Seamless Inconel 718 Pipe (UNS N07718) – High-Performance Nickel Alloy Solution
1. Overview of Seamless Inconel 718 Pipe
Seamless Inconel 718 pipe (UNS N07718) is a high-performance, precipitation-hardenable nickel-based superalloy pipe manufactured from a solid billet through a seamless process. Unlike welded pipes, it contains no weld seams, ensuring superior structural integrity, pressure resistance, and reliability in critical applications.
Designed for extreme environments, Inconel 718 maintains excellent mechanical properties across a wide temperature range—from cryogenic conditions up to 704°C—while offering outstanding resistance to oxidation and corrosion.
The alloy is strengthened by controlled additions of Niobium (Nb) and Molybdenum (Mo), enabling age-hardening heat treatment. This makes it a preferred material in aerospace, subsea oil & gas, and nuclear industries.
2. Key Features and Technical Advantages
- High Strength & Creep Resistance
Precipitation hardening provides exceptional tensile and yield strength, enabling thinner wall thickness and reduced system weight. - Excellent Corrosion Resistance
Superior resistance to chloride-induced stress corrosion cracking (SCC), pitting, and crevice corrosion, especially in sour service (H₂S) and marine environments. - Outstanding Thermal Stability
Retains mechanical properties from cryogenic temperatures up to 704°C, ideal for high-temperature applications such as gas turbines and aerospace systems. - Precision Manufacturing (ASTM B829)
Tight dimensional tolerances ensure excellent concentricity and wall thickness control for critical fluid systems. - Good Weldability
Compared to other precipitation-hardening alloys, Inconel 718 exhibits strong resistance to post-weld cracking.
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 strength and corrosion resistance.
Inconel 718 is specifically designed to maintain its strength and shape in high-stress, corrosive environments.
These physical properties highlight the material’s ability to perform reliably under a wide range of conditions.
Common Industrial Applications
Seamless Inconel 718 pipes are widely used in demanding industries requiring high strength and corrosion resistance:
Aerospace & Defense
Jet engine components, fuel lines, rocket engine systems
Oil & Gas (Upstream & Subsea)
Downhole tools, wellhead equipment, subsea control systems, sour gas service
Nuclear Power
Reactor components, high-strength fasteners, pressure systems
Chemical Processing
Heat exchangers, reactors, and piping systems handling aggressive media
Quality Assurance & Certification
We ensure full compliance with international standards and project requirements:
- Material Certification
EN 10204 3.1 / 3.2 Mill Test Certificate (MTC)
Full traceability from raw material to finished product - Non-Destructive Testing (NDT)
- PMI (Positive Material Identification)
- Ultrasonic Testing (UT)
- Eddy Current Testing (ET)
- Hydrostatic Testing (HT)
- Mechanical & Corrosion Testing
- Impact Test
- Flattening / Flaring Test
- Intergranular Corrosion (IGC)
- Dimensional & Surface Inspection
- Surface roughness control
- Precision OD/WT measurement
- Third-Party Inspection Available
ABS, DNV, BV, TÜV, Lloyd’s Register
