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Alloying designation systems standard lists and material classification

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Introduction to the Unified Numbering System of Ferrous Metals and Alloys

The Unified Numbering System (UNS) for Metals and Alloys serves as a comprehensive standardization framework for identifying and categorizing ferrous metals and alloys across international markets. This system effectively eliminates confusion caused by duplicate identification numbers and provides a structured approach through nine distinct series of designations.

Introduction to the Unified Numbering System of Nonferrous Metals and Alloys

Unified numbering system (UNS) is a system of designations established in accordance with ASTM E527 and SAE J1086, Recommended Practice for Numbering Metals and Alloys. Its purpose is to provide means of correlating systems in use by such organizations as American Society for Testing Materials (ASTM) and Aluminum Association (AA), as well as individual users and producers.
This designation system establishes 9 series of designations for nonferrous metals and alloys. Each UNS designation consists of a single-letter prefix followed by five digits. In most cases the letter is suggestive of the family of metals identified: for example, A – for aluminum, C – Copper and Copper Alloys, Z – Zinc and Zinc Alloys, etc.

Italian (UNI) Standards for Steel Materials

In 1993, the Italian National Standards Institute (UNI) adopted the International Classification for Standards (ICS) established by the International Organization for Standardization (ISO). UNI standards, produced by the Ente Nazionale Italiano di Unificazione, use the prefix UNI followed by a four-digit product form code and an alphanumeric alloy identification, similar to the DIN system.

JIS Standard List: Castings, Forgings, Welding and Filler Materials and Powder Metallurgy/Sintered M

This comprehensive guide presents Japanese Industrial Standards (JIS) for metallurgical materials including castings, forgings, welding materials, and powder metallurgy products. The JIS designation system utilizes a prefix followed by a letter indicating the material category and four digits.

JIS Standard List: Iron, Structural and Constructional Steels, Stainless Steels and Coated Steels

This comprehensive guide details the Japanese Industrial Standards (JIS) classification system for various steel and iron materials. Developed by the Japanese Industrial Standards Committee (JISC) in Tokyo, these standards are widely adopted throughout Asia and the Pacific regions, serving as a foundation for Korean, Chinese, and Taiwanese national systems.

JIS-standards for steel materials

The Japanese Industrial Standards (JIS) for steel materials encompass three primary volumes of standardized specifications. These standards cover structural, constructional, tool, stainless, and heat-resisting steels, providing essential details about chemical composition, mechanical properties, and specific applications. They include specifications for various steel forms such as plates, sheets, strips, pipes, and castings, with a focus on uses in boilers, pressure vessels, and specialized industrial applications.