In the punching process, the mold must have a certain toughness. When cutting thick sheet and strip, the die cutting edge will withstand very high tensile stress, so they requested that the mold must have a high toughness if they are not cracking. The thicker parts to be machined on the requirements of the higher toughness of the mold, then you must use high toughness and impact resistance of the mold material, and also must have good wear resistance to ensure reasonable economic production operation. Thermal cracking is a die-casting and forging industry in a very common failure mechanism. DIEVAR excellent scalability make it the best performance of thermal cracking, the other DIEVAR superior toughness and hardenability to further improve the performance of thermal cracking, thermal shock cracking if not the major factor in the failure die you can die appropriate increase in hardness (+2 HRC). Enhanced resistance to mold the DIEVAR main failure mechanism (such as: thermal fatigue, cracking, hot wear and plastic deformation) of capacity, so it significantly improves the life of the die and mold better economic efficiency. DIEVAR is used for die casting, forging, hot extrusion die steel industry performance requirements the best choice.