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      InconelX-750

      InconelX-750 (UNS NO7750)
      InconelX-750 Features and Applications Overview:
      The alloy is primarily a Ni-base superalloy aged with γ '[Ni3 (Al, Ti, Nb)] phase and has good corrosion resistance and oxidation resistance under 980 ° C., high strength below 800 ° C., 540 ℃ the following has better resistance to relaxation performance, but also has good formability and welding performance, the alloy is mainly used in the manufacture of aero-engine work below 800 ℃ and require higher strength corrosion-resistant rings, structural parts and Bolts and other parts, work below 540 ℃ with moderate or low stress and require relaxation of the flat spring and coil spring. Can also be used to manufacture turbine blades and other parts.
      InconelX-750 Similar brands:
      GH4145 GH145 (China), NCl5FeTNbA (France), W.Nr.2.4668 NiCr15Fe7TiAl (Germany) NCF750 (Japan)
      InconelX-750 Chemical composition:


      Alloy
      Grade

      %

      Ni

      Co

      Cr

      Fe

      Mo

      Nb

      C

      Mn

      Si

      S

      Cu

      Al

      Ti

      Inconel
      X-750

      Min



      14.0

      5.0








      0.4

      2.35

      Maximum

      70

      17.0

      9.0



      0.08

      1.0

      0.5

      0.01

      0.5

      1.0

      2.75

      InconelX-750 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

      8.25

      1395
      1425

      14.7(100℃)

      430

      214


      1.22


      13.1(20~100℃)

      InconelX-750 mechanical properties: (at 20 ℃ detection of the minimum mechanical properties):

      Heat treatment methods

      Tensile strengthσb/MPa

      Yield Strengthσp0.2/MPa

      Elongationσ5 /%

      Brinell hardness HBS

      Solution treatment

      930

      515

      30


      InconelX-750 Production Executive Standard:

      Standard

      Bar

      Forgings

      Plate (with) material

      Wire

      Pipe

      American Society for Testing and Materials

      ASTM B637

      ASTM B637




      American Aerospace Materials Technical Specification

      AMS 5667
      AMS 5668
      AMS 5669
      AMS 5670
      AMS 5671
      AMS 5741
      AMS 5749

      AMS 5667
      AMS 5668
      AMS 5670
      AMS 5671
      AMS 5747
      AMS 5749

      AMS 5542
      AMS 5598

      AMS 5698
      AMS 5699

      AMS 5582

      American Society of Mechanical Engineers

      ASME SB637

      ASME SB637




      InconelX-750 microstructure:
      The microstructure of the alloy is composed of γ matrix, Ti (C, N), Nb (C, N), M23C6 carbides and γ '[Ni3 (Al, Ti, Nb)] phases with γ' content of about 14.5 %, Is the main strengthening phase of the alloy.
      InconelX-750 process performance and requirements:
      1, the forging temperature of the alloy is easy to form between 1220 ~ 950 ℃. The alloy is solution treated after the intense forming process.
      2, the average grain size of the alloy and forging deformation degree, the final forging temperature is closely related.
      3, the alloy has good welding performance, can be a variety of welding. Aging after welding gives approximately the complete strength of the heat treated state.
      4, part heat treatment in sulfur-free neutral or reducing atmosphere, so as to avoid sulfidation.

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