AMS 5590 specification covers a corrosion- and heat-resistant nickel alloy (Alloy 718 / UNS N07718) in the form of seamless tubing having nominal outside diameter of 0.125 inch (3.18 mm) and over, with nominal wall thickness of 0.015 inch (0.38 mm) and over. Alloy 718 is an austenitic nickel-based superalloy that exhibits excellent high yield tensile and creep-rupture properties at temperatures up to 704°C (1300°F) and oxidation resistance up to 982°C (1800°F). This alloy is widely used in applications requiring high strength, including jet engine components and high-speed airframe parts such as wheels, buckets, spacers, and high-temperature bolts and fasteners.
Product Forms & Availability ZYTC Alloy offers Alloy 718 in a wide range of product forms: | Product Form | Availability |
|---|
| Seamless Tube | AMS 5590 – nominal OD ≥0.125″ (3.18mm) | | Bar | Rounds, flats, shapes | | Wire | Various gauges | | Billet | For further processing | | Strip | Thin gauge | | Rod | Solid rounds | | Sheet & Plate | Various thicknesses | | Forging Stock | For custom forgings | | Welding Wire | For joining applications |
For all stock availability, contact Sales.
Specifications | Specification | Product Form |
|---|
| AMS 5590 | Seamless tube (nominal OD ≥0.125″ / 3.18mm) | | AMS 5589 | Seamless tube (small diameter, precision) | | UNS N07718 | Unified numbering system | | Werkstoff Nr. 2.4668 | German standard | | AMS 5596 | Sheet, strip and plate | | AMS 5597 | Sheet, strip and plate | | AMS 5662 | Bars, forgings and rings (solution treated) | | AMS 5663 | Bars, forgings and rings (precipitation hardened) | | AMS 5664 | Bars, forgings and rings (alternative) | | AMS 5832 | Welding wire | | ASTM B637 | Forgings | | ASTM B670 | Plate, sheet and strip |
Fabrication Solution Annealing: 954-982°C (1750-1800°F) × 1 hour, air cool or faster . Precipitation Hardening: 718-732°C (1325-1350°F) × 8 hours, furnace cool to 621°C (1150°F) × 8-18 hours, air cool . Cold Working: Moderate formability in solution annealed condition . Welding: Good weldability using GTAW (TIG); post-weld aging required to restore properties .
ApplicationsJet Engine Components: High-temperature tubing for fuel lines, hydraulic lines, cooling systems, instrumentation lines High-Speed Airframe Parts: Wheels, buckets, spacers, structural tubing, landing gear components High-Temperature Bolts and Fasteners: Threaded fasteners requiring 150 ksi yield strength for elevated temperature service Cryogenic Applications: Tubing for liquid hydrogen and oxygen systems in rocket engines Rocket Motors: Fluid transfer lines, pressurization systems, structural components Nuclear Reactors: Instrumentation tubing, fuel element hardware, control rod mechanisms Oil & Gas: Downhole tubing, instrumentation lines for high-pressure high-temperature (HPHT) wells
Request a quote for AMS 5590 / UNS N07718 / Alloy 718 Seamless Tube (W. Nr. 2.4668). Please provide: Outside diameter (OD) and wall thickness required Length required (cut lengths or random lengths) Quantity (kg, meters, or pieces) Heat treatment condition (solution treated or precipitation hardened) Destination port Any special certification requirements
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