Cast supealoyCobalt based alloyPrecision alloySUPER ALLOY
Refractory metal
Titanium & Zirconium alloy
Sputtering taget
Inconel718
Materialgrade: Inconel 718 nickel-based alloy
US grade: NO7718
Germany grade: W.Nr.2.4668/NiCr19Fe19Nb5
French grade: Nc19FeNb
I. Overview of Inconel 718(N07718) nickel-based alloy:
Inconel718 is a nickel-based superalloyreinforced by γ "phase center-centered γ" and face-centered cubic γ ′phase. It has good comprehensive performance in the temperature range of -253 ～ 700 ℃, and itsyields strength reaches the best of all deformed superalloys below 650 ℃.,meanwhild, it has good fatigue resistance, radiation resistance, oxidationresistance, corrosion resistance, as well as good processability, weldingperformance and long-term structural stability. The alloy can be used to make avariety of components with complex shapes that are widely used in theaerospace, nuclear energy and petroleum industries.
II. Physical and chemicalproperties:
1. Thermal performance:
(1) Melting temperature range: 1260 ～ 1320℃.
(2) Thermal conductivity: see Table 2-1.
Table 2-1
θ / ℃ | 11 | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 | 1000 |
λ/（W/（m·℃）） | 13.4 | 14.7 | 15.9 | 17.8 | 18.3 | 19.6 | 21.2 | 22.8 | 23.6 | 7.6 | 30.4 |
(3) Specific heat capacity: See Table 2-2.
(4) Coefficient of linear expansion: see Table2-3;
2. Density: ρ = 8.24g / cm3.
3. Electrical performance:
Table 2-2
θ / ℃ | 300 | 400 | 500 | 600 | 700 | 800 | 900 | 1000 |
c / (J / (kg · ℃)) | 481.4 | 493.9 | 514.8 | 539 | 573.4 | 615.4 | 657.2 | 707.4 |
Table 2-3
θ / ℃ | 20-100 | 20-200 | 20-300 | 20-400 | 20-500 | 20-600 | 20-700 | 20-800 | 20-900 | 20-1000 |
α / 10 -6℃-1 | 11.8 | 13 | 13.5 | 14.1 | 14.4 | 14.8 | 15.4 | 17 | 18.4 | 18.7 |
4. Magnetic properties: non-magnetic.
5. Anti-oxidation performance: See Table 2-4for the oxidation rate after 100h test in air medium.
Table 2-4
θ / ℃ | 600 | 700 | 800 | 900 | 1000 |
Oxidation rate / (g / (m 2 · h)) | 0.0176 | 0.0277 | 0.0351 | 0.0961 | 0.162 |
III. Main characteristics andapplications:
1. Main Features:
(1) Easy to machine.
(2) High tensile strength, fatigue strength,creep strength and breaking strength at 700 ° C.
(3) High oxidation resistance at 1000 ° C.
(4) It has stable chemical properties at lowtemperature.
(5) Good welding performance.
2. Application: Due to its high temperaturestrength, excellent corrosion resistance and easy processability at 700 ℃,it can be widely used in various high-demand services.
(1) Turbine.
(2) Liquid fuel rocket.
(3) Low temperature engineering.
(4) Acid environment.
(5) Nuclear engineering.
IV. Specifications and Ex-factorystatus
1. Classification: Huacheng Jinyan can supplyin form of seamless pipes, steel plates, round steel, forgings, flanges, rings,welded pipes, steel strips, wire and supporting welding materials.
2. Ex-factory status: Seamless Tube: solidsolution + acid white, length can be fixed; Plate: solid solution, pickling,trimming; Welded Tube: solid solution acid white + RT% flaw detection; Forging:annealing + turning; the bar is delivered in the state of forging, surfacepolishing or lapping; the strip is delivered after cold rolling, solid solutionsoftening, and descaling; the wire is solid-dissolved and pickled in a disc orstraight strip, solid solution straight polished.
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