JFE-125V
JFE-140V
Drilling of deep wells in excess of 15,000 feet and high-pressure gas wells is on the increase. P-110's burst pressure, collapse resistance and tension are not always sufficient for these applications. Therefore, JFE-125V casing and tubing and JFE-140V casing have been developed. Cr-Mo-Nb steel with excellent hardenability and high temperature resistance are used to make OCTG which have superb strength, toughness, and restricted variation of HRC.
Seamless, quenched and tempered
(wt %)
| Grade | C | Si max. |
Mn max. |
P max. |
S max. |
Nb max. |
Ni max. |
Cr | Mo | Nb max. |
|---|---|---|---|---|---|---|---|---|---|---|
| JFE-125V JFE-140V |
0.15~0.35 | 0.35 | 1.00 | 0.030 | 0.015 | 0.30 | 0.10 | 0.80~1.60 | 0.15~1.10 | 0.050 |
| Grade | Tensile Requirements | 2mm V Charpy Impact Requirements (casing only) | |||||
|---|---|---|---|---|---|---|---|
| Yield Strength ksi (MPa) |
Tensile Strength min. ksi (MPa) |
Elongation | Test Temperature |
Specimen | Minimum Average Absorbed Energy ft-lb (J) |
Minimum Individual Absorbed Energy ft-lb (J) |
|
| JFE-125V | 125~150 (862~1034) |
135 (931) | As Per API 5CT |
-4 °F (-20 °C) | 10x10 | 20 (27) | 15 (20) |
| JFE-140V | 140~170 (965~1171) |
150 (1034) | 10x7.5 | 16 (22) | 12 (16) | ||
Variation of HRC among three locations (O.D., Mid wall, I.D.) of one quadrant of a ring shall be as below.
| Wall thickness (inch) | Maximum Variation |
|---|---|
| JFE-125V, JFE-140V | |
| 0.500 or less | 3.0 |
| 0.501 to 0.749 | 4.0 |
| 0.750 and above | 5.0 |
