Currently, most carbon steel Mold steels have a wide range of applications due to their low price, convenient use, and certain mechanical properties. In addition to Plastic Mold steels, there are also other mold steels such as pre hardened plastic mold steels, among which there are many types of mold steels. Currently, the commonly used types include pre hardened plastic mold steels, carburized plastic mold steels, and age hardened plastic mold steels. Hardened plastic mold steel is a hardness rule applied when machining steel. This type of steel has excellent cutting performance and can be directly processed in the inner cavity. Generally used for the processing of a large number of plastic products, such as mirror molds, using 32 to 40 HRC to calculate the hardness. 
Selection, manufacturing, and manufacturing of mold materials. Exquisite polishing process functions. Injection molded products have excellent quality and require a small surface roughness value of the mold cavity. The selected steel requires less impurities, uniform arrangement, no fiber guidance, and no pitting or orange peel like defects during polishing. Excellent thermal stability;
The shape of parts in injection molds is often complex and difficult to reprocess after quenching. Therefore, materials with good thermal stability should be selected as much as possible. After heat treatment of plastic mold molding, due to small linear expansion coefficient, small heat treatment deformation, small standard change rate caused by temperature differences, stable metallographic arrangement and standard mold, processing can be reduced or stopped, and the standard accuracy and surface roughness requirements of plastic mold can be guaranteed.
