The invention discloses a high-forming
nitrogen-containing
austenitic stainless steel and a manufacturing method thereof. The composition of the steel comprises the following components of, by weight,0.001-0.05% of C, 2.50-3.80% of Si, 6.0-8.0% of Mn, 13.5-15.0% of Cr, 1.0-2.5% of Ni, 0.12-0.15% of N, 3.5-5.0% of Cu, less than or equal to 0.004% of S, 0.1-0.2% of V, 0.1-0.2% of Nb, and the balance Fe and inevitable impurities, wherein C+N is less than or equal to 0.18% , (V + Nb) / C is larger than or equal to 5, the content of Si multiplied by 5.59 mJ / m<2> is greater than or equal to 14 mJ / m<2>, Md30 / 50 is 40-70 DEG C, the average grain size is larger than or equal to 90 microns, and the
hardness is less than or equal to HV180. According to the preparation method disclosed by the invention, the Ni is replaced with
nitrogen alloying, and the Mn, the Cu and the like which obtain
austenite structures are added; the Si and the like are added, so that lower
stacking fault energy is remarkably reduced; the initial
hardness of a material is reduced, and the temperature of the MD30 / 50 is controlled, so that the
martensite phase changes slowly in the strain process; the erishen value is larger than or equal to 14.5, LDR is larger than or equal to 2.4, the requirements of complex forming is met, and the performance is close to 304 DDQ with high forming and high cost, so that the steel can be widely applied to industries such as
electronics, instruments and apparatus, products and the like.