API 5CT N80 Oil and Gas Casing Pipe, OD 177.8mm,WT9.19mm casing tube

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n80 oil casing seamless steel pipe

The N80 oil and gas API casing pipe includes N80-1 and N80-Q types. These 2 products are consistent in the chemical structure and mechanical residential or commercial properties, and are simply different in the heat treatment. This type of item is commonly utilized in the oil drilling process.

As its mechanical homes are greater than J55 and K55 types, it can be used to some a little more complex developments. With much deeper downhole depth than J55 and K55 types, it can be utilized for the exploitation of middle-level oil and gas. Due to the high efficiency of N80 material, this API casing pipe is thoroughly used in gas and coal bed methane extraction, along with geothermal wells.

Mechanical Properties：

Standard codes	Models of steel tubes	Tensite strength（MPa）	Yield strength（MPa）	Elongation（％）	Hardness
API SPEC 5CT	J55	≥517	379～552	check the table
	K55	≥517	≥655
	N80	≥689	552～758
	L80(13Cr)	≥655	552～655		≤241HB
	P110	≥862	758～965

Chemical Composition:

Standard codes

Models of steel tubes

Chemical compositions（％）

Als

API SPEC 5CT

J55K55 (37Mn5)

0.34～0.39

0.20～0.35

1.25～1.50

≤0.020

≤0.015

≤0.15

≤0.20

≤0.020

N80 (36 Mn2V)

0.34～0.38

0.20～0.35

1.45～1.70

≤0.020

≤0.015

≤0.15

0.11～0.16

≤0.020

L80(13Cr)

0.15～0.22

≤1.00

0.25～1.00

≤0.020

≤0.010

12.0～14.0

≤0.20

≤0.020

P110 (30CrMo)

0.26～0.35

0.17～0.37

0.40～0.70

≤0.020

≤0.010

0.80～1.10

≤0.20

0.15～0.25

≤0.08

≤0.020

Specifications of API 5CT N80 Oil and Gas Casing Pipe

Material	N80, steel grade
Outer Diameter	4 1/2″-20″, (114.3-508mm)
Wall Thickness	5.12-16.13mm
Form of Thread	Buttress thread casing, Long round thread casing, Short round thread casing
Function	It can protect the tubing pipe.