High manganese steel

A high manganese steel comprising 0.5 to 1.2 wt % of carbon (C), 0.1 to 2.3 wt % of silicon (Si), 15.3 to 30 wt % of manganese (Mn), 10.5 to 13.0 wt % of aluminum (Al), 0.01 to 3.0 wt % of nickel (Ni), 0.01 to 0.5 wt % of chromium (Cr), 0.01 to 0.4 wt % of molybdenum (Mo), 0.01 to 0.5 wt % of vanadium (V), 0.005 to 0.3 wt % of niobium (Nb), 0.005 to 0.3 wt % of titanium (Ti), and remainder iron (Fe) and other inevitable impurities, wherein the high manganese steel has a density of 7.0 (g/cm3) or less, an elongation of 41.6% or more, and a work hardening exponent (n) of 0.226 or more.

A high manganese steel consisting essentially of 0.5 to 1.2 wt % of carbon (C), 0.1 to 2.3 wt % of silicon (Si), 15.3 to 30.3 of manganese (Mn), 10.5 to 13.0 wt % of aluminum (Al), 0.01 to 3.0 wt % of nickel (Ni), 0.01 to 0.5 wt % of chromium (Cr), 0.01 to 0.4 wt % of molybdenum (Mo), 0.01 to 0.5 wt % of vanadium (V), 0.005 to 0.3 wt % of niobium (Nb), 0.005 to 0.3 wt % of titanium (Ti), and iron (Fe), wherein the high manganese steel has a density of 7.1 (g/cm3) or less, a yield strength of 705 MPa or more, a tensile strength of 1120 MPa or more, an elongation of 41.6% or more, and a work hardening exponent (n) of 0.208 or more, wherein a β-manganese phase is formed in the high manganese steel, and wherein the high manganese steel has a density of 7.0 (g/cm3) or less, and a work hardening exponent (n) of 0.226 or more.