Inconel-718-825-Fin tubes, Inconel 718/825 Fin Tube Manufacturer, Inconel 718/825 Fin Tube Supplier, Inconel 718/825 Fin Tube Exporter, Inconel 718/825 Precision Tubing, Inconel 718/825 Small Diameter Tube, Inconel 718/825 Fin Tubes
Inconel 718 and Inconel 825 finned tubes are premium-grade components used in heat exchangers, specially designed for high-performance thermal systems operating in harsh environments. These fin tubes are manufactured using high-nickel alloys, known for their outstanding mechanical strength, corrosion resistance, and stability at elevated temperatures. By incorporating external fins, these tubes provide an expanded surface area, significantly improving heat transfer efficiency in both air-cooled and fluid-based systems.
Inconel 718 is a precipitation-hardenable nickel-chromium alloy that offers exceptional tensile and fatigue strength, along with remarkable resistance to creep and rupture. It maintains its mechanical integrity at temperatures up to 700°C (1300°F), making it suitable for high-temperature applications such as gas turbines, jet engines, and nuclear reactors. Its resistance to oxidation and scaling further enhances its durability in demanding thermal cycles and aggressive atmospheres.
Inconel 718 is a precipitation-hardenable nickel-chromium alloy that offers exceptional tensile and fatigue strength, along with remarkable resistance to creep and rupture. It maintains its mechanical integrity at temperatures up to 700°C (1300°F), making it suitable for high-temperature applications such as gas turbines, jet engines, and nuclear reactors. Its resistance to oxidation and scaling further enhances its durability in demanding thermal cycles and aggressive atmospheres.
The fin tubes are available in various configurations, including L-type, LL-type, G-type, and extruded designs, depending on the application requirements. Fins can be integrally extruded from the tube or attached mechanically, depending on thermal and mechanical demands. Tube sizes typically range from 12mm to 50mm in outer diameter, with fin heights up to 16mm. These finned tubes can be customized for different pressure ratings, flow conditions, and operating temperatures.
Specification of Inconel-718-825-Fin tubes
| Specification | Inconel 718 Fin Tubes | Inconel 825 Fin Tubes |
|---|---|---|
| Material Grade | UNS N07718 | UNS N08825 |
| Standard Specification | ASTM B163 / B516 / B751 / B111 (finning related) | ASTM B163 / B423 / B705 |
| Manufacturing Process | Seamless / Welded + Finning | Seamless / Welded + Finning |
| Fin Types Available | L-type, LL-type, G-type, Extruded | L-type, LL-type, G-type, Extruded |
| Outer Diameter (Tube OD) | 12 mm – 50 mm (custom sizes available) | 12 mm – 50 mm (custom sizes available) |
| Wall Thickness | 0.7 mm – 3.0 mm | 0.7 mm – 3.0 mm |
| Fin Height | Up to 16 mm (standard 8–16 mm) | Up to 16 mm (standard 8–16 mm) |
| Fin Pitch (Fins per Inch) | 4 – 11 FPI (customizable) | 4 – 11 FPI (customizable) |
| Tube Length | Up to 20 meters or as per design | Up to 20 meters or as per design |
| Tensile Strength | ≥ 1380 MPa | ≥ 550 MPa |
| Yield Strength (0.2% offset) | ≥ 1035 MPa | ≥ 220 MPa |
| Elongation | ≥ 12% | ≥ 30% |
| Max Operating Temperature | ~700°C (1300°F) | ~540°C (1000°F) |
| Corrosion Resistance | Excellent (oxidation, high-temp gases) | Excellent (acids, seawater, stress cracking) |
| Applications | Aerospace, turbines, nuclear, high-temp heat exchangers | Oil & gas, chemical processing, marine condensers |
Inconel 718 and 825 finned tubes are widely used in industries such as aerospace, power generation, chemical refining, marine, and petrochemicals. Their superior heat transfer capability, coupled with excellent resistance to corrosion and high-temperature degradation, ensures long service life and reduced maintenance. These attributes make them ideal for mission-critical systems where reliability and performance are non-negotiable.
