Abstract: A cold-rolled steel sheet having excellent processability according to an exemplary embodiment of the present invention contains, by wt %: 0.012 to 0.060% of C, 0.03% or less (excluding 0%) of Si, 0.1 to 0.4% of Mn, 0.015 to 0.050% of Al, 0.015% or less (excluding 0%) of P, 0.015% or less (excluding 0%) of S, 0.006% or less (excluding 0%) of N, and a balance of Fe and other unavoidable impurities.

Abstract: The present invention provides a steel sheet having excellent wear resistance and composite corrosion resistance, and a method for manufacturing same. A corrosion-resistant steel sheet according to an embodiment of the present invention comprises, in wt %: 0.04 to 0.10% of carbon (C); 0.1% or less (excluding 0%) of silicon (Si); 0.20 to 0.35% of copper (Cu); 0.1% to 0.2% of nickel (Ni); 0.05 to 0.15% of antimony (Sb); 0.07 to 0.22% of tin (Sn); 0.05 to 0.15% of titanium (Ti); 0.01% or less (excluding 0%) of sulfur (S); 0.005% or less (excluding 0%) of nitrogen (N); the remainder iron (Fe); and unavoidable impurities, and satisfies formulas 1 and 2 below: [Ni]/[Cu]?0.5??[Formula 1] 48×([Ti]/48?[S]/32?[N]/14)?0.04??[Formula 2] wherein, in formulas 1 and 2, [Ni], [Cu], [Ti], [S], and [N] represent contents (wt %) of Ni, Cu, Ti, S, and N contained in the steel sheet, respectively.

Abstract: A cold-rolled sheet according to an example of the present invention comprises at most 0.004 wt % (exclusive of 0 wt %) of C, at most 0.02 wt % (exclusive of 0 wt %) of Si, 0.1 to 0.3 wt % of Mn, at most 0.05 wt % (exclusive of 0 wt %) of Al, at most 0.02 wt % (exclusive of 0 wt %) of P, at most 0.001 wt % (exclusive of 0 wt %) of S, at most 0.004 wt % (exclusive of 0 wt %) of N, 0.015 to 0.035 wt % of Ti, and 0.001 to 0.003 wt % of B, with the balance being Fe and other inevitable impurities, and has a microstructure in which the crystal grain aspect ratio defined by the following equation 1 is 1.4 to 4.0.

Abstract: An acid-resistant steel sheet according to an embodiment of the present invention includes, by wt %, equal to or less than 0.1% of C (excluding 0%) and 2.0 to 4.0% of Si, and includes a remainder of Fe and inevitable impurities, and the content of Si of the surface portion by the inward depth of up to 10 ?m from the surface of the steel sheet is equal to or greater than 15 wt %.

Abstract: A continuous self-brazing cold rolled steel sheet according to an embodiment of the present disclosure includes 0.02 wt % to 0.08 wt % of C, 0.03 wt % to 0.10 wt % of Mn, 0.10 wt % or less of Si (excluding 0 wt %), 0.005 wt % to 0.05 wt % of Al, 0.015 wt % or less of P (excluding 0 wt %), 0.01 wt % or less of S (excluding 0 wt %), 0.005 wt % or less of N (excluding 0 wt %), 0.0003 wt % to 0.0036 wt % of B, a remainder Fe, and other inevitable impurities, and satisfying Equations (1) and (2), in which an average crystal grain size is 8 ?m to 16 ?m. 0.15?([B]/10.81)/([Al]/26.98)??[Equation 1] 0.8?([B]/10.81)/([N]/14.01)?1.6??[Equation 2] (In Equations (1) and (2), [B], [Al] and [N] denote percent by weights of B, Al, and N.