Conventional die casting die steel. Low carbon content, high toughness and good thermal conductivity; at the same time, containing more carbide forming elements chromium, tungsten, vanadium, raising the temperature of the phase transition, steel has high temperature strength, hardness and good thermal fatigue resistance; hardenability. Suitable for the manufacture of high temperature, high stress, but not by impact load of die casting copper, aluminum, magnesium alloy with attached mode, the core, the gate set and shunt nail, beat the wax, hot shear knives, hot upsetting die, horizontal forging machine punch, inlaid block, etc.