Steel sheet for seismic damper having superior toughness property and manufacturing method of same

A steel sheet for a seismic damper, comprising:

• a base steel sheet;
• and
• a scale layer formed on at least one surface of the base steel sheet,
• wherein the base steel sheet includes, by wt %, 0.005 to 0.02% of C, 0.05 to 0.2% of Si, 0.1 to 0.5% of Mn, 0.02% or less of P, 0.01% or less of S, 0.005 to 0.05% of Al, 0.005% or less of N, 0.02 to 0.06% of Nb, 48/14×[N] to 0.05% of Ti, with a balance of Fe and other unavoidable impurities,
• wherein a total content of FeO and Fe2SiO4 in the scale layer is 2 to 5%, by wt %.