Fushun Special Steel P20H and 718H are two commonly used plastic mold steels. Although they are both high-strength steels, there are some differences. The following is an introduction by Pengcheng die steel technicians to introduce the difference between P20H and 718H.
The main differences between P20H and 718H die steels are the quality grade, die life, polishing performance, application, mold size, **, and uniformity of core hardness and surface hardness.
1.Quality grade.
The quality grade of 718H die steel is higher than that of P20H die steel.
2.Mold life.
The mold life of 718H die steel is 2 3 times that of P20H die steel, the mold life of P20H die steel is about 200,000 molds, and the mold life of 718H die steel is about 500,000 molds.
3.Polishing properties.
The polishing performance of 718H mold steel is higher than that of P20H mold steel, which is suitable for the production of smooth or translucent plastic products, while P20H mold steel is suitable for the production of plastic products without glossy requirements.
4.Applications.
718H mold steel is mainly used for plastic molds that require long life and glossy surface, such as household appliance shells, while P20H mold steel is mainly used for ordinary plastic molds, such as toy molds, sliders, rows, core pulls, mold bases, etc.
5.Mold size.
718H mold steel is suitable for large plastic molds, while P20H mold steel is suitable for small plastic molds.
6.The 718H die steel is higher than the P20H die steel.
In addition to the above mentioned differences, there are also some differences between P20H and 718H die steels in terms of heat treatment and processing. In terms of heat treatment, P20H die steel has a wide range of quenching temperatures, and it is easy to obtain uniform structure and properties, so the heat treatment process is relatively simple. However, due to the addition of nickel element, 718H mold steel has higher requirements for heat treatment, and needs more precise control of quenching temperature and tempering time to obtain the best performance. In terms of processing, the cutting performance of P20H die steel is good, and conventional cutting tools can be used for processing, and the processing efficiency is high. However, due to its high hardness and strength, 718H die steel is relatively difficult to cut, requiring sharper cutting tools and higher cutting speeds. In addition, there are certain differences between P20H and 718H die steels in terms of welding performance, corrosion resistance and wear resistance. Therefore, when choosing which die steel to use, it needs to be comprehensively considered according to the specific application scenario and requirements. In short, there are certain differences between Fushun Special Steel's P20H and 718H die steels in terms of quality grade, mold life, polishing performance, application, mold size, uniformity of core hardness and surface hardness. These differences make P20H and 718H die steels have different application advantages and application ranges in different fields. When choosing to use, it is necessary to comprehensively consider the actual needs and scenarios to select the most suitable die steel material.