| abstract |
The present invention is in weight%, carbon (C): 0.3-1.0%, silicon (Si): 0.3-2.5%, manganese (Mn): 10-18%, aluminum (Al): 1.0-4.0%, titanium (Ti) ): 0.01 to 0.3%, boron (B): 0.0005 to 0.01%, nitrogen (N): 0.04% or less, phosphorus (P): 0.1% or less, sulfur (S): 0.02% or less, balance iron (Fe) and Austenitic high strength steel sheet containing other unavoidable impurities and satisfying 60C + Mn + 2Ni + 9Al + 3Si≥50% by weight. Nickel (Ni): 0.05-2.0%, Chromium (Cr): 0.01-2.0 %, Niobium (Nb): 0.01 to 0.10% and vanadium (V): 0.01 to 0.5% may further include one or two or more. |