Ferritic stainless steel sheet, manufacturing method of ferritic stainless steel sheet and automobile exhaust system parts

摘要

PROBLEM TO BE SOLVED: To provide a ferrite-based stainless steel sheet having excellent workability and high-temperature salt damage resistance, a method for manufacturing a ferrite-based stainless steel sheet, and an automobile exhaust system component. SOLUTION: A ferrite stainless steel sheet having a predetermined chemical composition and satisfying the formulas (i) to (iii), and an automobile exhaust system component using the same. Al + 1.7Si + 0.8Mo + 0.3DA-0.5 ≤ 6.0 ... Equation (i) 2.6Al + 4.3Si + 1.5Mo ≥ 5.95 ... Equation (ii) Al / O ≥ 200 ... Equation (ii) iii) {The element symbol in the formula means the content (mass%) of the element, and DA means the average crystal grain size (mm) at the center of the plate thickness. } [Selection diagram] Fig. 1