Heat treatable steels, alloy steels and free-cutting steels - Part 5: Nitriding steels (ISO 683-5:2017)

This technical specification establishes requirements for nitriding steels within the category of heat-treated steel, alloy steel, and automatic steel. It focuses specifically on the fifth part of a comprehensive series concerning steel classification and properties. The document outlines criteria for chemical composition and mechanical performance applicable to steels designed for nitriding processes, which are utilized to enhance surface hardness and wear resistance. By defining precise limits for alloying elements and impurities, the standard ensures consistency in material quality for manufacturing applications. It aligns with international classification systems while incorporating regional technical adaptations. The content covers the definition of specific steel grades suitable for this treatment method, providing guidance on their metallurgical characteristics. This resource serves as a reference for producers and users to verify material suitability for nitriding operations. The specifications address the necessary properties that enable the formation of a hardened case layer through nitrogen diffusion. Adherence to these guidelines facilitates interoperability and quality assurance in industrial settings involving heat-treated alloys.