| 摘要 |
<p>Disclosed is a highly corrosion-resistant hot-rolled ferrite stainless steel sheet having excellent toughness, which has a Charpy impact value of 100 J/cm2 or more at -50°C. Specifically disclosed is a hot-rolled ferrite stainless steel sheet characterized by comprising, in mass%, 0.020% or less of C, 1.0% or less of Si, 1.0% or less of Mn, 0.06% or less of P, 0.01% or less of S, 18.0-24.0% of Cr, 0.3% or less of Mo, 0.15-0.40% of Nb, 0.015% or less of Ti, 0.020% or less of N and 0.20-0.40% of Al, wherein these components fulfill the requirements represented by formulae (A) and (B) and Fe and unavoidable impurities make up the remainder. Ti×N = 8.0×10-5 (A) 10×(C+N) = Nb = 0.25+(C/12+N/14)×93 (B) (In the formulae, each element symbol represents the content (expressed in mass%) of the element in the steel.)</p> |
