Abstract: The disclosure is to provide a martensitic stainless steel excellent in strength, workability and corrosion resistance. The martensitic stainless steel comprises a chemical composition containing, in mass %: C: 0.020% or more and less than 0.10%, Si: 0.01% or more and 2.0% or less, Mn: 0.01% or more and 3.0% or less, P: 0.050% or less, S: 0.050% or less, Cr: 10.0% or more and 16.0% or less, Ni: 0.01% or more and 0.80% or less, Al: 0.001% or more and 0.50% or less, and N: more than 0.050% and 0.20% or less, satisfying N % C %, and the balance containing Fe and incidental impurities, where C % and N % indicate respectively the contents of C and N (mass %) in the steel.

Abstract: The disclosure is to provide a martensitic stainless steel excellent in strength, workability and corrosion resistance. The martensitic stainless steel comprises a chemical composition containing, in mass %: C: 0.020% or more and less than 0.10%, Si: 0.01% or more and 2.0% or less, Mn: 0.01% or more and 3.0% or less, P: 0.050% or less, S: 0.050% or less, Cr: 10.0% or more and 16.0% or less, Ni: 0.01% or more and 0.80% or less, Al: 0.001% or more and 0.50% or less, and N: more than 0.050% and 0.20% or less, satisfying N %?C %, and the balance containing Fe and incidental impurities, where C % and N % indicate respectively the contents of C and N (mass %) in the steel.

Abstract: A ferritic stainless steel is provided having a chemical composition consisting of, by mass %, C: 0.003% or more and 0.015% or less, Si: 0.05% or more and 0.30% or less, Mn: 0.10% or more and 0.35% or less, P: 0.06% or less, S: 0.02% or less, Cr: 17.0% or more and 19.0% or less, Ni: more than 0.10% and 0.30% or less, Ti: 0.10% or more and 0.40% or less, Nb: 0.005% or more and less than 0.050%, Mo: less than 0.20%, N: 0.005% or more and 0.015% or less, Cu: 0.30% or more and 0.50% or less, Mg: less than 0.0005% and the balance being Fe and inevitable impurities.

Abstract: The ferritic stainless steel has a chemical composition containing, by mass %, C: 0.003% or more and 0.012% or less, Si: 0.30% or more and 0.60% or less, Mn: 0.10% or more and 0.35% or less, P: 0.040% or less, S: 0.020% or less, Cr: 17.0% or more and 19.0% or less, Ni: more than 0.10% and 0.30% or less, Ti: 0.10% or more and 0.40% or less, Nb: 0.005% or more and less than 0.050%, Mo: 0.20% or less, N: 0.005% or more and 0.015% or less, Cu: 0.3% or more and 0.5% or less, Mg: less than 0.0005%, and the balance being Fe and inevitable impurities.