GALVANIZED STEEL SHEET FOR HOT STAMPING AND HAVING EXCELLENT IMPACT CHARACTERISTICS, AND METHOD FOR MANUFACTURING STEEL PRODUCT HAVING DIFFERENT STRENGTHS USING SAME

摘要

According to the present invention, a galvanized steel sheet for hot stamping comprises by weight%: C: 0.05-0.17%; Si: 0.01-0.55%; Mn: 1.0-2.3%; P: 0.04% or less; S: 0.015% or less; Cr: 0.01-0.38%; Mo: 0.001-0.25%; Ti: 0.03-0.1%; Nb: 0.004-0.1%, and the remainder of Fe and inevitable impurities. A plated layer including zinc is formed on the surface of the galvanized steel sheet, and the galvanized steel sheet after hot stamping exhibits a tensile strength of 700-1200 MPa and tensile modulus of at least 12.0%.