| 摘要 |
PURPOSE: A ferrite stainless steel is provided to achieve a high resistance against pitting corrosion and stress corrosion, and superior embrittlement resistance. CONSTITUTION: A ferrite stainless steel is composed of Fe as a main component, 25.0 to 30 weight% Cr, 2.0 to 6.0 weight% W, 0.10 to 0.30 weight% Nb, 0 to 2.0 weight% Mo, 0.5 weight% or less Si, 0.5 weight% or less Mn, 0.02 weight% or less P, 0.01 weight% or less S, o.o1 weight% or less C, 0.02 weight% or less N, and 0.025 weight% C+N. As compared with a conventional stainless steel, Mo content is reduced while W is added in order to improve embrittlement resistance.
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