L485M管线钢管 是用于石油、天然气工业中的氧、水、油输送管的管道。L485管线钢管相当于X70管线钢管牌号

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%