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Inconel 600,601,617,625,690,718,X750
DLX
Bright Annealed
Customized
8.4g/cm3
965
ISO9001, ROHS
3kg
1290-1350℃
5-20 Days
Industry
Ni Cr Fe Nb Mo
Product Description
Inconel 718 is one of the most widely used precipitation-hardened nickel-based superalloys, accounting for over 30% of global superalloy usage in high-performance applications. Developed specifically to withstand hydrogen-induced cracking and stress corrosion in aggressive hydrogen environments, DLX Inconel 718 round bars provide unmatched combination of high strength, fatigue resistance, and corrosion resistance for the rapidly growing hydrogen energy industry.
As global demand for green hydrogen storage and transportation surges, Type III and Type IV composite hydrogen tanks require liner materials or structural components that resist high-pressure gaseous hydrogen (up to 700-1000 bar) without embrittlement. Inconel 718 excels in these conditions, offering superior weldability, creep resistance, and low hydrogen permeability compared to stainless steels or other nickel alloys.
High nickel matrix minimizes hydrogen diffusion and trapping, preventing brittleness and cracking in high-pressure hydrogen environments.
Resists pitting, crevice corrosion, and stress corrosion cracking in chloride-bearing or sour hydrogen environments.
Yield strength up to 517 MPa (annealed) and excellent fatigue resistance, maintaining properties from cryogenic to 980°C.
Forms a protective oxide layer, ideal for hydrogen production and reforming processes.
Easily welded without post-weld heat treatment, supporting complex vessel and pipeline fabrication.
Specification
| Inconel Size Range | |
| Wire | 0.05-8.0mm |
| Rod/Bar | 8.0-200mm |
| Strip | (0.05-0.5)*(5-200)mm |
| Plate | custom made |
| Tube | custom made |
| Density | 8.40 g/cm3 |
| Ultimate Strength (≥ MPa) | 700 |
| Tensile Strength σb/MPa | 760 |
| Elongation δ5 (%) | 30 |
| Yield Strength σp0.2/MPa | 345 |
| Melting point | 1290-1350°C |
| 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 |
Inconel Bars 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 vessels (700 bar Type III/IV tanks)
Liquid hydrogen (LH2) cryogenic storage tanks and dewars
Hydrogen transportation tube trailers and pipelines
Hydrogen compressor components and valve stems
Fuel cell bipolar plates and stack structural parts
Hydrogen refueling station pressure regulators and fittings
On-board vehicle hydrogen tanks for fuel cell electric vehicles (FCEV)
Gaseous hydrogen cylinders for stationary power generation
Inconel 718 is widely specified for next-generation hydrogen infrastructure, offering a safer alternative to conventional alloys prone to hydrogen damage.
About us
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
Inconel 718 offers significantly better hydrogen embrittlement resistance than Inconel 718 due to its non-age-hardenable structure and higher molybdenum/niobium content, reducing susceptibility to intergranular cracking in high-pressure hydrogen.
Yes, its proven performance in high-pressure gaseous hydrogen environments (with minimal relative reduction in area loss) makes it ideal for modern hydrogen vessels and pipelines.
Solution annealing at 1093°C followed by rapid cooling is recommended to maximize corrosion and HE resistance. DLX Alloy can supply material in this optimized condition.
We welcome factory visits! Tour our state-of-the-art facility in Jiangsu, China, to see our Inconel X-750 round bar production firsthand. Schedule a visit to discuss custom orders, witness quality checks, and build a stronger partnership. Travel assistance available upon request.
Yes, we provide samples of Inconel 718 Bar/Rod for evaluation.
