API 5CT OCTG

API 5CT is your go-to standard for high-quality OCTGs, ensuring that you receive the best in casing, tubing, and pup joints. We offer you a range of options tailored to your project’s specific needs. Whether you are looking for pipes with specific heat treatment, suitable for drilling in challenging environments, or with threaded connections for easy installation, our API 5CT OCTGs provide versatile solutions. From the oil and gas sector to water transport, our API 5CT steel pipes are designed to meet rigorous technical requirements, providing you with a durable and reliable solution for your industrial applications.

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When you choose our API 5CT steel pipes, you’re investing in a product that comes with comprehensive specifications, including dimensions that meet international standards, state-of-the-art production procedures, and a variety of steel grades. The steel grades we offer cater to specific requirements, providing options like extreme line casing, integral joint tubing, and external upset tubing. Whether you need pipes with long round thread casing or short round thread casing, our diverse range of specifications meets the demands of different industries. Our pipes undergo rigorous surface coatings to resist corrosion, and we offer multiple end types and joint methods to suit your project. Additionally, our machining services ensure that your pipes are ready for immediate installation, saving you time and resources.

Steel Grades in API 5CT

We offer a diverse range of steel grades, including H40, J55, K55, N80, L80, C90, R95, T95, P110, C110, and Q125, to meet the unique demands of your projects. Each grade comes with its own set of benefits, from high tensile strength to exceptional corrosion resistance. When you choose our API 5CT steel pipes, you’re not just getting a product; you’re getting a customized solution that elevates your project’s quality and efficiency.

H40
J55
N80
L80

Available Categories

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Typical specification data

Technical reference

Final chemical, mechanical properties, dimensions and tolerances are confirmed against the governing specification and purchase order.

Chemical Requirements of API 5CT

Grade	Type	C min	C max	MN min	MN max	Mo min	Mo max	Cr min	Cr max	Ni max	Cu max	P max	S max	Si max
H40	–	–	–	–	–	–	–	–	–	–	–	–	0.030	–
J55	–	–	–	–	–	–	–	–	–	–	–	–	0.030	–
N80	–	1	–	–	–	–	–	–	–	–	–	0.030	0.030	–
N80	–	Q	–	–	–	–	–	–	–	–	–	0.030	0.030	–
L80	1	–	0.43a	–	1.9	–	–	–	–	0.25	0.35	0.030	0.030	0.45
L80	9Cr	–	0.15	0.30	0.60	0.9	01.10	8.00	10.0	0.50	0.25	0.020	0.030	1.00

Mechanical Requirements of API 5CT

Grade	Type	Total Elongation Under Load	Yield Strength Mpa min	max	Tensil strength MPa min	Hardness a,c max Hrc	HBW	Specified Wall Thickness mm	Allowable Hardness Variation b HRC
H40	–	0.5	276	552	414	–	–	–	–
J55	–	0.5	379	552	517	–	–	–	–
N80	1	0.5	552	758	689	–	–	–	–
N80	Q	0.5	552	758	689	–	–	–	–
L80	1	0.5	552	655	655	23.0	241	–	–
L80	9Cr	0.5	552	655	655	23.0	241	–	–
L80	13Cr	0.5	552	655	655	23.0	241	–	–

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