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Product Description

API 5CT Steel Pipe Description

API 5CT is a standard technical specification of steel pipes for casing and tubing in oil or gas industries. It can be used in oil or gas drilling and conveying. Commonly used oilfield API-5CT casing steel grades are J55, K55, N80-1, N80Q, P110. Casings are mostly used in oil well drilling. According to the API-5CT standard, pipes can be divided into STC (short thread), LTC (long thread) and BTC (support thread) and their joints.


Product Parameters

Product Name

API 5CT Steel Pipe

Standard

EN/DIN/JIS/ASTM/BS/ASME/AISI etc.

Outer Diameter

Seamless: 1/4"-36"

Welding: 21.3mm-3620mm

Round Tube: 1/2"-10"

Square Tube/Rectangular Tube: 15x15mm-400x600mm

Wall Thickness

Seamless: 1.25mm-50mm

Welding: 1.65mm-65mm

Length

3-12 meters, Support customization

Surface Process

Bright, Polished, Black

Other Services

Machining(cnc), Centerless Grinding(cg), Heat Treatment, Annealing, Pickling, Polishing, Rolling, Forging, Cutting, Bending, Small Machining, etc.

 

Chemical Composition

Grade

C ≤

Si ≤

Mn ≤

P ≤

S ≤

Cr ≤

Ni ≤

With

V ≤

Als ≤

API 5CT J55

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 K55

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 N80

0.34-0.38

0.20-0.35

1.45-1.70

0.020

0.015

0.15

/

/

0.11-0.16

0.020

API 5CT L80

0.15-0.22

1.00

0.25-1.00

0.020

0.010

12.0-14.0

0.20

0.20

/

0.020

API 5CT J P110

0.26-035

0.17-0.37

0.40-0.70

0.020

0.010

0.80-1.10

0.20

0.20

0.08

0.020

 

Mechanical Properties

Grade

Yield Strength (Mpa)

Tensile Strength (Mpa)

API 5CT  J55

379-552

≥ 517

API 5CT  K55

≥ 655

≥ 517

API 5CT  N80

552-758

≥ 689

API 5CT  L80

552-655

≥ 655

API 5CT  P110

758-965

≥ 862

 

Scope of Application

API 5CT oil casing is mainly used to transport oil, natural gas, coal gas, water and other liquids, gases.

Product Application

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Packaging and shipping

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Factory Display

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FAQ

Q1: What products does Jiuhe Steel mainly offer?
Jiuhe Steel specializes in carbon steel, stainless steel, copper, aluminum, color-coated and galvanized products. Our portfolio includes carbon steel coils/plates/pipes/sections, stainless steel coils/pipes/bars, copper plates/strips/pipes, aluminum plates/coils/profiles, pre-painted galvanized coils/roofing sheets, and galvanized coils/pipes/sections.


Q2: What standards do your products comply with?
We can supply products in accordance with various international standards, including GB/T (Chinese standard), ASTM (American standard), JIS (Japanese standard), EN (European standard), and others. We recommend that clients specify their required standards and grades, and we will arrange production accordingly. If you are unsure about the appropriate standard, our team can assist with standard comparison and material selection.


Q3: Do you offer customized products?
Yes. We provide customized steel and non-ferrous metal solutions based on specific project requirements, including special dimensions, materials, surface treatments, and more. Please send us your technical specifications or drawings, and we will offer professional advice and quotations.

 

Q4: How do you ensure product quality?
We maintain long-term partnerships with reputable domestic mills and processing plants, with strict quality control systems in place. All products are accompanied by quality inspection certificates issued by the manufacturer. Upon request, we can also arrange third-party inspection by agencies such as SGS or BV.


Q5: Do you provide Mill Test Certificates (MTC)?
Yes. We provide Mill Test Certificates (MTC) for each shipment, including product name, specifications, applicable standards, chemical composition, mechanical properties, test results, date of manufacture, and the manufacturer‘s official stamp.

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