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You are here: Home- NewsAPI 5CT J55 oil field steel casing pipe

API 5CT J55 oil field steel casing pipe

Posted:2017/1/10 1:18:05

API 5CT J55 oil field steel casing pipe

 

API 5CT grade J55 steel pipe and tube is a kind of oil field steel casing pipe, with elongation rate of 0.5%, the yield strength range from 55 to 80ksi, and the minimum tensile strength of 75ksi,API 5CT grade J55 pipe and tube made by seamless and electric welding process.

 

API 5CT J55 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

 

 

API 5CT J55 Chemical compositions(%):

Standard codes

Models of steel tubes

C

Si

Mn

P

S

Cr

Ni

Cu

Mo

V

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

≤0.20

 

 

≤0.020

 

API 5CT J55 size range:
Outer Dimensions: 6.0mm – 219.0mm
Wall Thickness: 1.0mm – 30 mm
Length: max 12000mm

 

API 5CT J55 pipe manufacturing process:
Tubing made to API specs utilizes electric-weld or seamless procedures. Due to the fact that of the nature of the manufacturing, the cross section of the tubing wall location may be a little eccentric and the tubing slightly oval and not completely straight.

Electric-welded pipe has one longitudinal joint formed by electric-resistance or electric-induction welding without the addition of filler metal. The edges to be welded are pushed together mechanically, and the heat for welding is generated by the resistance to circulation of electric existing.

Both electric-weld and seamless procedures are appropriate for the majority of oil and gas services, but some choose seamless tubulars for sour service due to the fact that the electric-weld procedure might lead to a slightly different grain structure near the weld. Such differences are typically eliminated if the electric-weld tubing is heat-treated by the quenched-and-tempered process, which is necessary for API grades L80, P110, c90, and t95. Couplings usually are made from seamless tubular product of the same grade and type as the pipe.

 

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