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