Oil Steel Pipe
API 5CT N80 casing pipe covers N80-1 and N80Q types. N80-1 and N80Q steel have same chemical composition and mechanical attributes, and their difference lies in the heat treatment. N80-1 steel is normalized and tempered, while N80Q steel is quenched and tempered. So N80Q steel has higher collapsing strength and internal pressure strength than N80-1 steel. When API 5CT N80 casing pipe is selected, the designer should clearly show N80-1 or N80Q.
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◉ Product Description

API 5CT N80 casing pipe chemical composition:
GradeCSiMnPSCrNiCuMoV
N800.34-0.380.20-0.351.45-1.70≤0.020≤0.015≤0.15///0.11-0.16

API 5CT N80 casing pipe mechanical properties:

GradeTypeTotal elongationunder load %Yield strength MPaTensile strength min. MPa
min.max .
N8010.5552758689
N80Q0.5552758689

API 5CT N80 casing pipe specification:
Thread type: SC (Short round thread), LC (Long round thread), BC (Buttress thread)
Length: R1 (4.88-7.62m), R2 (7.62-10.36m), R3 (10.36-14.63m)

Outer  DiameterWall ThicknessWeightThreadedLength
inmmkg/mlb/ft
4 1/2″114.314.14-22.479.50-11.50LTC/STC/BTCR1/R2/R3
5″12717.11-35.8611.50-24.10LTC/STC/BTCR1/R2/R3
5 1/2″139.720.83-34.2314.00-23.00LTC/STC/BTCR1/R2/R3
6 5/8″168.2829.76-35.7220.00-24.00LTC/STC/BTCR1/R2/R3
7″177.825.30-56.5517.00-38.00LTC/STC/BTCR1/R2/R3
7 5/8″193.6835.72-63.6924.00-42.80LTC/STC/BTCR1/R2/R3
8 5/8″219.0835.72-72.9224.00-49.00LTC/STC/BTCR1/R2/R3
9 5/8″244.4848.07-86.9132.30-58.40LTC/STC/BTCR1/R2/R3
10 3/4″273.0548.73-97.7732.75-65.70LTC/STC/BTCR1/R2/R3
11 3/4″298.4562.50-89.2942.00-60.00LTC/STC/BTCR1/R2/R3
13 3/8″339.7271.43-107.1548.00-72.00LTC/STC/BTCR1/R2/R3

◉ Product Show

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◉ Packaging and Transportation

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◉ FAQ

Q: What are your company's main products?

A: We are professional in carbon steel/stainless steel/galvanized steel sheets, pipes, coils and bars etc. We can also provide a wide range of steel products.

Q: How long is your delivery time?

A: For stock, we can deliver goods within 1-5 days. For customized sizes, it usually takes 7-20 days.

Q: Do you provide samples ? is it free?

A: We can provide samples for free, but freight will be paid by customers.

Q: Do you have stock for regular specification?

A: We have enough stock and can deliver in short time for these sizes.

Q: How can you guarantee the quality?

A: We can take pictures or videos as your request, or you can entrust a thirty party to inspect.

Q: Can we have a trial order with small quantity?

A: Yes, you can. We welcome any orders, even a sample.

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