UNS N07718 (Inconel 718)

Short Introduction:

Inconel 718 / GB GH4169 / UNS N07718 / SEW VDIUV W.Nr.2.4668 NiCr19Fe19Nb5Mo3 /BS NA 51 / AFNOR NC19FeNb with extremely resistance to stress corrosion cracking and pitting ability in high temperature or low temperature environments, especially the inoxidability in the high temperature.

    Category:

    Description

    Inconel 718 /UNS N07718

    Inconel 718 Material grades and equivalents

    Inconel 718 / GB GH4169 / UNS N07718 / SEW VDIUV W.Nr.2.4668 NiCr19Fe19Nb5Mo3 / BS NA 51/ AFNOR NC19FeNb

    Inconel 718 Chemical composition:

     %

     Ni

     Cr

     Fe

     Mo

     Nb

     Co

     C

     Mn

     Si

     S

     Cu

     Al

     Ti

     Min.

     50

     17

       balance

     2.8

     4.75

     0.2

     0.7

    Max.

     55

     21

     3.3

     5.5

     1

     0.08

     0.35

     0.35

    0.01

     0.3

     0.8

     1.15

     

    Inconel 718 Physical properties:

    Density

    8.2 g/cm³

    Melting point

    1260-1340 ℃

     

    Inconel 718 Alloy minimum mechanical properties in the roomtemperature:

     Alloy

    Tensile strength Rm N/mm²

    Yield strength R P0. 2N/mm²

    Elongation A 5 %

    Brinell hardness HB

    Solutiontreatment

     965

     550

     30

     ≤363

     

    Inconel 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:

    Inconel 718 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:

    Inconel 718 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:

    1. The elevated temperature strength, excellent corrosion resistance and workability at 700℃ properties made it use in a wide range of high requirement environments.

    2. 1.Steam turbine 2.Liquid-fuel rocket

    3. 3.Cryogenic engineering 4.Acid environment 5.Nuclear engineering

    Specifications:

     

    Sheet/Plate

    AMS 5599/AMS 5879/ASME SB-443 Gr.

    1/ASTM B670

    Wire

    ASTM B670

    Bar/Forging

    AMS 5666/ASME SB-446 Gr. 1/ASTM

    B-446 Gr. 1