European Steel Numbering System
The European Steel Numbering System (ESNS) is a numerical method of categorizing different types of steel, developed by Europe and adopted in many countries worldwide. This system is based on the European material numbering standard, EN 10027-2, and provides a uniform way to describe different types and grades of steel.
The European steel numbering system divides steels into seven main groups or families, based on their chemical composition. These are the non-alloy steels, low-alloy steels, stainless steels, alloy steels, tool steels, high-alloy steels, and special purpose steels. Within each group there are many grades, determined by their particular alloying elements and chemical composition.
The ESNS uses a ten-digit number to define each steel grade. This number is composed of three to five digits, followed by a dot, and then the last five digits signifying the specific grade. The first three to five digits represent the chemical elements in the steel, usually based on their percentage by weight. For example, a steel containing iron, carbon, andManganese may have the prefix ‘001’.
Following the prefix is a dot and then the last five digits, which identify the specific grade of the steel. The first two digits in this case signify the carbon content of the steel. For example, if the steel contains 0.30% carbon, the steel may have the last five digits “0.30”. The third and fourth digits of the grade signify the manganese content, while the fifth digit is a letter that denotes any additional elements that the steel may contain. For example, a letter M may indicate molybdenum content.
The system is widely used by steel manufacturers, steel traders, and engineers for the classification and identification of different steels. The ESNS also allows for comparison between different grades of steel, providing useful information for decision makers when selecting the most suitable steel for a specific application.
The European steel numbering system is simple, flexible and widely understood, making it an important component of the European steel industry. The system is robust and user friendly and allows for the easy sharing of information between different countries and organizations. This makes it an extremely helpful tool for both industry professionals and steel producers, streamlining the manufacturing process.
