As a widely used pre-hardened plastic mold steel for precision mold bases, 718 steel undergoes professional pre-hardening treatment before leaving the factory. Its core performance characteristics can be summarized as follows:

The steel comes with uniform pre-hardened hardness (typically in the range of HRC 30-40) upon delivery. This pre-hardened state provides good machinability, allowing direct machining operations such as turning, milling, drilling, and grinding to shape the mold base. More importantly, it eliminates the need for subsequent quenching, fundamentally avoiding risks such as deformation, dimensional inaccuracies, and even cracking caused by quenching. This ensures high dimensional accuracy and long-term dimensional stability for mold bases, especially for medium to large or structurally complex ones.

With its uniform and fine material texture, 718 steel exhibits good polishing performance after appropriate machining, enabling a high surface finish to meet applications with stringent requirements for mold appearance and product surface quality. Additionally, the material itself offers good corrosion resistance, capable of withstanding corrosive gases and plastic additives during the injection molding process. This helps extend the service life of the mold base and maintain the cleanliness of the product surface.

Combining the advantages of pre-hardening (no heat treatment required), good machinability, dimensional stability, and excellent surface quality, 718 steel is particularly suitable for manufacturing mold bases (mold frames) for various precision plastic molds. It is widely used in molds with high requirements for dimensional accuracy, geometric tolerances, and surface polishing, such as mold bases for plastic products like large home appliance housings, automotive components, and electronic communication casings. It is a classic material choice that balances machining efficiency, manufacturing cost, and mold reliability.