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API SPEC 5L????????????????
GB/T9711.2?????й???????
?????
?????????????????е???????????????
??????????????
B??X42??X52??X60??X65??X70

??繫??:
???????
???????D??
?????S??

????
????? (mm)
???????(mm)
?????(mm)
???????(mm)

 ??60.3??S??20
??0.75??
??73.0
??15??????12.5??

 ??60.3??S??20
??1.00??
??73.0??S??20
??15??????12.5??

   ??73.0??S??20
??17.5??????10

????????
???
???
????????MPa??
????????MPa??
?????
?????????
0??????
Akv??J??
???????

API SPEC 5L
GB/T9711.2
B
??415
245??440
??0.80
22
??40
????

 X42
??415
290??440
??0.80
21
??40
????

 X52
??460
360??510
??0.85
20
??40
????

 X60
??520
415??565
??0.85
18
??40
????

 <>TD width=46 bgColor=#ffffff>
X65
??535
450??570
??0.90
18
??40
??????

 X70
??570
485??605
??0.90
18
??40
??????

??????:
???
???
???????????
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
Э??

 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