API 5CT Casing & Tubing
Mechanical properties：
|
Standard |
Grade |
Tensile Strength（MPa） |
Yield Strength（MPa） |
|
API SPEC 5CT |
J55 |
≥517 |
379～552 |
|
K55 |
≥517 |
≥655 |
|
|
N80 |
≥689 |
552～758 |
|
|
L80(13Cr) |
≥655 |
552～655 |
|
|
P110 |
≥862 |
758～965 |
Chemical Composition：
|
Standard |
grade |
Chemical Composition（％） |
||||||||||
|
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Cu |
Mo |
V |
Als |
||
|
API SPEC 5CT |
J55K55 (37Mn5) |
0.34～0.39 |
0.20～0.35 |
1.25～1.50 |
≤0.020 |
≤0.015 |
≤0.15 |
≤0.20 |
≤0.20 |
/ |
/ |
≤0.020 |
|
N80 (36 Mn2V) |
0.34～0.38 |
0.20～0.35 |
1.45～1.70 |
≤0.020 |
≤0.015 |
≤0.15 |
/ |
/ |
/ |
0.11～0.16 |
≤0.020 |
|
|
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 (30CrMo) |
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 |
≤0.020 |
|
Dimensional Deviation:
|
Dimensional Deviation |
||
|
Items |
Allowable Deviation |
|
|
Out Diameter |
Pipe Body |
D≤101.60mm±0.79mm |
|
D≥114.30mm +1.0% |
||
|
-0.5% |
||
|
|
|
|
|
Wall Thickness |
-12.5% |
|
|
Weight |
Each Piece |
+6.5% |
|
+3.5% |
||
Length Range
|
Length |
|||
|
Item |
Scope 1 |
Scope 2 |
Scope 3 |
|
Tubing |
6.10-7.32m |
8.53-9.75m |
- |
|
Casing |
4.88-7.62m |
7.62-10.36m |
10.36-14.63m |
