What is the 718# Mould steel hardened
718 steel hardened for Melamine Tableware Mould In order to improve the service life of the mold to more than 800,000 mold times, the pre-hardened steel can be implemented by hardening and low-temperature tempering. When quenching, first preheat at 500-600 ℃ for 2-4 hours, and then keep it at ...
read more