METAL MATERIAL WITH IMPROVED LOW-TEMPERATURE PROPERTY AND METHOD FOR MANUFACTURING SAME

摘要

The present invention relates to a metal material with an improved low-temperature property and a method for manufacturing the same, and the metal material is capable of being safely used at a low temperature by inducing a ductile fracture through an increase in fracture toughness at a low temperature. According to one embodiment of the present invention, provided are a metal material with an improved low-temperature property, in which at least one notch is recessed on a surface thereof and at least one fine crack is processed at a lower end of the notch that intersects with the notch in a notch width direction, and a method for manufacturing the same.