Posco

Yeong-Woo Jeon

Kyoo-Young Lee

Yon-Kyun Song

Young-Roc Im

Jae-Kon Lee

Kyong-Su Park

Jong-Seog Lee

Kanghwan Ahn

Jae-Hwa Ryu

Min Hong Seo

A high carbon steel sheet having superior strength and ductility and a method for manufacturing the same comprising: 0.2 to 1.0 wt % carbon (C), 0 to 3.0 wt % silicon (Si), 0 to 3.0 wt % manganese (Mn), 0 to 3.0 wt % chromium (Cr), 0 to 3.0 wt % nickel (Ni), 0 to 0.5 wt % molybdenum (Mo), 0 to 3.0 wt % aluminum (Al), 0 to 0.01 wt % boron (B), 0 to 0.5 wt % 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&#x2212;2.5&#xd7;C)wt %&#x2266;(Mn+Cr+Ni/2)&#x2266;8.5 wt %&#x2014;(Equation 1) Si+Al&#x3e;1.0 wt % (Equation 2).

High carbon steel sheet superior in tensile strength and elongation and method for manufacturing the same

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Pohang-si, South Korea

Yeong-Woo Jeon