Shipbuilding
|
Sizes 1.315"- 20" 48.26mm - 508mm |
|
Weight 9.5 lb/ft to 169 lb/ft 9.5 ppf to 169 ppf |
|
Length 3.0m-18m R1, R2, R3
|
|
Grades K55, J55, P110 L80, N80 |
|
Tolerance
|
Types of steel tubes |
Tolerance of Outer Diameter |
Tolerance of Wall Thickness |
|
|
Cold-rolled tubes |
Tube sizes(mm) |
Tolerances(mm) |
Tolerances(mm) |
|
＜114.3 |
±0.79 |
－12.5％ |
|
|
≥114.3 |
－0.5％，＋1％ |
||
Chemical compositions
Standard
Grade
Chemical compositions（％）
API SPEC 5CT
J55
C
Si
Mn
P
S
Cr
Ni
Cu
Mo
V
K55
0.34～0.39
0.20～0.35
1.25～1.50
≤0.020
≤0.015
≤0.15
≤0.20
≤0.20
/
/
N80
0.34～0.38
0.20～0.35
1.45～1.70
≤0.020
≤0.015
≤0.15
/
/
/
0.11～0.16
L80
0.15～0.22
≤1.00
0.25～1.00
≤0.020
≤0.010
12.0～14.0
≤0.20
≤0.20
/
/
P110
0.26～0.395
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
Mechanical properties
| Grade | Type |
Total elongation under load (%) |
Yield strength (min) |
Yield strength (max) |
Tensile strength min Mpa |
Hardness Max (HRC) |
Hardness Max (HBW) |
| J55 | - |
0.5 |
379 | 552 | 517 | - | - |
| K55 | - |
0.5 |
379 | 552 | 655 | - | - |
| N80 | 1 |
0.5 |
552 | 758 | 689 | - | - |
| N80 | Q |
0.5 |
552 | 758 | 689 | - | - |
| L80 | 1 |
0.5 |
552 | 655 | 655 | 23 | 241 |
|
L80 |
9Cr |
0.5 |
552 | 655 | 655 | 23 | 241 |
|
L80 |
13Cr |
0.5 |
552 | 655 | 655 | 23 | 241 |
| C90 | - |
0.5 |
621 | 724 | 689 | 25.4 | 255 |
| C95 | - |
0.5 |
655 | 758 | 724 | - | - |
| T95 | - | 0.5 | 655 | 758 | 724 | 25.4 | 255 |
| P110 | - | 0.6 | 758 | 965 | 862 | - | - |
| Q125 | All | 0.65 | 862 | 1034 | 931 | - | - |
|
UAE
K-55,N80 13-3/8", 68 ppf SMLS, BTC, R3 9-5/8", 47 ppf SMLS, BTC, R3 9560 meters |
|
Nigeria
N80 9-5/8" 47lb/ft R1 105000 feet(project) |
|
|
|
Jordan
H- 40 14" O.D,45.61 Ib/ft, Range II, wt:0,312" 2700 meters |
|
Vietnam
J55, 13 3/8" #54.5 PPF, BTC, R3, 4000MTRS 9 5/8", #36PPF, BTC, R3, 2000MTRS |
|
Oman
K55 10 3/4", 40.5 PPF, 12 meters length, Qty 155 pcs 8 5/8" K55 32 PPF, 12 meters length, Qty 270 pcs |
|
Irap
P110 9-7/8", 62.8ppf Vam Top Thread Range3 14000 Feet 7" 29ppf,+/-40ft,Vam Top Range 3 3000 Feet |
|
