High-manganese austenitic steel was developed to improve the fracture toughness and safety of steel under cryogenic temperatures. and its austenite structure was formed by increasing the Mn content. The developed high-manganese austenitic steel was alloyed with austenite-stabilizing elements (e. g. https://www.roneverhart.com/SAAB-9-3-I-98-02-Frontlykt-Hoyre/