Patent ID: 7014719
Filing Date: 2006-03-21
Classification: C21D,C22C

Abstract:
1. An austenitic stainless steel, which has an excellent property in fine blankability, consisting essentially of 0.010–0.050 mass % C, 0.010–0.030 mass % N, (C+½N) up to 0.060 mass %, Si up to 1.0 mass %, Mn up to 5 mass %, S up to 0.003 mass %, S/Mn ratio up to 0.003, 15–20 mass % Cr, 5–12 mass % Ni, Cu up to 5 mass %, optionally Mo up to 3.0 mass % and the balance being Fe except inevitable impurities, under the condition that a value Md 30 representing a ratio of a strain-induced martensite phase defined by the under-mentioned formula is within a range of −60 to −15.2: and wherein a blanked sheet of said austenitic stainless steel will have a shear plane ratio of 100%.