Inconel 625 Capillary Tube (UNS N06625 / W.Nr. 2.4856)
High-strength corrosion-resistant Capillary Tube for marine and chemical processing
As a leading Inconel alloy supplier in China, SEATHER TECHNOLOGY produces and manufactures precision Inconel 625 capillary tubes engineered for high performance in demanding environments.
Inconel 625 (UNS N06625 / W.Nr. 2.4856) is a nickel-chromium-molybdenum alloy renowned for its exceptional strength, excellent weldability, and outstanding corrosion resistance. With reliable performance from cryogenic temperatures up to 1800°F (982°C), it is widely used in aerospace components, petrochemical instrumentation, marine engineering, and high-purity fluid systems.
Inconel 625 capillary tube is an ultra-small diameter alloy tube requiring higher precision and tighter control in the manufacturing process. It is produced from Inconel 625 coil tubing that is carefully straightened, cold-worked, and polished. These capillaries are ideal for applications where exceptional corrosion resistance and highly accurate internal dimensions are essential.
SEATHER offers both seamless Inconel 625 capillary tube and welded Inconel 625 capillary tube to meet different engineering requirements. During the surface finishing and polishing process, we provide multiple options including MP, EP, BA, AP, and other customizable treatments.
Our Inconel 625 capillary tubes feature:
- Smooth and uniform appearance
- Strictly controlled dimensional tolerances
- Stable mechanical properties and corrosion resistance
- Customizable sizes and finishes for specialized applications
Inconel 625 Capillary Tube (UNS N06625) Specifications & Srtandard
- OD Range: Φ0.1 – Φ6mm
- Wall Thickness: Φ0.01 – Φ2mm
- Length: 50mm – 30000mm
- 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: MP / EP / BA / AP Surface
- Brand: SEATHER TECHNOLOGY, Special Metals(SMC), HAYNES International, VDM Metals, ATI, etc.
Inconel 625 Capillary Tube (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 Capillary Tube (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 Capillary Tube (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 Capillary Tube (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 Capillary Tube (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 |
Metal Cutting Service
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CNC Machining Services
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Sheet Metal Fabrication
SEATHER’s custom sheet metal fabrication services offer a fast and cost-effective solution for your projects.
Metal Welding Service
Seather provides some of the best solutions ranging from custom metal welding and related services.
More Information About Inconel 625 Capillary Tube (UNS N06625)
When you choose to buy Inconel 625 Capillary Tube (UNS N06625), there have some important points we need to know before we get started.
Pitting resistance equivalency numbers (PREN) for Inconel 625 Capillary Tube
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 Capillary Tube (UNS N06625)
When purchasing alloy capillary 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 welded pipe 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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