| 摘要 |
<p>The present invention relates to a low gravity steel material having excellent ductility and a method for manufacturing the same. An embodiment of the present invention provides a low gravity steel material having excellent ductility and a method for manufacturing the same. The steel material includes 0.4-1.0 wt% of C, 20-30 wt% of Mn, 10-15 wt% of Al, 0.5-3.5 wt% of Ni, 0.01 wt% or less N, and remaining amount of Fe and impurities inevitably contained, and is composed of 40 area% or greater of austenite and remaining area% of ferrite in a microstructure thereof. The present invention can provide a steel material having 1000PMa or greater of tensile strength, 10% or greater of room-temperature ductility, and 15% or greater of weight reduction ratio.</p> |
