Ferritic Stainless Steel For Construction Applications And Method For Producing Same

Abstract: Disclosed according to the present invention is a ferritic stainless steel, which has excellent foamability of rectangular pipes and improved structural stability due to increased strength in the event of a fire. A ferritic stainless steel for construction applications according to an embodiment of the present invention comprises, in wt%, C: 0.005 to 0.015%, N: 0.005 to 0.03%, Si: 0.4 to 0.8%, Mn: 0.7 to 1.2%, Cr: 10.5 to 14.0%, Ni: 0.2 to 1%, P: 0.04% or less, S: 0.01% or less, and the balance being Fe and inevitable impurities, and satisfies expression (1) below. Expression (1): 7 = Cr+7Si-3Mn-3Ni-50(C+N) = 14 (where Cr, Si, Mn, Ni, C, and N indicate the contents (wt%) of respective elements).

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