▎ 摘　　要

NOVELTY - An austenitic stainless steel comprises 0.01-0.02 wt.% graphene, 18-20 wt.% nickel, 17-20 wt.% chromium, 0.4-0.7 wt.% silicon, 4.5-5.5 wt.% molybdenum, 1.9-2 wt.% manganese, and balance iron. USE - Austenitic stainless steel used for oil casing material for use in oxygen-filled environment. ADVANTAGE - The stainless steel passivation film formed by the austenitic stainless steel has enhanced density, and low carrier concentration compared with the existing steel material. The austenitic stainless steel has high magnesium oxide content in inner and outer passivation films, high node concentration which suppresses the pitting problem caused by chloride ions, thereby promoting oxygen recovery and enhancing oil recovery. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of austenitic stainless steel, which involves using degassing agent.