|
standard
|
Steel grade
|
chemical composition
|
Tensile properties
|
Charpy
|
||||||||||
|
C
|
Mn
|
P
|
S
|
Si
|
other
|
|
|
|
|
|
||||
|
max
|
max
|
max
|
max
|
max
|
min
|
max
|
min
|
max
|
D≤168.3mm
|
D>168.3mm
|
||||
|
GB/T3091-2008
|
Q215A
|
≤0.15
|
0.25<1.20
|
0.045
|
0.050
|
0.35
|
- - - - Nb\v\Ti See you GB/T1591-94 |
215
|
-
|
335
|
-
|
15
|
＞31
|
-
|
|
Q215B
|
≤0.15
|
0.25-0.55
|
0.045
|
0.045
|
0.35
|
215
|
335
|
15
|
＞31
|
|||||
|
Q235A
|
≤0.22
|
0.30-0.65
|
0.045
|
0.050
|
0.35
|
235
|
375
|
15
|
＞26
|
|||||
|
Q235B
|
≤0.20
|
0.30≤1.80
|
0.045
|
0.045
|
0.35
|
235
|
375
|
15
|
＞26
|
|||||
|
Q295A
|
0.16
|
0.80-1.50
|
0.045
|
0.045
|
0.55
|
295
|
390
|
13
|
＞23
|
|||||
|
Q295B
|
0.16
|
0.80-1.50
|
0.040
|
0.040
|
0.55
|
295
|
390
|
13
|
＞23
|
|||||
|
Q345A
|
0.20
|
1.00-1.60
|
0.045
|
0.045
|
0.55
|
345
|
510
|
13
|
＞21
|
|||||
|
Q345B
|
0.20
|
1.00-1.60
|
0.040
|
0.040
|
0.55
|
345
|
510
|
13
|
＞21
|
|||||
|
GB/T9711.1-1997
|
L175
|
0.21
|
0.60
|
0.030
|
0.030
|
-
|
Nb \ v \ Ti can be added to one of the three elements or any combination |
175
|
-
|
315
|
825
|
27
|
The choice of impact energy and shear area of one or two toughness index L555 see the standard
|
|
|
L210
|
0.21
|
0.90
|
0.030
|
0.030
|
210
|
335
|
25
|
|||||||
|
L245
|
0.26
|
1.15
|
0.030
|
0.030
|
245
|
415
|
21
|
|||||||
|
L290
|
0.28
|
1.25
|
0.030
|
0.030
|
290
|
415
|
21
|
|||||||
|
L320
|
0.30
|
1.25
|
0.030
|
0.030
|
320
|
435
|
20
|
|||||||
|
L360
|
0.30
|
1.25
|
0.030
|
0.030
|
360
|
460
|
19
|
|||||||
|
L390
|
0.26
|
1.35
|
0.030
|
0.030
|
390
|
490
|
18
|
|||||||
|
L415
|
0.26
|
1.35
|
0.030
|
0.030
|
415
|
520
|
17
|
|||||||
|
L450
|
0.26
|
1.40
|
0.030
|
0.030
|
450
|
535
|
17
|
|||||||
|
L485
|
0.23
|
1.60
|
0.030
|
0.030
|
485
|
570
|
16
|
|||||||
|
L555
|
0.18
|
1.80
|
0.030
|
0.030
|
555
|
625
|
15
|
|||||||
|
AP1 5L（PSL1）
|
|
|
|
|
|
(Timax)
|
Nb + V + Ti ≤ 0.15% Grade B Nb + V ≤ 0.03% Steel ≥ Grade B, (Niovium Vanadium Titanium or combinations maybe Usde but Nb + V + Ti ≤ 0.15%
|
|
-
|
|
-
|
|
Not required or can be selected impact energy and shear area of one or two toughness drama
|
|
|
