This article examines the European Norm (EN) standard designation system, established to create a unified language for steel specification across Europe. Since 1988, these mandatory standards have gradually replaced national systems in 18 Western European countries. The article details the structure and implementation of EN standards, their relationship with international standards through ISO, and their comprehensive coverage of steel products.
The GB standard designation system is a comprehensive framework for classifying iron, carbon, and alloy steels in China. It outlines various delivery conditions and provides specific designations for different types of steel, including structural, tool, and stainless steels. This article explains the structure of GB designations, their meanings, and the relevant standards.
GOST (Russian: ГОСТ), an acronym for gosudarstvennyy standart (государственный стандарт), means "state standard." Developed during the Soviet Union era, GOST standards continue to define technical regulations across Russia and other CIS countries. These standards include a two-part numerical format and cover a wide range of materials, particularly metals and alloys.
The Japanese Industrial Standards (JIS) system provides a comprehensive framework for categorizing industrial specifications across various sectors. Created by the Japanese Industrial Standards Committee (JISC), this system begins with the prefix "JIS," followed by a letter denoting the industry division, and then four digits for specific identification.
The SAE AMS designation system is a standardized method for identifying the compositions of alloy steels, using a numerical index. This system is particularly useful for classifying different types of steels based on their alloying elements and carbon content. The first digit of the number designates the steel's type, while the second digit generally indicates the predominant alloying element's approximate percentage. The last two digits indicate the carbon content.
This article explains the standardized SAE-AISI designation system for carbon and alloy steels. The system primarily uses a four-digit numerical code to identify different steel grades based on their chemical composition. The first digit indicates the main alloying element, the second digit shows the concentration of major elements, and the last two digits represent carbon content.