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Alloy 718/Inconel 718/2.4668/UNS N07718/Nicrofer 5219Nb has excellent corrosion resistance at high and low temperatures and good resistance to be stress-corrosion cracking and pitting corrosion. Alloy 718/Inconel 718/2.4668/UNS N07718/Nicrofer 5219Nb has good performance in hostile environments containning H2S,CO2,chlorides,sulfides and free sulfur at selected temperatures. Alloy 718/Inconel 718/2.4668/UNS N07718/Nicrofer 5219Nb is commonly used for cryogenic storage tanks,downhole shafts and wellhead parts.
Alloy 718/Inconel 718/2.4668/UNS N07718/Nicrofer 5219Nb Chemical composition
|
Alloy |
% |
Ni |
Cr |
Fe |
Mo |
Nb |
Co |
C |
Mn |
Si |
S |
Cu |
Al |
Ti |
|
718 |
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 |
Alloy 718/Inconel 718/2.4668/UNS N07718/Nicrofer 5219Nb Physical properties
|
Density |
8.2 g/cm³ |
|
Melting point |
1260-1340 ℃ |
Alloy 718/Inconel 718/2.4668/UNS N07718/Nicrofer 5219Nb minimum mechanical properties in the roomtemperature
|
Alloy |
Tensile strength |
Yield strength |
Elongation |
Brinell hardness |
|
Solution treatment |
965 |
550 |
30 |
≤363 |
Alloy 718/Inconel 718/2.4668/UNS N07718/Nicrofer 5219Nb producing standard
|
Specification |
Seamless |
Bar |
Sheet/strip |
Forging |
Wire |
|
UNS N07718 /2.4668/NiCr19Nb5Mo3 |
AMS 5589 |
ASTM B637* |
ASTM B670* |
ASTM B637* |
AMS 5832 |
Alloy 718/Inconel 718/2.4668/UNS N07718/Nicrofer 5219Nb 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.
Alloy 718/Inconel 718/2.4668/UNS N07718/Nicrofer 5219Nb Metallurgical structure
Alloy 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.
Alloy 718/Inconel 718/2.4668/UNS N07718/Nicrofer 5219Nb Corrosion resistance
Alloy 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.
Alloy 718/Inconel 718/2.4668/UNS N07718/Nicrofer 5219Nb 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
