Steels for plasticizing screws are specialized alloys used in the production of screws for plastic injection molding machines. Plasticizing screws are critical components in plastic processing, as they are responsible for melting, mixing, and plasticizing the plastic material inside the machine. These steels must be highly resistant to wear and corrosion, as they are subjected to high thermal and mechanical stresses during the plasticizing process. They must also ensure good machinability for the production of complex, durable screws with a smooth surface that reduces friction and improves process efficiency. Steels for plasticizing screws are also heat-treated to enhance surface hardness and fatigue resistance, ensuring long service life in high-temperature environments and at high rotational speeds. These steels are primarily used in the plastics industry, for the production of automotive components, household appliances, and packaging, where the quality of the plasticizing process is crucial for the final product’s quality.