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Dec 16, 2022

Our Steel Number Expression Method

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A. Overview of China's steel number expression methodSteel number for short, is the name taken for each specific steel product, is a common language for people to understand the steel. China’s steel number, according to the national standard “Steel Product Grade Method” (GB221-79), using the

A. Overview of China's steel number expression method

Steel number for short, is the name taken for each specific steel product, is a common language for people to understand the steel. China’s steel number, according to the national standard “Steel Product Grade Method” (GB221-79), using the hanyu pinyin letters, chemical element symbols and Arabic numerals combined method of expression. That is.


① The chemical elements in the steel number are expressed by international chemical symbols, such as Si, Mn, Cr ……, etc. Mixed rare earth elements with ” RE ” (or ” Xt “) said.


② product name, use, smelting and pouring methods, etc., generally using the abbreviated letters of Hanyu Pinyin, see table.


③ steel in the main chemical element content ( % ) using Arabic numerals.


Table: GB standard steel number used in the abbreviated letters and their meanings


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<td valign="top" width="15%" style="box-sizing: border-box; padding: 8px; border-top-width: 0px; border-lef

Name

Chinese Character

Symbol

Font

Position

Yield point

Yield

Q

Capitalization

Head

Boiling stee

boiling

F

Capitalization

tail

Semi-sedated steel

semi

b

lowercase

tail

Calming steel

town

Z

Capitalization

tail

Special sedation steel

special town

TZ

Capitalization

tail

Oxygen converter (steel)

Oxygen

Y

Capitalization

Alkaline air converter (steel)

Alkaline

J

Capitalization

Free-cutting steel

easy

Y

Capitalization

Head

Carbon tool steel

Carbon

T

Capitalization

Head

Rolling bearing steel

Rolling

G

Capitalization

Head

Steel for welding rod

Weld

H

Capitalization

Head

High grade (high quality steel)

High

A

Capitalization

tail

Special grade

Special

E

Capitalization

tail

riveted screw steel

riveted screw

ML

Capitalization

Head

Anchor chain steel

Anchor

M

Capitalization

Head

Mining Steel

mining

K

Capitalization

tail

Steel for automobile beams

beam

L

Capitalization

tail

Steel for pressure vessel

capacity

R

Capitalization

tail

Steel for multi-layer or high-pressure vessels

high level

gc

lowercase

tail

Cast steel

Cast steel

ZG

Capitalization

Head

Cast steel for rolls

Casting rolls

ZU

Capitalization

Head

Steel for Geological Drilling Tubes

Geological

DZ

Capitalization

Head

Hot rolled silicon steel for electrical engineering

Electrothermal

DR

Capitalization

Head

Cold-rolled non-oriented silicon steel for electrical engineering

El

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