Exceptional tensile strength maintained from cryogenic temperatures up to 1300°F (704°C).
Outstanding resistance to corrosion, oxidation, and stress-corrosion cracking in harsh environments.
Excellent weldability and fabricability with minimal risk of post-weld cracking.
Superior fatigue resistance and creep rupture strength for extended service life.
Inconel 718 is a precipitation-hardened nickel-chromium alloy known for its exceptional strength, corrosion resistance and performance at elevated temperatures
As a professional Inconel 718 supplier, Hengyi Metal provides high-quality plates, bars, forgings and customized solutions for aerospace and high-performance industrial applications.
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Email: sales@hengyimetal.com
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Inconel 718 is a nickel-chromium-molybdenum alloy designed to resist a wide range of severely corrosive environments, pitting and crevice corrosion. This nickel steel alloy also displays exceptionally high yield, tensile, and creep-rupture properties at high temperatures. This nickel alloy is used from cryogenic temperatures up to long term service at 1200° F. One of the distinguishing features of Inconel 718’s composition is the addition of niobium to permit age hardening which allows annealing and welding without spontaneous hardening during heating and cooling. The addition of niobium acts with the molybdenum to stiffen the alloy’s matrix and provide high strength without a strengthening heat treatment. Other popular nickel-chromium alloys are age hardened through the addition of aluminum and titanium. This nickel steel alloy is readily fabricated and may be welded in either the annealed or precipitation (age) hardened condition. This superalloy is used in a variety of industries such as aerospace, chemical processing, marine engineering, pollution-control equipment, and nuclear reactors
High temperature components, such as turbine blades, guide vanes, turbine disks, high pressure compressor disks,machine manufacturing and combustion chambers used in the manufacture of aviation, naval and industrial gas turbines
Form | ASTM |
Rod, bar and forging | B 637 |
Plate, sheet and strip | B 670, B 906 |
Seamless pipe and tube | B 983 |
Chemical composition
% | Ni | Fe | Cr | Mo | C | Mn | Si | P | S | Co | Nb+Ta | Ti | Al | Cu | B |
min | 50.0 | balance | 17.0 | 2.80 | 4.75 | 0.65 | 0.20 | ||||||||
max | 55.0 | 21.0 | 3.30 | 0.08 | 0.35 | 0.35 | 0.015 | 0.015 | 1.00 | 5.50 | 1.15 | 0.80 | 0.30 | 0.006 |
Physical properties
Density | 8.23 g/cm3 |
Melting range | 1260-1335℃ |
Item | Inconel 600 | Inconel 601 | Inconel 617 | Inconel 625 | Inconel 690 | Inconel 718 | Inconel X750 | Inconel 825 |
C | ≤0.15 | ≤0.1 | 0.05-0.15 | ≤0.08 | ≤0.05 | ≤0.08 | ≤0.08 | ≤0.05 |
Mn | ≤1 | ≤1.5 | ≤0.5 | ≤0.35 | ≤0.5 | ≤0.35 | ≤1 | ≤1 |
Fe | 6-10 | rest | ≤3 | rest | 7-11 | rest | 5-9 | ≥22 |
P | ≤0.015 | ≤0.02 | ≤0.015 | — | — | — | — | — |
S | ≤0.015 | ≤0.015 | ≤0.015 | ≤0.015 | ≤0.015 | ≤0.01 | ≤0.01 | ≤0.03 |
Si | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.35 | ≤0.5 | ≤0.35 | ≤0.5 | ≤0.5 |
Cu | ≤0.5 | ≤1 | — | ≤0.3 | ≤0.5 | ≤0.3 | ≤0.5 | 1.5-3 |
Ni | ≥7.2 | 58-63 | ≥44.5 | 50-55 | ≥58 | 50-55 | ≥70 | 38-46 |
Co | — | — | 10-15 | ≤10 | — | ≤1 | ≤1 | — |
Al | — | 1-1.7 | 0.8-1.5 | ≤0.8 | — | 0.2-0.8 | 0.4-1 | ≤0.2 |
Ti | — | — | ≤0.6 | ≤1.15 | — | — | 2.25-2.75 | 0.6-1.2 |
Cr | 14-17 | 21-25 | 20-24 | 17-21 | 27-31 | 17-21 | 14-17 | 19.5-23.5 |
Nb+Ta | — | — | — | 4.75-5.5 | — | 4.75-5.5 | 0.7-1.2 | — |
Mo | — | — | 8-10 | 2.8-3.3 | — | 2.8-3.3 | — | 2.5-3.5 |
B | — | — | ≤0.006 | — | — | — | — | — |
Learn more about Inconel 718 properties
Compare with other alloys in our Inconel 600 vs 625 guide
FAQ
Q: What is Inconel 718 used for?
A: It is widely used in aerospace, oil and gas, and high-temperature applications requiring high strength.
Q: What temperature can Inconel 718 withstand?
A: It performs well up to around 700°C in high-stress environments.
Q: Are you an Inconel 718 supplier?
A: Yes, Hengyi Metal supplies high-quality Inconel 718 materials worldwide.
Alloy | ASTM | DIN | BS | AFNOR | GB | |
|---|---|---|---|---|---|---|
New grades | Old grades | |||||
| Inconel 600 | UNS N06600 | 2.4816 / NiCrl 5Fe | NA14 | NC15FE | NS3102 | NS312 |
| Inconel 601 | UNS N06601 | 2.4851 / NiCr23Fe | NC23FeA | NS3103 | NS313 | |
| Inconel 625 | UNS N06625 | 2.4856 / NiCr22Mo9Nb | NA21 | NC 22 DNb | NS3306 | NS336 |
| Inconel 718 | UNS N07718 | 2.4668 / NiCr19Fe19Nb5Mo3 | NA 51 | NC19FeNb | GH4169 | GH4169 |
| Inconel X-750 | UNS N07750 | 2.4669 / NiCr15Fe7TiAl | NC15TNbA | GH4145 | GH4145 | |
| Inconel 725 | UNS N07725 | |||||
