One, our country steel grade states the method is summarized
The brand abbreviation steel grade of steel, it is the name that place of product of specific to avery kind of steel takes, it is a kind of of people understanding steel common language. The steel grade of our country represents a means, according to national level " steely product name represents a means " (GB221-79) in regulation, the method that uses symbol of letter of Chinese Phonetic Alphabet, chemical element and band of arabic numerals photograph expresses. Namely:
Chemical element uses internationalization to learn a symbol to express in ① steel grade, for example Si, mn, cr …… . Mixture rare-earth element is used“RE ” (or“Xt ” ) express.
② product name, utility, smelt and pouring the method, the abbreviate letter that uses Chinese Phonetic Alphabet commonly expresses, see a table.
In ③ steel content of main and chemical element (% ) use an arabic numerals to express.
Watch: The abbreviate letter that uses in GB standard steel grade reachs its meaning
Name
Chinese character
Symbol
Font
The position
Yield point
Bend
Q
Great
First
Boiling steel
Boil
F
Great
End
Half composed steel
Half
B
The ordinary form of a Chinese numeral
