| 摘要 |
Disclosed is a ferritic stainless steel sheet with excellent thermal fatigue properties, including, by mass %, 0.03% or less of C, 1.0% or less of Si, 1.5% or less of Mn, 0.6% or less of Ni, 10~20% of Cr, 0.05~0.30% of Ti, 0.51~0.65% of Nb, 0~less than 0.10% of Mo, 0.8~2.0% of Cu, 0~0.10% of Al, 0.0005~0.02% of B, 0~0.20% of V, and 0.03% or less of N, with the balance being Fe and inevitable impurities, having a composition satisfying the following equations (1) and (2) and having a structure in which epsilon-Cu phase grains each having a long diameter of 0.5 mum or more are present in a density of 10 or less per 25 mum<SUP>2</SUP>: Nb-8(C+N)>=0 . . . (1), 10 Si+20 Mo+30 Cu+20(Ti+V)+160 Nb-(Mn+Ni)>=100 . . . (2). The ferritic stainless steel sheet, having a relatively inexpensive component composition, has excellent thermal fatigue properties, and is suitable for use in an automotive exhaust-gas path member, including an exhaust manifold, a catalyst converter, a front pipe, or a center pipe.
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