ALLOY718 block

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  • Inconel 718

    UNS

    Trademark

    W.Nr

    N07718

    Inconel718

    2.4668

     Inconel 718 Chemical composition

    Alloy

    %

    Ni

    Cr

    Fe

    Mo

    Nb

    Al

    C

    Mn

    Si

    S

    Cu

    Al

    Ti

    B

    Inconel 718

    Min.

    50

    17

    balance

    2.8

    4.75

    0.2

     

     

     

     

     

    0.2

    0.65

     

    Max.

    55

    21

    3.3

    5.5

    0.6

    0.08

    0.35

    0.35

    0.015

    0.30

    0.8

    1.15

    0.006

    Inconel 718 Physical properties

    Density

    8.24 g/cm³

    Melting point

    1260-1320 ℃

    Inconel 718 Alloy minimum mechanical properties in the roomtemperature

    Status

    Tensile strength 
    Rm N/mm²

    Yield strength 
    Rp 0. 2N/mm²

    Elongation 
    As %

    Brinell hardness

    HB

    Solution treatment

    965

    550

    30

    ≤363

    718 Characteristic as below:
    1.workability

    2.High tensile strength,endurance strength,creep strength and rupture strength at 700℃.

    3.High inoxidability at1000℃.
    4.Steady mechanical performance in the low temperature.

    5.Good welding performance.

     

    Inconel 718 Metallurgical structure

    718 alloy is Austenitic structure, precipitation hardening generate "γ" made it excellent mechanical performance. G rain boundary generate "δ" made it the best plasticity in the heat treatment.

     

    Inconel 718 Corrosion resistance

    718 alloy with extremely resistance to stress corrosion cracking and pitting ability in high temperature or low temperature environments, especially the inoxidability in the high temperature.


    Inconel 718 Application field
    The elevated temperature strength, excellent corrosion resistance and workability at 700℃ properties made it use in a wide range of high requirement environments. 
    1.Steam turbine
    2.Liquid-fuel rocket 
    3.Cryogenic engineering

    4.Acid environment

    5.Nuclear engineering

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