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Inconel 625/718
DLX
bright
ISO9001
5kg
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.
Excellent performance in high-pressure gaseous hydrogen environments, minimizing cracking and degradation common in lesser alloys.
Precipitation hardening provides yield strength up to 1200 MPa (aged condition), ideal for lightweight yet robust high-pressure hydrogen storage tanks.
Retains mechanical properties from cryogenic temperatures to 700°C, suitable for both liquid and compressed gaseous hydrogen systems.
Resists pitting, crevice corrosion, and stress corrosion cracking in moist H2S or chloride-contaminated hydrogen settings.
Can be easily formed, welded (even in aged condition), and machined for complex hydrogen vessel components.
Gamma double-prime (γ″) strengthening ensures durability under repeated pressurization/depressurization cycles in hydrogen transport.
Specification
| Steel grade | Inconel 600 | Inconel 601 | Inconel 625 | Inconel 718 | Inconel 725 | Inconel X-750 |
| Corresponding brand | N06600/2.4816 /1Cr15Ni75Fe8 /NS312/CY40 | N06601/2.4851 /1Cr23Ni60Fe13AI /NS313 | N06625/2.4856/0Cr20Ni65Mo10bN4/NS336 | N07718/2.466 8/GH4169 | N07725 | N07750 /2.466 9/GH4145 |
Chemical composition%
| Steel grade | Inconel 600 | Inconel 601 | Inconel 625 | Inconel 718 | Inconel 725 | Inconel X-750 |
| C≤ | 0.150 | 0.100 | 0.100 | 0.080 | 0.030 | 0.080 |
| Mn≤ | 1.00 | 1.00 | 0.50 | 0.35 | 0.35 | 1.00 |
| P≤ | / | / | 0.015 | 0.015 | 0.015 | / |
| S≤ | 0.015 | 0.015 | 0.015 | 0.015 | 0.010 | 0.010 |
| Si≤ | 0.50 | 0.50 | 0.50 | 0.35 | 0.20 | 0.50 |
| Cr≤ | 14.0-17.0 | 21.0-25.0 | 20.0-23.0 | 17.0-21.0 | 19.0-22.5 | 14.0-17.0 |
| Ni≤ | ≥72.0 | 58.0-63.0 | ≥58.0 | 55.0-59.0 | 55.0-59.0 | ≥70 |
| Mo | / | / | 8.0-10.0 | 2.8-3.3 | 7.0-9.5 | / |
| Cu | ≤0.50 | ≤1.50 | / | ≤0.30 | / | ≤0.50 |
| N | / | / | / | / | / | / |
| Nb | / | / | 3.15-4.15 | 4.75-5.50 | 2.75-4.00 | 0.70-1.20 |
| other | Fe:6.0-10.0 | Al:1.0-1.7 | Co:≤1.0Ai:≤0.4 0Tr:0.40Fe:≤5.0 | AI:0.20-0.80Ti:0.65-1.15B≤0.006 | Tr:1.0-1.7AI≤0.35 | Co:≤1.0 AI:0.4-1.0Tr:0.25-2.75Fe:5.0-9.0 |
Application Field
High-Pressure Hydrogen Storage Tanks: Primary material for metallic liners in Type IV composite cylinders (700 bar onboard storage for FCEVs).
Hydrogen Transportation Pipelines and Trailers: High-strength plates for tube trailers and stationary storage vessels handling compressed hydrogen.
Hydrogen Refueling Station Components: Valves, fittings, and pressure accumulators exposed to ultra-high-pressure gaseous hydrogen.
Solid-State Hydrogen Storage Systems: Structural components requiring resistance to hydrogen permeation and embrittlement.
Fuel Cell Vehicle (FCEV) Tanks: Lightweight, high-safety overwind pressure vessels meeting ISO 19881 and SAE J2579 standards.
Renewable Energy Hydrogen Production: Electrolyzer pressure vessels and storage in green hydrogen plants.
Inconel 718 outperforms traditional stainless steels and even Inconel 625 in high-strength, high-cycle hydrogen service, reducing weight while enhancing safety.
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
Factory Direct Supply with Competitive Wholesale Prices
Custom Sizes & Large Stock Availability
Fast Global Shipping & Reliable Industrial Supply
Guaranteed High Purity for Electronic & Industrial Applications
Delivery for Inconel 601 Pipe typically takes 10-30 days for small orders, depending on quantity. Large orders may require up to 60 days for production and shipping.
Yes, we accept OEM/ODM production for Inconel 718 Sheet/Plate. Simply send us your samples or drawings to get started.
Our professional team offers one-on-one support for pre-sale consultations and after-sale queries on Inconel 718 Sheet/Plate. We're here to ensure your needs are fully met.
Yes, you're welcome to visit our factory before ordering Inconel 718 Sheet/Plate. It's a great opportunity to connect and discuss your requirements.
Our production base for Inconel 718 Sheet/Plate is in Jiangsu, China, with efficient shipping worldwide based on your order size and specs.
Yes, we can send samples of Inconel 718 Sheet/Plate for your evaluation. Contact us to arrange.
