mo and 0.060 to 1% in total of at least one selected from the group consisting of Cu and Ni Ti, and Nb, the balance being Fe and inevitable impurities, wherein the contents of N, B, Ti and Nb satisfy the following relational expression 1: A hot-rolled steel sheet for molding is provided. [Relation 1] 0.3? [(Mol% N) / {(mol% B) + (mol% Ti) + (mol% Nb)}] (Wherein the parentheses represent the weight% of the element divided by the atomic weight of the element)