Casing and Tubing for Arctic Service

CASING AND TUBING FOR ARCTIC SERVICE

Sumitomo SM-L grades are designed for high impact toughness at subzero temperatures as this is experienced in arctic regions.
These properties are achieved through tight material chemistry control and specific heat treatment.
The following Tables show tensile and impact toughness properties.

Characteristics

1. Material: Special steel is used in order to obtain sufficient resistance to low temperature impact.
2. Heat Treatment: Both casing and coupling are quenched and tempered with special care.
3. Impact Properties: (Example of SM-110LL)

Tensile Properties

Grade	Yield Strength		Tensile Strength min. psi (MPa)	Elongation min. % in 2 inches
Grade	min.psi (MPa)	max. psi (MPa)	Tensile Strength min. psi (MPa)	Elongation min. % in 2 inches
SM-80L SM-80LL	80,000 (552)	110,000 (758)	100,000 (689)	API Formula
SM-95L SM-95LL	95,000 (655)	125,000 (862)	105,000 (742)
SM-110L SM-110LL	110,000 (758)	140,000 (965)	125,000 (862)

Impact Properties (Charpy Impact Value)

Grade	Size of Specimen mm	Min. Average Value of Each Set of Three Specimens ft-lb (J)	Min. Value of One Specimen Only of a Set ft-lb (J)
SM-80L	10 by 10	20 (27)	15 (20)
SM-95L	10 by 7.5	15 (20)	11 (15)
SM-110L	10 by 5 10 by 2.5	10 (14) 5 (7)	8 (11) 4 (5)

Test temperature : –50 °F (– 46°C)

Grade	Size of Specimen mm	Min. Average Value of Each Set of Three Specimens ft-lb (J)	Min. Value of One Specimen Only of a Set ft-lb (J)
SM-80LL	10 by 10	23.1 (31)	15.4 (21)
SM-95LL	10 by 7.5	18.5 (25)	12.3 (17)
SM-110LL	10 by 5	12.7 (17)	8.5 (12)

Test temperature: – 67 ° F (–55 ° C)