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Inconel 718/UNS N07718/ Alloy 718
DLX
bright
ISO9001
7-20 days
Hydrogen Storage Tanks
Product Description
DLX Alloy's Inconel 718 (UNS N07718, W.Nr. 2.4668, Nickel Alloy 718) plate is a precipitation-hardenable nickel-chromium superalloy renowned for its exceptional mechanical strength, toughness, and resistance to hydrogen-induced degradation. Specifically engineered for demanding hydrogen energy applications, this high-performance material excels in high-pressure gaseous hydrogen storage (up to 700-1000 bar) and transportation systems where hydrogen embrittlement resistance is critical.
Inconel 718 maintains superior properties across extreme temperatures (-253°C to 700°C), making it the preferred choice for manufacturing composite overwind pressure vessels (Type IV hydrogen tanks), liners, valves, and fittings in fuel cell vehicles, hydrogen refueling stations, and stationary hydrogen storage solutions. Compared to Inconel 625, Inconel 718 offers higher yield strength and better fatigue resistance, ensuring long-term reliability in cyclic high-pressure hydrogen environments.
Precipitation hardenable: Alloy 718 can be age hardened to meet specified mechanical-property requirements. The required heat-treatment condition should be agreed before ordering.
High strength: Strength depends on product form, thickness, processing route and heat treatment. Use values tied to the applicable specification and test condition.
Corrosion resistance: The alloy is used in environments where a combination of strength and corrosion resistance is required. Confirm suitability for the specific chemical medium and operating conditions.
Cryogenic and elevated-temperature use: Alloy 718 is used across a range of temperatures, but allowable service conditions depend on stress, environment, component design and material condition.
Good fabrication and welding characteristics: Fabrication procedures should follow the applicable material and process requirements.
Specification
| Steel grade | Inconel 718 |
| Corresponding brand | N07718/2.466 8/GH4169 |
Chemical composition%
| Steel grade | Inconel 718 |
| C≤ | 0.080 |
| Mn≤ | 0.35 |
| P≤ | 0.015 |
| S≤ | 0.015 |
| Si≤ | 0.35 |
| Cr≤ | 17.0-21.0 |
| Ni≤ | 55.0-59.0 |
| Mo | 2.8-3.3 |
| Cu | ≤0.30 |
| N | / |
| Nb | 4.75-5.50 |
| other | AI:0.20-0.80Ti:0.65-1.15B≤0.006 |
Application Field
Inconel 718 plate may be considered for components such as:
Aerospace and aircraft-engine components
Land-based gas-turbine parts
Rocket and liquid-fueled propulsion components
Cryogenic equipment and tankage
High-strength formed sheet or plate components
Fasteners and instrumentation components, when the selected product form is suitable
These are general application examples, not a qualification for a specific design or service environment. Hydrogen service, high-pressure equipment and pressure-vessel applications require engineering review against the applicable design code, material condition and test requirements.
DLX Advantage
CHANGZHOU DLX ALLOY CO, LTD was established in 2002 and has got Iso9001 International Quality Management System Certificate and SGS Certificate. Our factory is professional in researching and producing special alloy material. From melting, drawing, heat treatment, finishing and testing .We offer nickel-based, copper-based, and iron-based alloys, including super alloy, welding materials, anti-corrosion alloy, precision alloy, FeCrAl alloy, NiCr alloy, CuNi alloy, thermocouple and etc, in the form of wire, strip, ribbon, bar, tube, plate.
FAQ
Yes. Alloy 718 is precipitation hardenable. Mechanical properties depend on the specified heat-treatment condition and product requirements.
The alloy contains nickel, chromium, iron, niobium, molybdenum, titanium and aluminum within the limits of the applicable specification. Refer to the composition table above and verify the supplied heat analysis on the material test certificate.
This product listing does not establish qualification for a particular hydrogen pressure, storage vessel or design code. Suitability depends on material condition, stress, pressure cycles, environment and the applicable engineering requirements. Provide the design specification for technical review.
There is no single maximum service temperature applicable to every plate and design. Allowable temperature depends on the material condition, stress, service duration, environment and governing specification. Provide your operating conditions for review.
