GB/T 3274
 

Item

Steel Mark

Specification

Thickness Range(mm)

1

Q235B

GB/T 3274

6~200

2

Q235C

3

Q235D

4

Q275B

5

Q275C

6

Q275D

7

Q345A

8

Q345B

9

Q345C

10

Q345D

11

Q345E

12

Q420A

13

Q420B

6~100

14

Q420C

15

Q420D

16

Q460C

6~80

17

Q460D

18

Q460E