HIGH-PURITY FERRITIC STAINLESS STEEL SHEET WITH EXCELLENT CORROSION RESISTANCE AND ANTI-GLARE PROPERTIES

摘要

The present invention provides an alloy-saving type high purity ferritic stainless steel sheet not relying on high alloying of addition giving a large content of at least one of Cr and Mo and further not limited to a surface film by bright annealing and utilizing addition of Sn to doubly provide an anti-glare property and corrosion resistance, comprising steel sheet which contains, by mass%, C: 0.001 to 0.03%, Si: 0.01 to 1%, Mn: 0.01 to 1.5%, P: 0.005 to 0.05%, S: 0.0001 to 0.01%, Cr: 13 to 30%, N: 0.001 to 0.03%, Al: 0.005 to 1%, and Sn: 0.01 to 1% and has a balance of Fe and unavoidable impurities and which has a surface film, the surface film containing one or both of Al and Si in a total of 5 to 50 at% and Sn and an average concentration of Cr in the surface film being 1.1 to 3 times the concentration of Cr inside the steel sheet, and the surface film having a surface roughness of an arithmetic average roughness Ra of 0.1 to 1.5 µm.