Abstract: Provided are a ferritic stainless steel and a method for producing the ferritic stainless steel. A ferritic stainless steel of the present invention contains, in terms of % by mass, C: 0.005% to 0.05%, Si: 0.02% to 0.50%, Mn: 0.05% to 1.0%, P: 0.04% or less, S: 0.01% or less, Cr: 15.5% to 18.0%, Al: 0.001% to 0.10%, N: 0.01% to 0.06%, V: 0.01% to 0.25%, Ti: 0.001% to 0.020%, Nb: 0.001% to 0.030%, and the balance being Fe and unavoidable impurities, in which V/(Ti+Nb)?2.0 is satisfied.

Abstract: A ferrite-martensite dual-phase stainless steel has satisfactory corrosion resistance and workability for a material for the body of a freight car and excellent low-temperature toughness. The ferrite-martensite dual-phase stainless steel has a specified chemical composition, in which inequalities (I) and (II) below are satisfied, and a steel microstructure including a dual phase of a ferrite phase and a martensite phase, in which the content of the martensite phase is 5% or more and 95% or less in terms of vol. %: 10.5?Cr+1.5×Si?13.5??(I) 1.5?30×(C+N)+Ni+0.5×Mn?6.0??(II), where Cr and Si in inequality (I) above and C, N, Ni, and Mn in inequality (II) above respectively represent the contents (mass %) of the corresponding chemical elements.

Abstract: A stainless steel sheet having excellent formability which makes it possible to manufacture brake disks for automobiles by performing severe forming. The stainless steel sheet having a chemical composition comprising, by mass %, C: 0.015% or more and less than 0.100%, Si: 0.01% or more and 1.00% or less, Mn: 0.01% or more and 2.00% or less, P: 0.040% or less, S: 0.030% or less, Cr: 10.0% or more and less than 14.0%, Ni: 0.01% or more and 0.70% or less, Al: 0.001% or more and 0.200% or less, N: 0.005% or more and 0.080% or less, O: 0.0060% or less, B: 0.0002% or more and 0.0030% or less, V: (10×B content (%))% or more and 0.300% or less, and Fe and unavoidable impurities as a balance.

Abstract: The ferritic stainless steel foil has a composition containing, by mass %, C: 0.050% or less, Si: 0.20% or less, Mn: 0.20% or less, P: 0.050% or less, S: 0.0050% or less, Cr: 10.5% or more and 20.0% or less, Ni: 0.01% or more and 1.00% or less, Al: more than 1.5% and less than 3.0%, Cu: 0.01% or more and 1.00% or less, N: 0.10% or less, and further contains one or more elements selected from Ti: 0.01% or more and 1.00% or less, Zr: 0.01% or more and 0.20% or less, and Hf: 0.01% or more and 0.20% or less, and the balance being Fe and inevitable impurities. This enables a composite layer of an Al oxide layer and a Cr oxide layer to be formed on the surface of the ferritic stainless steel foil in a high-temperature oxidizing atmosphere at 800° C. or more.

Abstract: A stainless steel foil contains, in percent by mass, 0.05% or less of C, 2.0% or less of Si, 1.0% or less of Mn, 0.003% or less of S, 0.05% or less of P, 25.0% to 35.0% of Cr, 0.05% to 0.30% of Ni, 3.0% to 10.0% of Al, 0.10% or less of N, 0.02% or less of Ti, 0.02% or less of Nb, 0.02% or less of Ta, 0.005% to 0.20% of Zr, 0.02% or less of Ce, 0.03% to 0.20% of REM excluding Ce, 0.5% to 6.0% in total of at least one of Mo and W, and the balance being Fe and incidental impurities.

Abstract: Provided are an Fe—Cr—Al-based stainless steel sheet which has improved manufacturability by improving the toughness of a hot-rolled steel sheet and a cold-rolled steel sheet without deteriorating oxidation resistance at a high temperature and shape stability when used at a high temperature, and a stainless steel foil which is manufactured by rolling the stainless steel sheet. V and B are added in combination to Fe—Cr—Al-based stainless steel in amounts within specified ranges. Specifically, V content is controlled to be 0.010% or more and 0.050% or less and B content is controlled to be 0.0001% or more and 0.0050% or less, in which the relationship {V content (V %)}/{B content (B %)}>10 is satisfied.

Abstract: Provided is stainless steel foil that is suitably used for forming a catalyst carrier for an exhaust gas purifying facility, the catalyst carrier being installed in a vehicle that discharges exhaust gas having a temperature lower than the temperature of exhaust gas of a gasoline-powered automobile. The ferritic stainless steel foil contains, by mass %, C: 0.05% or less, Si: 2.0% or less, Mn: 1.0% or less, S: 0.005% or less, P: 0.05% or less, Cr: 11.0% to 25.0%, Ni: 0.05% to 0.30%, Al: 0.01% to 1.5%, Cu: 0.01% to 2.0%, N: 0.10% or less, and the balance being Fe and inevitable impurities.

Abstract: Provided are a stainless steel foil and a catalyst carrier for an exhaust gas purifying device which uses the foil. Specifically, a stainless steel foil contains, in percent by mass, 0.05% or less of C, 2.0% or less of Si, 1.0% or less of Mn, 0.003% or less of S, 0.05% or less of P, more than 15.0% and less than 25.0% of Cr, 0.30% or less of Ni, 3.0% to 10.0% of Al, 0.03% to 1.0% of Cu, 0.10% or less of N, 0.02% or less of Ti, 0.02% or less of Nb, 0.02% or less of Ta, 0.005% to 0.20% of Zr, 0.03% to 0.20% of REM excluding Ce, 0.02% or less of Ce, 2.0% to 6.0% in total of at least one of Mo and W, and the balance being Fe and incidental impurities.

