The product brand is generally represented by a combination of Chinese pinyin letters, chemical element symbols and Arabic numerals. To wit:

① The chemical elements in the steel number are represented by international chemical symbols, such as Si, Mn, Cr...... Let's wait. Mixed rare earth elements are denoted by "RE" (or "Xt").

② Product name, use, smelting and pouring methods, etc., are generally expressed by abbreviations of Chinese pinyin.

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

When the Chinese phonetic alphabet is used to represent the product name, use, characteristics and process methods, the first letter is generally selected from the Chinese phonetic alphabet representing the product name. When repeated with the letter selected by another product, the second letter or third letter can be used, or the first alphabetic letter of the two Chinese characters can be selected at the same time.

If there are no available Chinese characters and Chinese pinyin for the time being, the symbols shall be English letters.