The invention provides 800-1,600 MPa grade high strength
austenitic stainless steel, manufacturing method and a warm forming method. The
austenitic stainless steel comprises steel chemical components in weight of 0.04%-0.14% of C, 0.2%-0.6% of Si, 2%-12% of Mn, 12%-18% of Cr, 0.5%-6.5% of Ni, less than or equal to 0.03% of P, less than or equal to 0.02% of S, 0.05%-0.25% of N, 0%-2% of Cu, one or more of Mo, Nb and Ti and the balance of Fe and inevitable impurities, and the condition that W(Ni)eq is larger than or equal to 20.5 and smaller than or equal to 25.5 is required to be met. The high strength
austenitic stainless steel is obtained by controlling the rolling reduction to be 10%-40% in a rolling process, the tensile resistance is 800-1,600 MPa, and the extension is 13%-40%. At the same time, with the warm forming method, ultra-complex formed high strength stainless steel parts can be obtained, and the high strength austenitic stainless steel has excellent
corrosion resistance, high strength and delayed
cracking resistance.