套管和油管用無縫鋼管
鋼管種類
|
外徑(D)
|
壁厚(S)
|
|
冷拔管
|
鋼管外徑(mm)
|
允許偏差(mm)
|
允許偏差(mm)
|
<114.3
|
±0.79
|
-12.50%
|
標準
|
牌號
|
抗拉強度
(MPa)
|
屈服強度
(MPa)
|
伸長率
(%)
|
硬度
|
API SPEC 5CT
|
J55
|
≥517
|
379~552
|
|
|
K55
|
≥517
|
≥655
|
|
||
N80
|
≥689
|
552~758
|
|
||
L80(13Cr)
|
≥655
|
552~655
|
≤241HB
|
||
P110
|
≥862
|
758~965
|
|
標準
|
牌號
|
化學成分
|
||||||||||
C
|
Si
|
Mn
|
P
|
S
|
Cr
|
Ni
|
Cu
|
Mo
|
V
|
Als
|
||
API SPEC 5CT
|
J55K55
|
0.34-0.39
|
0.20-0.35
|
1.25-1.50
|
≤0.020
|
≤0.015
|
≤0.15
|
≤0.20
|
≤0.20
|
|
|
≤0.020
|
(37Mn5)
|
||||||||||||
N80
|
0.34-0.38
|
0.20-0.35
|
1.45-1.70
|
≤0.020
|
≤0.015
|
≤0.15
|
|
|
|
0.11-0.16
|
≤0.020
|
|
(36Mn2V)
|
||||||||||||
L80(13Cr)
|
0.15-0.22
|
≤1.00
|
0.25-1.00
|
≤0.020
|
≤0.010
|
12.0-14.0
|
≤0.20
|
≤0.20
|
|
|
≤0.020
|
|
P110
|
0.26-0.35
|
0.17-0.37
|
0.40-0.70
|
≤0.020
|
≤0.010
|
0.80-1.10
|
≤0.20
|
≤0.20
|
0.15-0.25
|
≤0.08
|
|
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