Jiangsu Cunrui Metal Products Co., Ltd. is one of the leading manufacturers and suppliers of n80q steel casing pipe in China. We are committed to providing high quality customized products made in China with competitive price. Please feel free to buy cheap n80q steel casing pipe in stock here from our factory. Also, free sample is available.
Product Description
N80Q is a quenched and tempered grade carbon steel casing, widely selected for medium-depth oil and gas well construction. It balances high tensile strength, good impact toughness and reliable anti-collapse performance, stable under downhole pressure and complex geological conditions. Our N80Q casing strictly follows API 5CT standards, with precise dimensional control and full material traceability. Each batch undergoes PMI inspection, hydrostatic test and non-destructive testing to guarantee consistent quality for your drilling projects.
Stock & Available Specifications
We maintain steady stock of N80Q seamless casing, covering commonly requested sizes for oilfield projects. Custom lengths and threading options are available upon request.
| Item | Details |
|---|---|
| Product Grade | N80Q Oilfield Casing (API 5CT) |
| Stock OD Range | 114.3mm ~ 339.7mm |
| Wall Thickness | 6.2mm ~ 16mm |
| Standard Length | R1 / R2 / R3 (API 5CT standard range) |
| Thread Options | BTC, LTC, STC, fitted with plastic thread protectors |
| Surface & Packaging | Black painted body, red end guards, VCI anti-rust treatment, bundled with steel straps |
| Shipment | Standard sizes in stock for quick delivery; non-standard specifications on production lead time |
Key Product Features
Complies fully with API 5CT standard, with consistent mechanical properties after quenching and tempering heat treatment.
Great impact toughness and collapse resistance, helping stabilize wellbore under complex underground pressure.
Precisely machined API threads for secure connection between pipe sections.
Full batch inspection including PMI, hydrostatic test and NDT, complete material certificates available.
Chemical Composition (Typical, wt%)
| Element | Typical Range |
|---|---|
| C (Carbon) | 0.28 ~ 0.45 |
| Mn (Manganese) | 1.15 ~ 1.70 |
| Si (Silicon) | 0.20 ~ 0.35 |
| P (Phosphorus) | ≤0.025 |
| S (Sulfur) | ≤0.025 |
| Cr / Mo | Optional trace addition |
Note: API 5CT only limits impurity elements for N80Q. Carbon, Mn and alloying elements are factory-controlled to meet mechanical targets.
Mechanical Properties (API 5CT Standard)
| Property | Metric | Imperial |
|---|---|---|
| Yield Strength | 552 ~ 758 MPa | 80,000 ~ 110,000 psi |
| Minimum Tensile Strength | ≥689 MPa | ≥100,000 psi |
| Minimum Elongation | ≥16% (2-inch gauge length) | ≥16% |
| Heat Treatment | Quenched & Tempered (Q+T) | Quenched & Tempered (Q+T) |
Applications
Oil and gas well casing for onshore and offshore medium depth wells
Geothermal well construction
Underground water injection and gas storage wells
Shale gas exploration projects
N80Q casing delivers dependable mechanical performance to protect wellbore integrity and prevent collapse during long-term operation.
Our Company
Jiangsu Cunrui Metal Products Co., Ltd. is a professional metal supplier located in Wuxi, with mature supply chains and direct factory support. We maintain stable raw material inventory and flexible production scheduling, able to handle both bulk orders and small trial shipments. Our in-house QC team carries out full-range inspections before shipment, and we can provide EN 10204 3.1 material certificates to meet international compliance requirements.
FAQs
Q1: What is the difference between N80 and N80Q casing?
A1: N80Q is quenched and tempered, offering better toughness than N80 type 1. It performs better in wells with high stress and risk of cracking.
Q2: Can you supply API 5CT certification for N80Q pipe?
A2: Yes. All our N80Q casing comes with standard test reports and material certificates, and third-party PMI test is available upon your request.
Q3: What packaging options do you provide for export?
A3: We adopt VCI rust prevention treatment. Pipe ends are protected with plastic caps. Bundles use steel strapping, and IPPC wooden pallets are optional for sea shipment.
Q4: What is your lead time?
A4: For standard sizes, we have stock and can arrange shipment quickly. Custom threading or special lengths will need negotiated production lead time.
Q5: Do you accept sample orders?
A5: Sure, small samples for lab testing are available. We can arrange sample delivery together with formal quotation.
