In addition to the high hardness, strength, red hardness, wear resistance and toughness of the stainless steel flange material, the hot working die steel of the stainless steel flange material should also have good high-temperature strength, thermal fatigue stability, thermal conductivity and corrosion resistance. In addition, the stainless steel flange material should have high hardenability to ensure that the entire section has consistent mechanical properties. The steel for die casting die made of stainless steel flange material shall also have the performance that the surface layer will not crack after repeated heating and cooling, and the stainless steel flange material will withstand the impact and erosion of liquid metal flow. This kind of stainless steel flange steel generally belongs to medium carbon alloy steel, with a carbon mass fraction of 0.30% - 0.60%, which belongs to hypoeutectoid steel. Some stainless steel flange steels become eutectoid or hypereutectoid steel due to the addition of more alloy elements (such as tungsten, molybdenum, vanadium, etc.). Commonly used stainless steel flanges are made of chromium manganese steel, chromium nickel steel, chromium tungsten steel, etc.
Plastic moulds made of stainless steel flanges include thermoplastic moulds and thermosetting moulds. Steel for plastic mold made of stainless steel flange is required to have certain strength, hardness, wear resistance, thermal stability and corrosion resistance. In addition, it is also required to have good processability, such as small heat treatment deformation, good processing performance, good corrosion resistance, good grinding and polishing performance, good repair welding performance, high roughness, good thermal conductivity and stable size and shape under working conditions of stainless steel flange material. In general, hot work die steel can be used for injection molding or extrusion molding of stainless steel flange materials; Cold working die steel can be used for thermosetting forming and dies requiring high wear resistance and high strength.
