25kg/drum or 1kg /bag
H4169 (UNS N07718)IntroductionGH4169 alloy, also known as Inconel 718 in foreign countries, is a Ni Cr Fe based precipitation hardening
deformation high-temperature alloy with a long-term use temperature range of -253 degree to 650 degree and a short-term use temperature of up to 800 degree. This alloy has high strength below 650 degree, excellent fatigue resistance, radiation resistance, oxidation resistance, and corrosion resistance, as well as good processing performance, welding performance, and long-term structural stability. It is widely used in aviation, aerospace, petrochemical and other fields. Product TypeBars, plates, strips (narrow strips), wires, pipes, rings, and forgings.Melting ProcessVacuum induction melting atmosphere protected electroslag remelting, vacuum induction melting vacuum
consumable remelting.Typical
mechanical
propertiesProduct TypeTensile Testingσb/MPa σp0.2/MPa δ5/% ψ/%Forging Rod 137011802028Rolling Rod 139011902346Disc. 137011801833Forged Ring 137011901835Corrosion
resistanceθ/ºC 6007008009001000100h oxidation rate/ [g/(m2·h)]0.0180.0280.0350.0960.162Characters1. Good hot working performance;
2. It has high tensile strength, yield strength, fatigue strength, and creep resistance at temperatures
below 650 degree;
3. High antioxidant properties at 1000 degree and below;
4. Good low-temperature performance (used up to -253 degree);
5. Good welding performance.Typical MicrostructureThe microstructure of Inconel 718 alloy in standard heat treatment state is determined by γ Matrix
γ ,γ ,δ And NbC organization. Among them γ The (Ni3Nb) phase is the main strengthening
phase, which is a metastable phase with a body centered tetragonal ordered structure. It disperses
and precipitates coherently in the matrix in a circular shape. During long-term aging or application,
it has a directional effect δ The trend of phase transition leads to a decrease in strength; γ The
number of Ni3 (Al, Ti) phases is second only to γ Phase, dispersed and precipitated in a spherical
shape, plays a partial strengthening role on the alloy; δ The phase mainly precipitates at grain
boundaries, and its morphology is related to the final forging temperature during forging.ApplicationsThis alloy can be used to manufacture various stationary and rotating components in aviation and
aerospace engines, such as discs, rings, casings, shafts, blades, fasteners, elastic components, gas
ducts, sealing components, and welded structural components; Manufacturing various elastic components and grids for nuclear energy industrial applications; Manufacturing of parts and other components for applications in the petroleum and chemical industries.
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