Abstract: A steel sheet for a brake disc contains, on a mass percent basis, 0.02% or more and less than 0.10% C, 0.6% or less Si, more than 0.5% and 2.0% or less Mn, 0.06% or less P, 0.01% or less S, 0.05% or less Al, 11.0% to 13.5% Cr, 0.01% to 0.30% Ni, 0.10% to 0.60% Nb, 0.03% or more and less than 0.10% N, more than 0.0010% and 0.0060% or less B, and the balance being Fe and incidental impurities, and the steel sheet after quenching has a hardness of 32 HRC to 40 HRC on a Rockwell hardness scale C (HRC).

Abstract: A low Ni and high N austenitic-ferritic stainless steel is disclosed. It includes an austenitic-ferritic stainless steel having high formability and punch stretchability, crevice corrosion resistance, corrosion resistance at welded part, or excellent intergranular corrosion resistance, from a stainless steel structured by mainly austenite phase and ferrite phase, and consisting essentially of 0.2% or less C, 4% or less Si, 12% or less Mn, 0.1% or less P, 0.03% or less S, 15 to 35% Cr, 3% or less Ni, and 0.05 to 0.6% N, by mass, by adjusting the percentage of the austenite phase in a range from 10 to 85%, by volume. Furthermore, it includes an austenitic-ferritic stainless steel having higher formability by adjusting the amount of (C+N) in the austenite phase to a range from 0.16 to 2% by mass.

Abstract: A stainless steel foil contains, in percent by mass, 0.05% or less of C, 2.0% or less of Si, 1.0% or less of Mn, 0.003% or less of S, 0.05% or less of P, 25.0% to 35.0% of Cr, 0.05% to 0.30% of Ni, 3.0% to 10.0% of Al, 0.10% or less of N, 0.02% or less of Ti, 0.02% or less of Nb, 0.02% or less of Ta, 0.005% to 0.20% of Zr, 0.02% or less of Ce, 0.03% to 0.20% of REM excluding Ce, 0.5% to 6.0% in total of at least one of Mo and W, and the balance being Fe and incidental impurities.

Abstract: A steel sheet for a brake disc contains, on a mass percent basis, 0.02% or more and less than 0.10% C, 0.6% or less Si, more than 0.5% and 2.0% or less Mn, 0.06% or less P, 0.01% or less S, 0.05% or less Al, 11.0% to 13.5% Cr, 0.01% to 0.30% Ni, 0.10% to 0.60% Nb, 0.03% or more and less than 0.10% N, more than 0.0010% and 0.0060% or less B, and the balance being Fe and incidental impurities, and the steel sheet after quenching has a hardness of 32 HRC to 40 HRC on a Rockwell hardness scale C (HRC).

Abstract: A low Ni and high N austenitic-ferritic stainless steel is disclosed. It includes an austenitic-ferritic stainless steel having high formability and punch stretchability, crevice corrosion resistance, corrosion resistance at welded part, or excellent intergranular corrosion resistance, from a stainless steel structured by mainly austenite phase and ferrite phase, and consisting essentially of 0.2% or less C, 4% or less Si, 12% or less Mn, 0.1% or less P, 0.03% or less S, 15 to 35% Cr, 3% or less Ni, and 0.05 to 0.6% N, by mass, by adjusting the percentage of the austenite phase in a range from 10 to 85%, by volume. Furthermore, it includes an austenitic-ferritic stainless steel having higher formability by adjusting the amount of (C+N) in the austenite phase to a range from 0.16 to 2% by mass.

Abstract: A chromium steel sheet having excellent press formability, particularly deep-drawing formability and resistance to secondary work brittleness. The construction is a chromium steel sheet including C: not more than 0.03 wt %, Si: not more than 1.0 wt %, Mn: not more than 1.0 wt %, P: not more than 0.05 wt %, S: not more than 0.015 wt %, Al: not more than 0.10 wt %, N: not more than 0.02 wt %, Cr: 5-60 wt %, Ti: 4(C+N)-0.5 wt %, Nb: 0.003-0.020 wt %, B: 0.0002-0.005 wt %, and, if necessary, one or more selected from Mo: 0.01-5.0 wt %, Ca: 0.0005-0.01 wt % and Se: 0.0005-0.025 wt %, and the balance being Fe and inevitable impurities.

Abstract: This invention relates to a process for the production of stainless steel sheets and proposes a process for the production of stainless steel sheets having a more excellent corrosion resistance as compared with the conventional one without trimming the steel sheet surface after annealing-pickling by preventing the chapping of steel sheet surface created in the production of present stainless steel sheet, particularly stainless steel sheets having extreme-low amounts of C, S, O.For this purpose, according to the invention, a starting material of stainless steel containing C: not more than 0.01 wt %, S: not more than 0.005 wt % and O: not more than 0.005 wt % is subjected to a hot rolling at a draft below 830.degree. C. of not less than 30%, cooled at a cooling rate of not less than 25.degree. C. sec, coiled below 650.degree. C. and then annealed and pickled.