The austenite type rustless steel null for press molding which in deep drawing Characteristic and brattice Characteristic

摘要

PURPOSE: To produce an austenitic stainless steel for press forming excellent in deep drawability and bulging properties by specifying its compsn. constituted of C, Si, Mn, Ni, Cr, Cu, Al, N and iron. ;CONSTITUTION: This austenitic stainless steel is the one having a compsn. contg., by weight, 0.03 to 0.10% C, 0.5% Si, ≤3.0% Mn, 6.0 to 10.0% Ni, 15.0 to 19.0% Cr, 1.0 to 4.0% Cu, 0.2 to 0.5% Al and ≤0.05% N, in which Ni equivalent shown by the formula : Ni equivalent = 12.6(C+N)+0.35Si+1.05Mn+Ni+0.65Cr+0.6Cu-0.4Al lies in the range of 21.0 to 23.0, and the balance Fe with inevitable impurities, and in which, by the combined addition of small amounts of Al and Cu and the optimum regulation of C and Ni equivalent, its surface properties, deep drawability, bulging properties or the like are improved. In this stainless steel, 0.05 to 3.0% Mo may furthermore be incorporated or a part of iron may be substitured by 0.001 to 0.020% B.;COPYRIGHT: (C)1996,JPO