Inconel 718 UNSTrademarkW.NrN07718Inconel7182.4668 Inconel 718 Chemical composition Alloy%NiCrFeMoNbAlCMnSiSCuAlTiBInconel 718Min.5017balance2.84.750.20.20.65Max.55213.35.50.60.080.350.350.0150.300.81.150.006
Inconel 718 Physical properties Density8.24 g/cm³Melting point1260-1320 °C
Inconel 718 Alloy minimum mechanical properties in the roomtemperature StatusTensile strength
Rm N/mm²Yield strength
Rp 0. 2N/mm²Elongation
As %Brinell hardnessHBSolution treatment96555030≤363718Characteristic as below:
1.workability2.High tensile strength,endurance strength,creep strength and rupture strength at 700°C.3.High inoxidability at1000°C.
4.Steady mechanical performance in the low temperature.5.Good welding performance.Inconel 718 metallurgical structure718 alloy 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 resistance718 alloy 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°C properties made it use in a wide range of high requirement environments.
1.Steam turbine
2.Liquid-fuel rocket
3.Cryogenic engineering4.Acid environment5.Nuclear engineering