Inconel 625 Pipe & Tube
Inconel 625 pipe (UNS N06625, W.Nr 2.4856) is a nickel-chromium-molybdenum-niobium nickel-based alloy pipe featuring outstanding corrosion resistance, high-temperature strength, and excellent workability. Inconel Alloy 625 pipe requires no age hardening treatment and exhibits outstanding resistance in complex environments such as oxidizing, reducing, and chloride-containing media. It is widely used in high-end manufacturing sectors including aerospace, chemical processing, and nuclear power etc.
As a reliable provider of nickel-based alloy pipe and fittings, Kaysuns supplies both Inconel 625 seamless pipe and welded pipe for customer selection. All our pipes are manufactured in strict accordance with standards (ASTM, ASME, EN, GB) with flexible delivery time and order quantity.
- ASTM SB/B444 Seamless Pipe & Tube
- ASTM SB/B474 EFW Nickel Alloy Pipe
- ASTM SB/B704 Welded Alloy Tubes
- ASTM SB/B705 Nickel Alloy Welded Pipe
- AMS 5581 N06625
- EN 10216-5 2.4856
- DIN 17751 2.4856
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Inconel Alloy 625 Equivalent Materials
Alloy 625 is a very mature nickel-based alloy with a complete standard system, and there are clear equivalent grade in major standard systems.:
- Nickel Alloy 625 / Inconel 625
- ASTM B444 UNS N06625
- EN/DIN W.Nr 2.4856 / NiCr22Mo9Nb
- French AFNOR Z2NCD22-09Nb
- GB/T NS336
Chemical Composition of Inconel Alloy 625 Pipe (UNS N06625), wt.%
| Ni | Cr | Mo | Nb+Ta | Fe | C | Mn | Si | P | S | Al | Ti | Co |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ≥58.0 | 20.0–23.0 | 8.0–10.0 | 3.15–4.15 | ≤5.0 | ≤0.10 | ≤0.50 | ≤0.50 | ≤0.015 | ≤0.015 | ≤0.40 | ≤0.40 | ≤1.0 |
Mechanical Properties of Inconel 625 Pipe
| Grade | Tensile Strength | Yield Strength (0.2% Offset) | Elongation |
|---|---|---|---|
| Gr.1 | ≥ 827 MPa (120 ksi) | ≥ 414 MPa (60 ksi) | ≥ 30 % |
| Gr.2 | ≥ 690 MPa (100 ksi) | ≥ 276 MPa (40 ksi) | ≥ 30 % |
Delivery condition: Annealed / Solution Annealed .
What is the difference between N06625 Gr. 1 and Gr. 2
ASTM B444 N06625 (Inconel 625) seamless tubes has 2 grades: Grade 1 and Grade 2. This classification is fundamentally based on heat treatment conditions and applicable temperature ranges, with consistent chemical composition ranges. Differences primarily lie in heat treatment specifications, mechanical properties, allowable stresses, and suitable operating conditions.
| Comparison Dimension | N06625 Gr.1 | N06625 Gr.2 | Explanation |
|---|---|---|---|
| Heat Treatment Condition | Annealed | Solution Annealed | Different heat treatment practice |
| Chemical Composition (wt%) | Ni≥58.0, Cr20.0–23.0, Mo8.0–10.0, Nb+Ta3.15–4.15 | Same as Gr.1 | No chemical difference between grades |
| Mechanical Properties (RT) | σb≥827 MPa, σ0.2≥414 MPa, δ≥30% | σb≥965 MPa, σ0.2≥552 MPa, δ≥20% | Gr.2 provides higher strength |
| Allowable Stress | 30000 psi (207 MPa) | 25000 psi (172 MPa) | Design value difference |
| Service Temperature | ≤593 °C (1100 °F) | >593 °C (1100 °F) | Gr.2 preferred for high-temperature service |
| Microstructure Stability | Higher room-temperature strength | Better high-temperature stability | Depends on operating conditions |
| Typical Applications | Chemical piping, heat exchangers | Furnace tubes, hot pressure piping | Selection by temperature and stress |
| Cost & Availability | Standard supply | Higher cost, longer lead time | Specify grade clearly in PO |
Our Capacity
- Inconel 625 Seamless Pipe: 1/2“ – 18” / SCH10S – SCH160S
- Inconel 625 Welded Pipe: 8“ – 104” / SCH5S – SCH80S
- Inconel 625 Tubings: 6 mm – 305 mm / 0.8 mm ~ 12 mm
Application of Inconel 625 pipe
(I) Aerospace and Defense
- Engine Components: Combustion chamber liners, turbine blade outer rings, exhaust pipes—withstand high-temperature gas corrosion exceeding 1000°C, with tensile strength and fatigue performance meeting stringent engine requirements
- Aerospace Equipment: Rocket propulsion system piping, satellite structural components, combining lightweight properties with extreme environment tolerance
- Nuclear Industry: Pressurized water reactor coolant piping, nuclear power plant steam generator heat transfer tubes, resisting high-temperature, high-pressure water corrosion and radiation embrittlement
(II) Chemical and Petrochemical Industries
- Corrosive Environment Equipment: Hydrochloric/sulfuric acid production units, hydrogen fluoride synthesis reactors, seawater desalination reverse osmosis membrane modules, resisting chloride pitting and crevice corrosion
- Oil & Gas Exploration: Deepwater drilling risers, acid-resistant oil/gas well casings, withstanding H₂S/CO₂ corrosion and high-temperature/high-pressure conditions
- Flue Gas Desulfurization: Power plant desulfurization tower linings, flue ducts, resisting chlorine-containing acidic flue gas erosion
(III) High-End Manufacturing and Energy
- Electronics Industry: Vacuum chambers for semiconductor manufacturing equipment, ion implanter components, non-magnetic properties and high cleanliness meeting precision processing requirements
- New Energy: Hydrogen electrolyzer plates, high-temperature fuel cell bipolar plates, resistant to alkaline electrolyte corrosion and high-temperature oxidation
- Medical Devices: Artificial joint components, pacemaker housings—excellent biocompatibility and resistance to bodily fluid corrosion
(IV) Other Applications
- High-Temperature Equipment: Industrial furnace heating elements, heat treatment fixtures—continuous operating temperature up to 1093°C
- Offshore Engineering: Ship propeller shafts, corrosion-resistant marine platform components—resistance to seawater erosion and marine biofouling
We are an experienced Inconel 625 pipe supplier in China, boasting over 15 years of expertise in the research, production, and distribution of high-performance nickel-based alloy piping solutions. Our products includes both seamless and welded Inconel 625 pipes, as well as package supplying of inconel 625 fittings, flanges etc, available in a full range of custom diameters, wall thicknesses, and lengths to meet the stringent requirements of critical industries such as aerospace, oil and gas exploration, chemical processing, power generation, and marine engineering.
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- +86 577 8551 1171
- +86 135 8756 7332
- [email protected]
- www.kaysuns.com
