Alloy 718/Inconel 718 /UNS N07718
Inconel 718 Material grades and equivalents:
Inconel 718 /Alloy 718 / GB GH4169 / UNS N07718 / SEW VDIUV W.Nr.2.4668 / NiCr19Fe19Nb5Mo3 / BS NA 51/ AFNOR NC19FeNb
Alloy 718 (UNS N07718/W.Nr. 2.4668) is a high-strength, corrosion-resistant nickel chromium material used at -423° to 1300°F. The age-hardenable alloy can be readily fabricated, even into complex parts. Its welding characteristics, especially its resistance to postweld cracking, are outstanding. The ease and economy with which INCONEL alloy 718 can be fabricated, combined with good tensile, fatigue, creep, and rupture strength, have resulted in its use in a wide range of applications. Examples of these are components for liquid fueled rockets, rings, casings and various formed sheet metal parts for aircraft and land-based gas turbine engines, and cryogenic tankage. It is also used for fasteners and instrumentation parts.
%
|
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：
-
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
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/ASTM B637
|
