Alloy 718 (UNS N07718) AMS 5662 Round Rod: Precision Manufacturing and Global Export Capabilities
At ZYTC Alloy, we pride ourselves on executing a fully standardized, proceduralized, and professionalized manufacturing and inspection protocol for every order. Our recent successful export of Alloy 718 (UNS N07718) AMS 5662 round rod to Taiwan exemplifies this commitment. The shipment, featuring precision ø13.5 (±0.1) * 3000mm specification, underwent rigorous testing before delivery, including chemical verification, solution-treated ambient mechanical testing, and required aging treatments. We conducted comprehensive ambient, 649°C (1200°F) high-temperature mechanical testing, and 649°C stress-rupture testing, providing the client with standard solution and aging heat treatment diagrams to confirm full specification compliance.
Understanding Alloy 718 (UNS N07718)
Alloy 718, also known as Inconel® 718 or W.Nr. 2.4668, is a precipitation-hardenable, austenitic nickel-chromium superalloy . Renowned for its exceptional high yield tensile strength and creep-rupture properties at elevated temperatures up to 1300°F (700°C), and its oxidation resistance up to 1800°F (980°C), Alloy 718 maintains mechanical stability across a wide thermal range, from cryogenic temperatures to extreme heat . The alloy's unique composition includes significant additions of niobium (columbium) and molybdenum, which react with aluminum and titanium to form strengthening precipitates during aging heat treatments .
Chemical Composition of Alloy 718 (UNS N07718) per AMS 5662
The precise chemical balance of Alloy 718 is critical to its performance. The standard limits for UNS N07718 are as follows:
| Element | Content (wt%) |
|---|---|
| Nickel (Ni) (plus Cobalt) | 50.0 – 55.0 |
| Chromium (Cr) | 17.0 – 21.0 |
| Iron (Fe) | Balance |
| Niobium (Nb) + Tantalum (Ta) | 4.75 – 5.50 |
| Molybdenum (Mo) | 2.80 – 3.30 |
| Titanium (Ti) | 0.65 – 1.15 |
| Aluminum (Al) | 0.20 – 0.80 |
| Cobalt (Co) | 1.00 max |
| Carbon (C) | 0.08 max |
| Silicon (Si) | 0.35 max |
| Manganese (Mn) | 0.35 max |
| Phosphorus (P) | 0.015 max |
| Sulfur (S) | 0.015 max |
| Boron (B) | 0.006 max |
| Copper (Cu) | 0.30 max |
Mechanical Properties of AMS 5662 Alloy 718
To meet the stringent AMS 5662 specification, Alloy 718 round Bars and rods must demonstrate high strength characteristics. UNS N07718 is typically supplied in the solution-treated condition and can be age-hardened to achieve its maximum mechanical properties. The table below summarizes the typical mechanical requirements for aged Alloy 718:
These high-strength properties, combined with exceptional creep resistance, make Alloy 718 indispensable in critical engineering.
Applications of Inconel® 718 Products
Originally developed for the demanding aerospace sector, Alloy 718 has become a staple material across multiple high-performance industries . Typical applications include:
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Aerospace: Jet engine components, turbine blades, discs, shafts, fasteners, and casings.
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Oil & Gas: Downhole drilling components, wellhead equipment, sub-surface safety valves, and high-strength bolting, often specified for sour service environments.
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Power Generation: Gas turbine components, nuclear reactor parts, and high-temperature systems.
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General Industrial: Springs, pump parts, shafts, and high-strength fasteners requiring dimensional stability at elevated temperatures.
ZYTC Alloy: Your Comprehensive Source for Alloy 718
ZYTC Alloy is not limited to round bars. We are a comprehensive supplier capable of producing high-quality Alloy 718 in various forms, including sheet, strip, wire, bar, pipe, tube, and forgings. We welcome custom fabrication requests and strictly adhere to international standards such as ASTM, EN, and AMS specifications for all manufacturing processes. Our commitment to fast delivery cycles, reasonable pricing, and unwavering quality makes us a trusted partner for
