Why choose 718H as the mold core material for Instrument and Device Shell?

The 718H selected for Instrument and Device Shell is a mold steel with high hardness and strength, and its hardness range is usually from HRC30-34 to HRC42-46. This high hardness and strength allows 718H to maintain stable shape and size during the injection molding process that withstands high pressure and high stress, ensuring that the instruments and equipment casings produced have precise dimensions and excellent mechanical properties.
After 718H undergoes surface treatments such as pre-hardening and nitriding, the surface hardness is significantly improved, and the wear resistance is also enhanced. This allows the mold to maintain a low wear rate during long-term, high-frequency use, thereby extending the service life of the mold and reducing production costs. Due to its high strength and toughness, 718H mold steel can still maintain excellent resistance to deformation in high-temperature, high-pressure injection molding environments, ensuring that the produced shells have stable shapes and sizes.
718H has excellent machining performance, is easy to perform rough machining operations such as cutting, milling, and drilling, and can obtain good surface quality through finishing methods such as grinding. This reduces the difficulty and cost of mold processing and improves production efficiency. After pre-hardening treatment, 718H has uniform material, high cleanliness and excellent polishing performance. This enables the mold surface to achieve a very high smoothness, meeting the high surface quality requirements of instruments and equipment housings.
The alloy elements added to 718H steel improve its corrosion resistance, allowing the mold to better resist erosion from the external environment during use and maintain the accuracy and stability of the mold. During the high-temperature injection molding process, 718H can maintain stable physical and chemical properties and is not prone to thermal expansion or thermal deformation, thereby ensuring that the produced shell has stable size and shape.
The price of 718H mold steel is relatively high, but its excellent performance and long service life make it highly economical in long-term use. At the same time, due to its wide application fields and mature processing technology, 718H mold steel has high availability and low processing cost in the market. 718H is suitable for manufacturing large injection molds and plastic product molds with high surface finish requirements. These features make 718H an ideal choice for injection molding molds that require high precision and quality, such as instrument and equipment housings.
The choice of 718H as the material of the mold core for the Instrument and Device Shell is due to its high hardness, high strength, excellent wear resistance, anti-deformation ability, good processing performance, corrosion resistance and thermal stability, as well as economy and applicability. consider.