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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 625 (UNS N06625) is a solid-solution strengthened nickel-based superalloy renowned for its outstanding combination of high tensile strength, fatigue resistance, and resistance to oxidation and corrosion. In the rapidly growing hydrogen energy industry, where materials must withstand high-pressure gaseous hydrogen (up to 700-1000 bar) without succumbing to hydrogen embrittlement (HE), Inconel 625 bars and rods stand out as a preferred choice.
Unlike many steels and even some nickel alloys, Inconel 625 exhibits superior hydrogen embrittlement resistance due to its high nickel content (>58%), molybdenum, and niobium stabilization. This makes it ideal for critical components in hydrogen storage tanks, hydrogen transport trailers, and hydrogen refueling station vessels. DLX Alloy's Inconel 625 bars are manufactured using advanced vacuum induction melting and electroslag remelting processes to ensure ultra-low impurities and consistent microstructure, providing long-term durability in clean hydrogen energy applications.
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
Liner material or structural components for Type III/IV composite tanks, ensuring safety under 700+ bar.
Valves, fittings, and tube components resistant to hydrogen-induced cracking during long-haul transport.
Pressure accumulators, diaphragms, and compressors exposed to cyclic high-pressure hydrogen.
Reformer tubes, heat exchangers, and vessel internals in steam methane reforming or electrolysis systems.
Components requiring strength and HE resistance across wide temperature ranges.
Inconel 625 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 625 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 625 Bar/Rod for evaluation.
