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Petroleum Casing Pipe


 

Product Name

Material

Standard

Specification

Application

Petroleum

 casing pipe

J55  K55  N80  L80
C90  C95  P110

API SPEC 5CT
ISO11960

∮60.23-508.00
*4.24-16.13

Apply to extract oil and gas

 

Chemical composition：


Steel grade

Chemical composition( % )

C

Si

Mn

P

S

Cr

Ni

Cu

Mo

V

J55K55(37Mn5)

0.34~0.39

0.20~0.35

1.25~1.50

≤0.020

≤0.015

≤0.15

≤0.20

≤0.20

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


Mechanical property and hardness requirement:


Group

Steel grade

Type

Total elongation%

Yield strength MPa

Tensile strength
Min
MPa

Hardness a
Max

Nominal thickness
mm

Change of hardness b
HRC

min

max

HRC

HBW

1

2

3

4

5

6

7

8

9

10

11

1

H40

-

0.5

276

552

414

-

-

-

-

J55

-

0.5

379

552

517

-

-

-

-

K55

-

0.5

379

552

655

-

-

-

-

N80

1

0.5

552

758

689

-

-

-

-

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