Yes, PMI testing is required for Inconel 718 tubes. This test is an important quality control step that verifies the material's exact chemical composition, ensuring that the alloy delivered is the correct nickel-chromium-iron alloy UNS N07718 rather than an inferior or wrong grade.
ASTM B983 Inconel 718 Seamless Tube Manufacturer
We, Xintongda Special Steel (XTD), manufacture Inconel 718 seamless tubes for demanding environments where high strength, corrosion resistance and dimensional accuracy are important. It is made from a nickel-chromium-iron alloy strengthened with molybdenum, niobium and titanium. We produce these tubes in accordance with ASTM B983 and ASME standards. Our tubes are manufactured without any welded joints through controlled extrusion, rotary piercing or hot rolling to ensure consistent and tight-tolerance shapes. Inconel 718 has high fracture resistance, consistent performance at temperatures up to 1300°F, and oxidation resistance to 1800°F. The ability of this material to withstand pitting, acidic media, alkaline conditions, and erosion makes it ideal for aerospace, energy, oil, gas and chemical processing applications. Our tubes are polished, pickled or as-rolled in both imperial and metric specifications. We have an annual production capacity of 25,000 tons and provide certificates that support global quality requirements. We supply DIN 2.4668 tubes with short lead times for stocked items and flexible MOQ options.
Key specifications of inconel 718 seamless tubes:
Standard ASTM B983
OD Range 6–257 mm
Thickness 1-35 mm
Length ≤ 22 m
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Technical Data
Technical Data
Inconel 718 Nickel Alloy Tube Manufacturing Process
Our Inconel 718 seamless nickel alloy tubes are manufactured using processes such as extrusion, rotary piercing, and controlled hot rolling, resulting in a continuous hollow shape with no welded joints. The tube undergoes several treatments. It is solution-treated, aged, sized to tight tolerances, and finished with either polished, pickled, or as-rolled surfaces to ensure precise mechanical performance. Click here for full information on the manufacturing process.
Benefits of Alloy 718 Seamless Tube
The inherent properties of alloy 718 tube provide significant operating advantages in various high-stress applications. The material provides unique advantages, specifically addressing the challenges of harsh working conditions.
- Long Service Life: The material's strength, combined with metallurgical stability, enables it to resist failure over extended service durations.
- Low Maintenance: The outstanding resistance to degradation significantly reduces the need for regular inspection, repair, or replacement.
- High Reliability: Consistent mechanical properties, including superior fracture resistance at temperatures up to 1300°F, ensure reliable performance under critical operating conditions.
- Strong Corrosion Resistance: These tubes offer excellent corrosion resistance against oxidation, acids, and alkaline environments.
- Enhanced safety: This seamless construction and high hardness provide a more stable and leak-resistant tube. This is crucial for handling volatile media in critical tube applications.
Inconel 718 Tube Equivalent Material
We supply Inconel 718 tubes with internationally recognised designations to meet the global specifications. The key identifications of this grade include UNS N07718 and DIN 2.4668. It is also known for high strength, pitting resistance and fracture toughness under extreme service conditions.
| GRADE | UNS | GB | JIS | ISO | DIN/EN | GOST | |
| ISC | NEW | ||||||
| Inconel 718 | N07718 | / | GH4169 | NCF718 | / | 2.4668 | / |
100% Certified Testing & Documentation
- EN 10204 3.1 and EN 10204 3.2 Material Test Certificates (MTC)
- Raw Materials Certificate
- 100% PMI
- Heat Treatment Charts
- Third-Party Inspection Report
- Surface roughness and size measurement
- Manufacturer Test Certificate (Impact Testing, Flattening, Flare, Bend, Hardness, Intergranular, Pitting Corrosion, Grain size, ET, UT, HT)
- Laboratory Test Certificate from the Government-Approved Lab
Application of Inconel 718 Seamless Tube
UNS N07718 Inconel 718 seamless tubes are essential for extreme-pressure and temperature industries. It is used across 6 applications where failure is not acceptable. The inconel 718 tubes are used in the following applications:
Aerospace Fluid Systems
Hydraulics and pneumatics require reliable, fracture-resistant tubes.
Gas Turbine Fluid Systems
It is used for transporting fuel and gases through the turbine's high-temperature and stress environment.
Cryogenic Transfer Lines
It handle the strength of inconel tubes at extremely low-temperature liquids, like rocket propellant.
Rocket Propellant Feed Lines
Their strength, and erosion resistance are critical for controlling the flow of highly reactive propellants.
High-pressure Heat Exchange Systems
These tubes are used in systems that require simultaneous resistance to significant pressure and temperature differentials.
Downhole Injection, and Control Lines
We use Inconel 718 seamless tubes to ensure reliable performance in harsh, corrosive, and high-pressure environments. It provides a balanced corrosion resistance.
Frequently Asked Questions
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Do I need PMI testing for Inconel 718 tubes?
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What sizes and dimensions do Inconel 718 tubes come in?Our inconel 718 seamless tubes come in diameters ranging from 6 to 257 mm and a wall thickness of 1 to 65 mm. We manufacture our tubes according to the requirements of various industrial standards.