Inconel 718 (UNS N07718) High-Strength Superalloy Pipes
Precipitation-hardenable nickel-chromium-niobium superalloy engineered for rocket engines, gas turbines, and high-pressure sour gas wells.
AMS 5589 / ASTM B983 UNS N07718 (Alloy 718) High-Strength Pipe
Starlight Tubes produces precision-engineered Inconel 718 (UNS N07718 / DIN 2.4668) seamless pipes and heavy-wall hollow bars for extreme mechanical loading and corrosive subsea environments. Unlike many age-hardening superalloys, 718 exhibits outstanding weldability without spontaneous cracking during heating or cooling.
Our Inconel 718 pipes are supplied in solution-annealed or precipitation age-hardened conditions per AMS 5589 and API 6A CRA requirements. Every length undergoes ultrasonic immersion testing, hydrostatic pressure verification, and microstructural grain size analysis.
Technical Specifications
ASTM / ASME CompliantTechnical Specifications — Inconel 718 (UNS N07718)
Certified chemical limits and mechanical tensile properties for Inconel 718
| Grade | Ni | Cr | Nb+Ta | Mo | Ti | Al | Fe | C (max) |
|---|---|---|---|---|---|---|---|---|
| Inconel 718 | 50.0-55.0 | 17.0-21.0 | 4.75-5.50 | 2.80-3.30 | 0.65-1.15 | 0.20-0.80 | Balance | 0.08 |
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Direct Mill Sourcing for Inconel 718 Pipes
Starlight Tubes manufactures certified Inconel 718 pipes with AMS 5589 and API 6A compliance, full mechanical testing, and worldwide secure delivery.
Frequently Asked Questions on Inconel 718 (UNS N07718) Pipes
Key engineering, tolerance, and international compliance answers from our metallurgical quality desk.
Gamma double prime (γ'') precipitation hardening through the addition of Niobium (4.75-5.50%) combined with Titanium and Aluminum creates powerful atomic lattice barriers against deformation.
Request Project Quotation for Inconel 718 (UNS N07718) Pipes
Submit your required sizes, wall thicknesses, material grades, and total tonnage. Our technical sales engineers respond with complete mill pricing and lead times within 24 hours.