Steel Solution for Energy TOP
Steel Solution for EnergyOCTG > Material > Deep Well Service

Deep Well Service > Grade Table

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.

a. Specifications

(a) Process of Manufacture and Heat Treatment

Seamless, quenched and tempered

(b) Chemical Requirements

(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

(c) Physical Properties

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)

(d) Hardness Test on Casing and Coupling Stock

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

▲Return to Top

Privacy Statement | Terms and Conditions |