JFE-80L
JFE-95L
JFE-110L
JFE-125L
Representing the casing and tubing to be used in frigid zones, this series is designed with increased resistance for low-temperature impact in order to withstand shock during delivery, handling, storage, make up, and running in frigid zones. Quenching and tempering is performed to ensure both high yield strength and good low-temperature toughness. Note that the Charpy impact test data of JFE-125L with heavy wall of 0.725 in. below show good results at – 50 F. Tensile test results and variation of HRC also show good properties.
Seamless, quenched and tempered
| 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-80L | 80~95 (552~655) |
95 (655) | As Per API 5CT |
-50 °F (-46 °C) |
10x10 | 25 (34) | 19 (26) |
| JFE-95L | 95~125 (655~862) |
110 (758) | |||||
| 10x7.5 | 20 (27) | 15 (20) | |||||
| JFE-110L | 110~140 (758~965) |
125 (862) | |||||
| 10x5 | 14 (19) | 10 (14) | |||||
| JFE-125L | 125~150 (862~1034) |
135 (931) | |||||
Variation of HRC among three locations (O.D., Mid wall, I.D.) of one quadrant of a ring from JFE-125L shall be as below.
| Wall thickness (inch) | Maximum Variation |
|---|---|
| 0.500 or less | 3.0 |
| 0.501 to 0.749 | 4.0 |
| 0.750 and above | 5.0 |
Measurements were made on four quadrants of one test ring.
 |
1 | 2 | 3 | 4 |
|---|---|---|---|---|
| Outside Mid Wall Inside |
31.3 31.2 31.6 |
30.5 31.3 31.6 |
30.7 31.2 31.7 |
30.8 31.5 31.5 |
| Variation | 0.3 | 1.1 | 1.0 | 0.7 |
Specimen : full size (10 x 10)
