F30C is a new type of hot work die steel with excellent thermal crack resistance, overall cracking resistance, impact toughness, ductility and excellent tempering resistance. After heat treatment, the impact energy at room temperature can reach 35±2J, the hardness is 43±1HRC, and the thermal conductivity at room temperature is 26.07W/ (m*k), which is suitable for high demand hot work applications such as die casting, extrusion and forging.