Standard
|
Product Level
|
Steel grade
|
Yield Strength (min), Mpa
|
Tensile Strength(MPa)
|
API 5L GB/T9711.2
|
PSL 1
|
A or L210
|
210
|
335
|
B or L245
|
245
|
415
|
||
x42 or L290
|
290
|
415
|
||
X46 or L320
|
320
|
435
|
||
X52 or L360
|
360
|
460
|
||
X56 or L390
|
390
|
490
|
||
X60 or L415
|
415
|
520
|
||
X70
|
483
|
565
|
||
PSL 2
|
BR or L245R
|
245~450
|
415~760
|
|
X42R or L290R
|
290~495
|
415~760
|
||
BN or L245N
|
245~450
|
415~760
|
||
X42N or L290N
|
290~495
|
415~760
|
||
X46N or L320N
|
320~525
|
435~760
|
||
X52N or L360N
|
360~530
|
460~760
|
||
X56N or L390N
|
390~545
|
490~760
|
||
X60N or L415N
|
415~565
|
520~760
|
||
X65N or L450N
|
425~566
|
525~760
|
||
X70 or L480
|
484~565
|
565~768
|
||
X80
|
552~690
|
621~827
|
roduct Level
|
Steel grade
|
Chemical composition, %
|
||||||||
C
|
Mn
|
P
|
S
|
Si
|
V
|
Nb
|
Ti
|
CEpcm
|
||
PSL 1
|
B or L245
|
≤0.28
|
≤1.20
|
≤0.030
|
≤0.030
|
-
|
-
|
-
|
-
|
-
|
x42 or L290
|
≤0.28
|
≤1.30
|
≤0.030
|
≤0.030
|
-
|
-
|
-
|
-
|
-
|
|
X46 or L320
|
≤0.28
|
≤1.40
|
≤0.030
|
≤0.030
|
-
|
-
|
-
|
-
|
-
|
|
X52 or L360
|
≤0.28
|
≤1.40
|
≤0.030
|
≤0.030
|
-
|
-
|
-
|
-
|
-
|
|
X56 or L390
|
≤0.28
|
≤1.40
|
≤0.030
|
≤0.030
|
-
|
-
|
-
|
-
|
-
|
|
X60 or L415
|
≤0.28
|
≤1.40
|
≤0.030
|
≤0.030
|
-
|
-
|
-
|
-
|
-
|
|
X70
|
≤0.28
|
≤1.40
|
≤0.030
|
≤0.030
|
-
|
-
|
-
|
-
|
-
|
|
PSL 2
|
BR or L245R
|
≤0.24
|
≤1.20
|
≤0.025
|
≤0.015
|
≤0.40
|
c
|
c
|
≤0.04
|
≤0.25
|
X42R or L290R
|
≤0.24
|
≤1.20
|
≤0.025
|
≤0.015
|
≤0.40
|
≤0.06
|
≤0.05
|
≤0.04
|
≤0.25
|
|
BN or L245N
|
≤0.24
|
≤1.20
|
≤0.025
|
≤0.015
|
≤0.40
|
c
|
c
|
≤0.04
|
≤0.25
|
|
X42N or L290N
|
≤0.24
|
≤1.30
|
≤0.025
|
≤0.015
|
≤0.40
|
≤0.06
|
≤0.05
|
≤0.04
|
≤0.25
|
|
X46N or L320N
|
≤0.24
|
≤1.40
|
≤0.025
|
≤0.015
|
≤0.40
|
≤0.07
|
≤0.05
|
≤0.04
|
≤0.25
|
|
X52N or L360N
|
≤0.24
|
≤1.40
|
≤0.025
|
≤0.015
|
≤0.45
|
≤0.10
|
≤0.05
|
≤0.04
|
≤0.25
|
|
X56N or L390N
|
≤0.24
|
≤1.40
|
≤0.025
|
≤0.015
|
≤0.45
|
≤0.10
|
≤0.05
|
≤0.04
|
≤0.25
|
|
X60N or L415N
|
≤0.24
|
≤1.40
|
≤0.025
|
≤0.015
|
≤0.45
|
≤0.10
|
≤0.05
|
≤0.04
|
-
|
|
X65N or L450N
|
≤0.24
|
≤1.40
|
≤0.025
|