Representation method of steel grade in China (I): Overview

The designation of steel products in China is generally expressed by the combination of Chinese Pinyin letters, chemical element symbols and Arabic numerals. Namely:

① Chemical elements in steel grades are represented by international chemical symbols, such as Si, Mn, Cr, etc. Mixed rare earth elements are represented by “re” (or “XT”).

② Product name, purpose, smelting and pouring method, etc. are generally represented by abbreviations of Chinese pinyin,

③ The content (%) of main chemical elements in steel is expressed in Arabic numerals.

When the Chinese phonetic alphabet is used to represent the product name, purpose, characteristics and process method, the first letter is generally selected from the Chinese phonetic alphabet representing the product name

When it is repeated with the letter selected by another product, the second or third letter can be used, or the first pinyin letter of two Chinese characters can be selected at the same time.

If there are no available Chinese characters and Pinyin, the symbols shall be English letters.