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    4. Welcome to: Danyang Hualong Special Steel Co., Ltd. official website
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      Inconel 718 Precipitation strengthening nickel base superalloy

      Inconel 718 Precipitation Enhanced Nickel-Based Superalloy

      Inconel 718 Features and Applications Overview:

      The alloy has a good overall performance in the temperature range of -253 ~ 700 ℃. The yield strength below 650 ℃ ranks first in the deformed superalloy and has good resistance to fatigue, radiation, oxidation and corrosion as well as good Processing performance, good welding performance. Can produce a variety of complex shapes of parts and components, in the aerospace, nuclear energy, petroleum industry and extrusion die, in the above temperature range has been very widely used.

      Inconel 718 Similar Plaques:

      GH4169 GH169 (China), NC19FeNb (France), W.Nr.2.4668 NiCr19Fe19Nb5 (Germany)

      Inconel 718 chemical composition:

      Alloy
      Grade

      %

      Ni

      Cr

      Fe

      Mo

      Nb

      Co

      C

      Mn

      Si

      S

      Cu

      Al

      Ti

      Inconel
      718

      Min

      50

      17

      Margin

      2.8

      4.75

      0.20

      0.65

      Maximum

      55

      21

      3.3

      5.50

      1.0

      0.08

      0.35

      0.35

      0.015

      0.30

      0.80

      1.15

      Inconel 718 Physical Properties:

      Density
      g/cm3

      Melting point

      Thermal conductivity
      λ/(W/m•℃)

      Specific heat capacity
      J/kg•℃

      Elastic Modulus
      GPa

      Shear modulus
      GPa

      Resistivity
      μΩ•m

      Poisson's ratio

      Linear expansion coefficient
      a/10-6℃-1

      8.24

      1260
      1320

      14.7(100℃)

      435

      199,9

      77,2

      1.15

      0.3

      11.8(20~100℃)

      Inconel 718 mechanical properties: (at 20 ℃ minimum detection of mechanical properties)

      Heat treatment methods

      Tensile strength σb / MPa

      Yield strength σp0.2 / MPa

      Elongation rate σ5 /%

      Brinell hardness HBS

      Solution treatment

      965

      550

      30

      ≥363

      Inconel 718 Production Executive Standard:

      Standard

      Bar

      Forgings

      Plate (with) material

      Wire

      Pipe

      American Society for Testing and Materials

      ASTM B637

      ASTM B637

      ASTM B670
      ASTM B906

      American Aerospace Materials Technical Specification

      AMS 5662
      AMS 5663
      AMS 5664

      AMS 5662
      AMS 5663
      AMS 5664

      AMS 5596
      AMS 5597

      AMS 5832

      AMS 5589
      AMS 5590

      American Society of Mechanical Engineers

      ASME SB637

      ASME SB637

      Inconel 718 microstructure:
      The standard heat treatment of the organization of the alloy from the gamma matrix γ ', γ', δ, NbC phase composition
      Inconel 718 process performance and requirements:
      1, Due to the high niobium content in Inconel718 alloy, the degree of niobium segregation in the alloy is directly related to the metallurgical process.
      2, in order to avoid the element segregation in the ingot too heavy, the ingot diameter of not more than 508mm.
      3, the homogenized alloy has good hot workability, ingot billet heating temperature shall not exceed 1120 ℃.
      4, the alloy grain size and the average forging deformation degree, final forging temperature is closely related.
      5, the alloy has satisfactory welding performance, available welding, electron beam welding, seam welding, spot welding and other methods of welding.
      6, different alloy solution treatment and aging process will get different material properties. Due to the low diffusion rate of the γ "phase, Inconel 718 alloys get the best mechanical properties through prolonged aging.
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