Inconel 625 Coiled Tubing (UNS N06625 / W.Nr. 2.4856)
High-strength corrosion-resistant Coil Tube for marine and chemical processing
As a leading Inconel tubing supplier, SEATHER manufactures and supplies high-quality, customizable Inconel 625 coiled tubing tailored for demanding applications.
Inconel 625 (UNS N06625 / W.Nr. 2.4856) is a nickel-chromium-molybdenum alloy widely recognized for its exceptional strength, outstanding corrosion resistance, and excellent fabricability. It performs reliably from cryogenic temperatures up to 1800°F (982°C), making it ideal for aerospace, chemical processing, marine systems, and oil & gas applications.
Inconel 625 coiled tubing is a continuous small-diameter tube produced by welding, continuous cold drawing, and precision coiling of Inconel 625 strip. To ensure a clean, oxide-free inner wall, we apply a bright annealing process, which improves surface quality and ensures stable corrosion resistance throughout the entire length of the coil.
The tubing features excellent high-temperature resistance, strong corrosion resistance in both oxidizing and reducing media, and superior structural integrity suitable for instrumentation and fluid control systems.
SEATHER offers both seamless Inconel 625 coiled tubing and welded Inconel 625 coiled tubing. Due to technological differences, seamless coils of the same size are typically shorter than welded coils—please confirm length and specifications with us when placing an order.
Our Inconel 625 coiled tubing provides:
- Smooth, bright, and clean internal surfaces
- Tight dimensional tolerances and stable quality
- Excellent high-temperature and corrosion resistance
- Custom sizes, lengths, and surface finishes available
Inconel 625 Coiled Tubing (UNS N06625) Specifications & Srtandard
- OD Range: Φ0.4 – Φ16mm
- Wall Thickness: Φ0.1 – Φ3mm
- Length: Length: 150m, 1500m, 1800m or customized
- Customized size needs to be confirmed with our team
- Grades: 625 / UNS N06625 / W.Nr. 2.4856
- Standards: ASTM B444
ASTM B829
ASTM B704
ASTM B751
ASME SB 444
ASME SB 829
ASME SB 704 - Finish: Acid washing, polishing, and brightening
- Brand: SEATHER TECHNOLOGY, Special Metals(SMC), HAYNES International, VDM Metals, ATI, etc.
Inconel 625 Coiled Tubing (UNS N06625) Applications & Usages
- Aircraft ducting and exhaust systems
- Engine thrust-reverser systems
- Turbine shroud rings
- Bellows, expansion joints
- Gaskets and damper seals
- Motorsport exhaust and clamps
- Weld overlay and spacers for heat recovery systems
- Furnace muffles
- Valve seats and components
Inconel 625 Coiled Tubing (UNS N06625) Drawing & Formula
Formula: m = (OD – THK) × THK (mm) × L (m) × ρ (g/cm³) × π ÷ 1000
OD = Outside Diameter, THK = Wall Thickness, L = Length
ρ = Density, π = 3.1415926…
What is Inconel 625 (UNS N06625)
Nickel alloy 625 is widely used in marine applications due to its outstanding corrosion resistance. Its ability to withstand localized corrosion (pitting and crevice corrosion), chloride ion stress corrosion, and its excellent fatigue strength make it ideal for marine components such as propeller blades, exhaust systems, and fasteners.
Additionally, alloy 625 is extensively employed in the aerospace industry for its superior high-temperature tensile properties and creep strength. It is commonly used in aircraft piping systems, engine exhausts, fuel and hydraulic lines, and heat exchanger tubes. Its high-temperature resistance also makes it valuable in heat treatment equipment and the chemical industry.
Inconel 625 Coiled Tubing (UNS N06625) Chemical Composition
| Grade | Standard | C | Si | Mn | P | S | Cr | Ni | Mo |
| 625 | ASTM B443 | ≤0.1 | ≤0.50 | ≤0.50 | ≤0.015 | ≤0.015 | 20.00-23.00 | ≥58.0 | 8.0-10.0 |
Inconel 625 Coiled Tubing (UNS N06625) Mechanical Properties
| Element | Yield Strength (0.2%Offset) | Melting Point | Density | Tensile Strength | Elongation |
| 625 | MPa – 276 | 1350 °C (2460 °F) | 8.44 g/cm3 | MPa – 690 | Min 30 % |
Inconel 625 Coiled Tubing (UNS N06625) Physical Properties
| Melting Range | Specific Heat, 20°C (J/(g.K)) | Magnetic Permeability (20°C) | Thermal Conductivity, 20°C (W/(m.K)) | Curie Temperature (°C) |
| 1350 °C (2460 °F) | 410 | ＜1.001 | 9.9 | -196 |
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More Information About Inconel 625 Coiled Tubing
When you choose to buy Inconel 625 Coil Tube (UNS N06625), there have some important points we need to know before we get started.
Pitting resistance equivalency numbers (PREN) for Inconel 625 Coiled Tubing
Inconel 625 PREN: 40.8
The pitting resistance equivalency number uses the alloy’s chemical makeup to guess its power against pitting corrosion. You check how much chromium, molybdenum, tungsten, and nitrogen are in the alloy. These elements help keep the steel safe. The most used formula is:
PREN = CR% + 3.3 x (MO% + 0.5 x W%) + 16 x N%How to Purchase Inconel 625 Coiled Tubing (UNS N06625)
When purchasing alloy coil tube, it’s essential to have the right materials and information to ensure a smooth procurement process and to get the products that meet your needs.
Here’s what you need to provide:
1. Material: Specify the grade material, Alloy 625
2. Size: Specify the Outer Diameter, Inner Diameter, Wall thickness, Length, Delivery State, finish, etc.
3. Quantity: Provide the exact number of products required for an accurate quotation.
4. Technical specifications: Include technical specifications and drawings. If there are unique design requirements, detailed drawings can be attached.
5. Quality standards: Specify quality standards and inspection requirements, such as the need for third-party inspection, material certification, and inspection reports.
6. Special requirements: Specify any special surface treatment, polishing, corrosion resistance requirements, etc.
7. Packaging requirements: If there are specific packaging needs, such as protective or anti-corrosion packaging, please specify.
8. Delivery time: Specify the expected delivery time and location.
By preparing the above information, you can streamline the process of purchasing alloys and ensure that you receive high-quality products that meet your requirements.
Conclusion
We have introduced our products briefly. If you want to know more about it, you can check the article here Inconel Alloy 625: Composition, Properties and Applications.
If you need to purchase alloy coil tube, please get in touch with us immediately.
Trademark Notices:
Inconel®, Incoloy®, and Monel® are registered trademarks of Special Metals Corporation.
Hastelloy® is a registered trademark name of Haynes International, Inc.
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