AUTOMOTIVE EXHAUST SYSTEM FERRITIC STAINLESS STEEL HAVING IMPROVED HEAT RESISTANCE AND CONDENSED WATER CORROSION RESISTANCE, AND MANUFACTURING METHOD THEREFOR

摘要

Disclosed are an automotive exhaust system ferritic stainless steel having improved heat resistance and condensed water corrosion resistance, and a manufacturing method therefor. According to one embodiment of the present invention, the ferritic stainless steel comprising: a stainless steel base metal comprising, by wt%, 0.01% or less of C, 0.5-1.0% of Si, 0.5% or less of Mn, 0.035% or less of P, 0.01% or less of S, 11-18% of Cr, 0.013% or less of N, 0.15-0.5% of Ti, 0.03%-0.5% of Sn, and the balance of Fe and other inevitable impurities; and an aluminum plated layer formed on the stainless steel base metal, comprises a plating compound comprising (Al₁₉FeMnSi₂)_5,31 (aluminum iron manganese silicide) at the interface between the stainless steel base metal and the aluminum plated layer.