Steels for plastic material working are alloys designed to be used in the production of tools for processing and shaping plastics, such as injection molds, extrusion molds, and other components for plastic treatment. These steels must have good wear resistance, erosion resistance, and high-temperature strength, as molten plastic can reach high temperatures and cause significant mechanical stress on the molds. Furthermore, it is essential that steels for plastic working have good resistance to corrosion and fatigue, as molds are subject to repeated thermal and mechanical cycles. These steels are often heat-treated or nitrided to further enhance their surface hardness and wear resistance, ensuring long life and good finishing of the molded parts. They are used in various industrial sectors, such as automotive, electronics, packaging production, and the manufacture of plastic components for diverse applications, where high-performance tools and long tool life are crucial.