Thermal fatigue properties, oxidation resistance and high-temperature salt corrosion resistance in excellent ferritic stainless steel

摘要

PPROBLEM TO BE SOLVED: To provide a ferritic stainless steel which has all of superior thermal fatigue characteristics, oxidation resistance and high-temperature salt-corrosion resistance though Mo, W and Cu are not added thereinto. PSOLUTION: The ferritic stainless steel has a component composition containing, by mass%, 0.015% or less C, 1.0% or less Si, 0.5% or less Mn, 0.040% or less P, 0.010% or less S, 0.03 to 0.30% Al, 16 to 20% Cr, 0.5% or less Ni, 0.015 to 0.030% N, 0.30 to 0.60% V, 10(C+N) to 0.60% Nb, 0.01% or less Ti, 0.01% or less Zr, 0.01% or less Ta, 0.1% or less Mo, 0.1% or less W while V and N satisfy the relation of (V×N)=0.003 to 0.015, and the balance Fe with unavoidable impurities. PCOPYRIGHT: (C)2010,JPO&INPIT