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Arctic Service > Grade Table

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.

a. Specifications

(a) Process of Manufacture and Heat Treatment

Seamless, quenched and tempered

(b) 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-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)

(c) Hardness Test (HRC) on JFE-125L Casing and Coupling Stock

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

b. Example of Physical Properties of JFE-125L Casing O.D. 5-1/2'' 0.725'' (139.7φ 18.42mm)

(a) HRC Variation

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

(b) 2mm Charpy Test Result

Specimen : full size (10 x 10)

(b) 2mm Charpy Test Result

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