1.2345 steel, as a material for die-casting molds, is suitable for manufacturing high-temperature components of aluminum/magnesium alloys and can extend the life of zinc/copper alloy die-casting molds through surface strengthening processes. In the field of hot processing, its high temperature stability supports the long-term use of titanium alloy extrusion molds and automotive forging hot forging dies. In the application of plastic molds, 1.2345 steel has the ability to withstand high temperature engineering plastic injection molding and optical grade surface treatment, while exhibiting better wear resistance than traditional materials in precision stamping and powder metallurgy fields.