TC1.2343 is a high-performance mold steel developed by steel mills using new process technologies. Due to the use of special production processes with independent intellectual property rights, the material has extremely high purity, ultra-fine grain size, uniform organization, and all technical indicators have reached the advanced level of similar mold steels abroad. The material has excellent and stable properties, including toughness, wear resistance, polishing, corrosion resistance, etc. It is suitable for die-casting molds, extrusion molds, and high polishing plastic molds, which can greatly improve the appearance quality of products and extend the service life of molds.