Ferritic stainless steel plate for civil engineering and its manufacturing method, and civil structure using steel plate

摘要

Problem to be solved: to provide a ferritic stainless steel plate suitable for civil engineering, which is excellent in suppressing the corrosion differential corrosion.Mass%C: 0.001Si: 0.01 to 1.00%Mn: 0.01 to 0.30%P: 0.05% or lessS: 0.01% or lessAl: 0.01 to 1.00%Cr: 18.0 to 35.0%Ni: 0.01 to 2.00%And N: 0.001 to 0.030%AndTi: 0.10 to 0.50%NB: 1 or 2 selected from 0.10 to 0.50%Mo: 0.05 to 3.00%Cu: 1 or 2 selected from 0.05 to 0.80%The residue has a component composition that is Fe and inevitable impurities.The cation fraction of Cr in the surface film present on the surface isAndA ferritic stainless steel sheet for civil engineering characterized by the ratio of the cation fraction of Si to the cation fraction of Mn and the ratio of the total cation fraction of Al to 2.0.No selection