Chemical Composition of Inconel-718-825-Fin tubes
| Element | Inconel 718 (UNS N07718) | Inconel 825 (UNS N08825) |
|---|---|---|
| Nickel (Ni) | 50.0 – 55.0 | 38.0 – 46.0 |
| Chromium (Cr) | 17.0 – 21.0 | 19.5 – 23.5 |
| Iron (Fe) | Balance (~17%) | Balance (~22%) |
| Molybdenum (Mo) | 2.8 – 3.3 | 2.5 – 3.5 |
| Niobium (Nb) + Tantalum (Ta) | 4.75 – 5.50 | ≤ 0.6 |
| Titanium (Ti) | 0.65 – 1.15 | 0.6 – 1.2 |
| Aluminum (Al) | 0.20 – 0.80 | ≤ 0.2 |
| Cobalt (Co) | ≤ 1.0 | ≤ 1.0 |
| Manganese (Mn) | ≤ 0.35 | ≤ 1.0 |
| Silicon (Si) | ≤ 0.35 | ≤ 0.5 |
| Carbon (C) | ≤ 0.08 | ≤ 0.05 |
| Sulfur (S) | ≤ 0.015 | ≤ 0.03 |
| Copper (Cu) | ≤ 0.3 | 1.5 – 3.0 |
| Phosphorus (P) | — | ≤ 0.03 |
With a proven track record as a Inconel-718-825-Fin tubes exporter in over 30 countries, Sumer Metal Industries ensures global availability, third-party inspection support, and client-specific customization. Our wide export network combined with strict quality standards has made us a preferred choice for SS 718/825 tubing worldwide.
Specification of Inconel-718-825-Fin tubes
| Specification | Inconel 718 Fin Tubes | Inconel 825 Fin Tubes |
|---|---|---|
| Material Grade | UNS N07718 | UNS N08825 |
| Standard Specification | ASTM B163 / B516 / B751 / B111 (finning related) | ASTM B163 / B423 / B705 |
| Manufacturing Process | Seamless / Welded + Finning | Seamless / Welded + Finning |
| Fin Types Available | L-type, LL-type, G-type, Extruded | L-type, LL-type, G-type, Extruded |
| Outer Diameter (Tube OD) | 12 mm – 50 mm (custom sizes available) | 12 mm – 50 mm (custom sizes available) |
| Wall Thickness | 0.7 mm – 3.0 mm | 0.7 mm – 3.0 mm |
| Fin Height | Up to 16 mm (standard 8–16 mm) | Up to 16 mm (standard 8–16 mm) |
| Fin Pitch (Fins per Inch) | 4 – 11 FPI (customizable) | 4 – 11 FPI (customizable) |
| Tube Length | Up to 20 meters or as per design | Up to 20 meters or as per design |
| Tensile Strength | ≥ 1380 MPa | ≥ 550 MPa |
| Yield Strength (0.2% offset) | ≥ 1035 MPa | ≥ 220 MPa |
| Elongation | ≥ 12% | ≥ 30% |
| Max Operating Temperature | ~700°C (1300°F) | ~540°C (1000°F) |
| Corrosion Resistance | Excellent (oxidation, high-temp gases) | Excellent (acids, seawater, stress cracking) |
| Applications | Aerospace, turbines, nuclear, high-temp heat exchangers | Oil & gas, chemical processing, marine condensers |
🏭 Industry & Application
- ✅ Inconel 718/825 Fin Tubes for Medical Industry
- ✅ Inconel 718/825 Fin Tubes for Chemical Processing
- ✅ Inconel 718/825 Tubes for Fin Lines
- ✅ Inconel 718/825 Fin tubes for Gas & Liquid Flow
- ✅ Inconel 718/825 Tubes for Heat Exchangers
❓ Frequently Asked Questions (FAQs)
Q1:What are Inconel 718 and Inconel 825 fin tubes used for?
Inconel 718 and 825 finned tubes are used in high-performance heat exchangers where corrosion resistance, high-temperature strength, and efficient heat transfer are critical. Common applications include aerospace engines, chemical processing plants, power generation units, and offshore oil and gas installations.
Q2:What is the difference between Inconel 718 and Inconel 825?
Inconel 718 is a precipitation-hardened alloy with high tensile strength and excellent creep and fatigue resistance, ideal for high-temperature and high-pressure environments. Inconel 825 is a solid-solution-strengthened alloy with superior corrosion resistance, especially in acidic and marine environments, making it suitable for chemical and offshore applications.
Q3:Are these tubes suitable for seawater or acidic environments?
Yes. Inconel 825 is especially resistant to chloride-induced corrosion and acid attack, making it excellent for seawater-cooled condensers and acid recovery systems. Inconel 718 also offers good resistance but is better suited for high-strength thermal systems.
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At Sumer Metal Industries Pvt. Ltd., we follow a zero-defect policy by implementing stringent quality checks, using certified raw materials, and continuously improving our processes to deliver reliable and consistent tubing solutions
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