Steel Numbering System in China
In China, identifying the different types of steel products is done through designations and numbering systems. Steel designation and numbering systems facilitate the classification of steel types, and are thus important in helping to ensure proper use of steel in China. A comprehensive understanding of China’s steel numbering system is vital for anyone managing a business in China’s steel industry.
China’s steel numbering system is made up of two parts: the national standard GB/T 8162 (the national standard for steel designation and numbering) and the Chinese National Corporation of Standards (CNSC)’s supplementary national standard CPA 12-2002 (steel designation and numbering).
The national standard GB/T 8162 defines steel designation and numbering in the most basic way, and it is largely used for definition purposes. It is a general guideline for the classification of steel according to chemical composition and mechanical properties. The steel designation system of this national standard involves grouping of steel products mainly by their chemical components rather than their physical properties, as well as a two-character designation for each steel grade.
On the other hand, the supplementary national standard CPA 12-2002 provides a more detailed classification of steel based on the way in which it was produced, as well as its physical and mechanical properties. This standard is more useful for classifying and identifying various steel products, and it is well-suited for service and production in the steel industry in China. It provides a detailed numeric designation system based on the manufacturing process of steel products, as well as a general three-letter coding system which can be used to identify the steel grade in question. The numerical designation given to each steel grade depends on a number of specific features, including the production method, metallurgical characteristics, and the number of elements present in the steel.
Overall, having an understanding of China’s steel numbering system is essential for anyone involved in the Chinese steel industry. It is through an understanding of this system that its users are able to identify and classify various types of steel products in a reliable and efficient manner. This understanding is also useful for members of the steel supply chain, allowing them to make more informed applications and selections of steel products.
