HIGH CARBON STEEL SHEET SUPERIOR IN TENSILE STRENGTH AND ELONGATION AND METHOD FOR MANUFACTURING THE SAME

摘要

The present invention relates to a high carbon steel sheet having superior strength and ductility and a method for manufacturing iihe same. A high carbon steel sheet according to one exemplary embodiment of the present invention comprises 0.2 to 1.0wt% carbon (C), 0 to 3.0wt% silicon (Si), 0 to 3,0wt% manganese (IvIn), 0 to 3,0wt% chromium (Cr), 0 to 3.0wt% nickel (Ni), 0 to 0.5wt% molybdenum (Mo), 0 to 3.0wt% aluminum (Al), 0 to 0.01wt% boron (B), 0 to 0.5wt% titanium (Ti), and the remainder substantially being iron (Fe) and inevitable impurities. The contents of carbon, manganese, chromium, and nickel satisfy the following Equation 1, and the contents of silicon and aluminum satisfy the following Equation 2: (3.0-2.5XC)wt%=(Mn+Cr+Ni/2)=8.5wt% - (Equation 1) Si+ Al > 1.0 wt% (Equation 2)