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