Inconel 718 alloy has similar grades in different countries and regions, as follows:
-US: Inconel 718, UNS N07718
-China: GH4169
Europe: 2.4668
-Japan: NCF718
Inconel 718
Inconel 718 Alloy Properties
Inconel 718 alloy is a nickel-chromium based precipitation hardening superalloy, known for its excellent corrosion resistance, oxidation resistance and high temperature strength. The alloy has excellent performance between 600°C and 700°C, which is suitable for high temperature applications in aerospace, energy, petrochemical and other fields.
Ingredients
|
element |
Content (%) |
|
Nickel (Ni) |
50-55 |
|
Chromium (Cr) |
17-21 |
|
Molybdenum (Mo) |
2.8-3.3 |
|
Niobium (Nb) |
4.75-5.5 |
|
Titanium (Ti) |
0.65-1.15 |
|
Aluminum (Al) |
0.2-0.8 |
|
Iron (Fe) |
margin |
physical properties
|
performance index |
value |
|
density |
8.19 g/cm³ |
|
melting point |
1260-1320°C |
|
Coefficient of thermal expansion (20-1000°C) |
13 x 10⁻⁶ /°C |
|
thermal conductivity |
11.4 W/(m·K) |
|
modulus of elasticity |
204 GPa |
heat treatment
|
Processing Steps |
Description |
|
solution treatment |
was rapidly cooled after heating at 980-1000°C. |
|
aging treatment |
was heated to 718°C and held for 8 hours, then decreased to 620°C and held for 8 hours. |
machining and welding
·Cold working: suitable for cold drawing and cold rolling, which can improve strength.
·Hot processing: It should be carried out between 900-1150°C.
·Welding: suitable for tungsten argon arc welding, etc., heat treatment is required after welding.
Application
·Aerospace: used for turbine blades, turbine discs, etc.
·Petrochemical industry: valves and pipelines for high temperature and high pressure.
·nuclear industry: structural parts suitable for high temperature environment.
·Gas Turbines: Turbine Blades and Seals.
Inconel 718 alloys are available in different shapes and sizes, including plates, bars, wires and forgings.
