Steels for heat treatment, alloy steels and steels for automation. Part 3: Carburising steels

This technical specification addresses the classification and technical requirements for steel, alloy steel, and screw machine steel intended for heat treatment processes. Specifically, it details the characteristics applicable to carburizing steels, which are designed to undergo a hardening treatment where carbon is diffused into the surface layer. The document establishes standardized criteria for chemical composition, mechanical properties, and microstructure necessary to ensure material performance in demanding engineering applications. It serves as a reference for manufacturers, metallurgists, and quality control professionals involved in the production and selection of alloyed materials for components subjected to surface hardening. The content aligns with established international frameworks, ensuring consistency in material definition across different industrial sectors. It provides clear guidelines for identifying suitable grades for specific manufacturing needs, covering aspects such as carbon content and alloying elements that influence the hardening depth and core strength. This resource is essential for maintaining uniformity in the supply chain for automotive and machinery parts where wear resistance is critical.