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Inconel 718 (GH4169/N07718) Nickel Alloy Plate for Aerospace Applications

Inconel 718 nickel alloy plate is a high-strength, corrosion- and heat-resistant material engineered for demanding aerospace environments. Known by designations GH4169 and UNS N07718, this precipitation-hardenable superalloy maintains excellent mechanical properties at temperatures up to 700°C. Conforming to AMS, ASTM, and GB standards, Inconel 718 plates are widely used in jet engines, turbine discs, structural aerospace parts, and other high-temperature, high-stress components. Custom dimensions and OEM machining services are available.
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Inconel 718, also known as GH4169 or UNS N07718, is a nickel-chromium alloy designed for exceptional strength, corrosion resistance, and performance at high temperatures. This alloy plate is commonly used in aerospace applications such as turbine discs, jet engines, exhaust systems, and structural components operating under extreme thermal and mechanical stress.

Key Features

  • Excellent tensile, fatigue, and creep-rupture strength

  • Good weldability and fabrication properties

  • Oxidation and corrosion resistance in high-temperature environments

  • Maintains mechanical integrity up to 700°C (1292°F)

  • Available with OEM cutting, surface finishing, and machining

Chemical Composition

ElementContent (%)
Nickel (Ni)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

Mechanical Properties

PropertyValue
Tensile Strength≥ 965 MPa
Yield Strength (0.2% offset)≥ 550 MPa
Elongation≥ 30%
Hardness≤ 363 HB
Operating Temperature Range-253°C to 700°C

Standards & Grades

  • ASTM B670 / B637

  • AMS 5596 / 5662 / 5663

  • UNS N07718

  • GB/T 14992 (GH4169)

Applications

  • Aerospace turbine engines and combustion chambers

  • Jet engine parts: discs, shafts, and blades

  • Gas turbine components

  • Nuclear and cryogenic systems

  • Automotive turbochargers and exhaust manifolds

Available Dimensions

ThicknessWidthLengthTolerance
3 mm – 60 mmUp to 1500 mmUp to 6000 mm±0.1 mm (customizable)

Processing Options

  • Hot rolled or cold rolled plate

  • Annealed or solution-treated

  • Waterjet cutting, laser cutting, CNC milling

  • Surface finishing: bright, pickled, or polished

FAQ

Q: What is the difference between GH4169 and Inconel 718?

GH4169 is the Chinese designation equivalent to the international alloy Inconel 718. Both share the same chemical composition and mechanical properties.

Q: Can Inconel 718 plates be used at cryogenic temperatures?

Yes, Inconel 718 maintains excellent ductility and toughness even at cryogenic temperatures down to -253°C.

Q: What certifications do your plates carry?

We provide EN 10204 3.1 / 3.2 certification, as well as certifications according to ASTM, AMS, and customer-specific aerospace requirements.

Q: Do you support custom sizes or machining?

Yes, we offer full OEM support including custom plate cutting, surface treatment, and CNC precision machining based on your drawings.

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