High-Performance Seamless Inconel 718 (UNS N07718) Tube | ASTM B829 Nickel Alloy Pipe
What is a Seamless Inconel 718 Tube?
ASeamless Inconel 718 tube (UNS N07718) is a high-performance nickel-chromium-iron superalloy pipe manufactured from a solid billet without any welding seams.
Compared to welded tubes, seamless Inconel 718 tubingoffers:
- Superior structural integrity
- Enhanced pressure resistance
- Zero weld-related failure risk
This makes it ideal for high-temperature, high-pressure, and corrosive environments.
Inconel 718 is a precipitation-hardened nickel alloy known for its excellent tensile strength, creep resistance, and rupture strength at temperatures up to 1300°F (704°C).
Key Advantages of Inconel 718 Seamless Tubes
1. High-Temperature Strength
Maintains excellent mechanical properties from cryogenic temperatures to 704°C (1300°F), making it suitable for extreme thermal environments.
2. Superior Corrosion Resistance
- Resistant to oxidation and scaling
- Excellent resistance to stress corrosion cracking (SCC)
- Performs reliably in acidic and H₂S (sour gas) environments
3. High Pressure Capability
Manufactured in accordance with ASTM B829, enabling higher allowable pressure ratings for oil & gas and hydraulic systems.
4. Excellent Fatigue Resistance
Ideal for applications involving cyclic loads, vibration, and dynamic stress.
Product Specifications and Data
To provide a comprehensive overview of this high-performance material, here are the detailed technical specifications and performance data for Inconel 718.
The composition of Inconel 718 is carefully balanced to achieve its superior high-temperature strength and corrosion resistance.
Inconel 718 is specifically designed to maintain its strength and shape in high-stress, high-temperature environments.
These physical properties highlight the material’s ability to perform reliably under a wide range of conditions.
The Standard of Seamless Nickel Alloy Tube or Pipe ASTM B829 Size Tolerance Chart (mm)
Common Industrial Applications
The unique electrochemical profile of Nickel 200 seamless tubes makes them indispensable in several high-purity sectors:
Aerospace Industry
- Jet engine components
- Rocket motors
- High-temperature fasteners
Power Generation
- Gas turbines
- Nuclear reactor systems
Oil & Gas (HPHT Applications)
- Downhole tubing
- Wellhead components
- Subsea valves
Cryogenic Systems
- LNG storage
- Low-temperature piping
Manufacturing Process of Seamless Inconel 718 Tubes
1. Billet Preparation
High-purity Inconel 718 billets are heated to optimal forging temperatures.
2. Hot Extrusion
Formation of hollow mother tubes with uniform grain structure.
3. Cold Drawing / Pilgering
Precision control of outer diameter (OD)andwall thickness (WT).
4. Heat Treatment
Solution annealing followed by age hardening to form strengthening γ″ phase.
5. Quality Inspection
- 100% Eddy Current Testing (ECT)
- Ultrasonic Testing (UT)
- Hydrostatic Testing
Why Choose Our Inconel 718 Seamless Pipes?
- Manufactured according to ASTM B829 / ASME standards
- Suitable for marine, offshore, and aerospace applications
- Available with third-party inspection (e.g., ABS, PED)
- Full traceability and high-performance reliability
