标准
|
牌号
|
化学成分(%)
|
CEV(%)
|
|
|
|
|
|
|
|
C
|
Si
|
Mn
|
P
|
S
|
V
|
Nb
|
Ti
|
|
|
|
API SPEC 5L
GB/T9711.2
|
B
|
≤0.16
|
≤0.40
|
≤1.10
|
≤0.020
|
≤0.010
|
-
|
-
|
-
|
≤0.42
|
X42
|
≤0.17
|
≤0.40
|
≤1.20
|
≤0.020
|
≤0.010
|
≤0.05
|
≤0.05
|
≤0.04
|
≤0.42
|
|
X52
|
≤0.20
|
≤0.45
|
≤1.60
|
≤0.020
|
≤0.010
|
≤0.10
|
≤0.05
|
≤0.04
|
≤0.45
|
|
X60
|
≤0.21
|
≤0.45
|
≤1.60
|
≤0.020
|
≤0.010
|
≤0.15
|
≤0.05
|
≤0.04
|
协议
|
|
X65
|
≤0.16
|
≤0.45
|
≤1.60
|
≤0.020
|
≤0.010
|
≤0.06
|
≤0.05
|
≤0.06
|
≤0.45
|
|
X70
|
≤0.16
|
≤0.45
|
≤1.70
|
≤0.020
|
≤0.010
|
≤0.06
|
≤0.05
|
≤0.06
|
≤0.45
|
|
注:
1.0.015%≤Altot<0.06%;N≤0.012%;Al/N≥2/1;Cu≤0.25%;Ni≤0.30%;Cr≤0.30%;Mo≤0.10%
2.V+Nb+Ti≤0.15
3.X60、X65、X70经协商Mo≤0.35%