Gnee is committed to providing customers with UNS N07718 Inconel 718 seamless and welded pipes that meet international and national quality standards at affordable prices. These products are available in various sizes, specifications, and shapes, conforming to standards such as ASTM B704/B705, and offer excellent corrosion resistance. All at competitive prices!
Inconel 718 Pipe Suppliers
As a professional Inconel 718 pipe supplier and manufacturer, Gnee Alloys produces the highest-quality ASME SB 163 Inconel 2.4668 alloy. We meet most ASME, ASTM, and other specifications, making our Inconel 718 tube products suitable for a wide range of industrial applications.
We follow standard production processes and conduct extensive testing to verify product quality and performance. We also offer customized products based on customer needs. Gnee’s factory boasts comprehensive cold rolling, cold drawing, annealing, and pickling equipment to meet any size and performance requirements. While maintaining high product quality, we guarantee on-time delivery within the customer’s specified timeframe.
| Types | Inconel 718 seamless pipe, welded pipe, ERW pipe, EFW pipe, etc. |
|---|---|
| Forms | Round pipe, Square Pipe, Rectangular, Hydraulic, etc. |
Available Types of Inconel 718 Pipes & Tubes
Gnee provide aerospace-grade Inconel 718 seamless pipes, welded pipes, and custom size pipe/tubes, ensuring end-to-end solutions from prototyping to mass production. We support third-party inspection: optional NDE (non-destructive testing), including hydrostatic, ultrasonic and eddy current testing
Inconel 718 ERW Pipe 
718 Seamless Pipe 
Alloy 718 Round Pipe 
718 Inconel Polish Pipe 
718 Welded Pipe 
718 Alloy Square Pipe 
718 Condenser Pipe 
718 ERW Welded Pipe
Basic Information Of UNS N07718 Pipe
The following is the product specifications of Alloy 718 pipe/tube that Gnee Alloy can provide. If you need more information, please contact us
Description
Inconel 718 is an austenitic nickel-base superalloy primarily composed of nickel (Ni) and chromium (Cr). It is a precipitation-strengthened high-temperature alloy. Renowned for its durability and superior surface finish, Inconel 718 pipe withstands both severe low-temperature corrosion and adverse high-temperature conditions. This alloy is often used in components that must withstand stress at high temperatures. Consequently, Inconel 718 pipe is commonly used in cryogenic storage tanks, downhole shafts, wellhead components, jet rockets, nuclear fuel, and pump components.
As a specialized supplier of high-temperature alloys, we produce high-performance Inconel 718 (UNS N07718) seamless and welded pipe. Our ASTM B163 Inconel 718 pipe can withstand extremely high pressures, offers excellent weldability, and comes with a product warranty.
Inconel 718 Pipe Product Parameters
| Grade | Inconel 718 |
| Standard | ASTM B163, B670, B161, B725, B730 / ASME SB163, SB670, SB161, SB725, SB730 |
| Inconel 718 Seamless Pipes | 1/4″ NB To 6″ NB |
| Inconel 718 Welded / ERW Pipes | 1″ NB To 16″ NB |
| Form | Round, Square, Rectangular, Hydraulic Etc |
| Schedule | SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS |
| Length | Single Random, Double Random & Cut Length. |
| Type | Seamless / ERW / Welded / Fabricated / EFW |
| End | Plain End, Beveled End, Treaded |
What ASTM standards of Inconel 718 Tube can Gnee produce?
| ASTM Standard | Description |
| ASTM B704/B705 | Standard Specification for Welded and Seamless Nickel-Alloy Pipe |
| ASTM B906 | Standard Specification for General Requirements for Flat-Rolled Nickel and Nickel Alloys Plate, Sheet, and Strip |
| ASTM B829 | Standard Specification for General Requirements for Nickel and Nickel Alloys Seamless Pipe and Tube |
| ASTM B775/B776 | Standard Specification for General Requirements for Nickel and Nickel Alloys Welded Pipe and Tube |
Equivalent Grades Of Alloy 718 Pipe
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
| Inconel 718 | 2.4668 | N07718 | NCF 718 | – | – | – | – |
We provide Inconel 718 Pipe surface treatment services
- Shot peening
- Electrolytic polishing
- Electroless nickel plating
- Acid pickling and passivation
- High-performance coating
Parameter Information
Inconel UNS N07718 Pipes & Tubes Chemical Composition
| Inconel 718 | Min | Mix |
| Ni | 50 | 55 |
| C | – | 0.08 |
| Mn | – | 0.35 |
| Co | – | 1 |
| Si | – | 0.35 |
| Cr | 17 | 21 |
| Fe | balance | balance |
| Al | 0.2 | 0.8 |
| Ti | 0.7 | 1.15 |
| cu | – | 0.3 |
| Mo | 2.8 | 3.3 |
| Nb | 4.75 | 5.5 |
| S | – | 0.01 |
Mechanical & Physical Properties of Inconel 718 Pipes & Tubes
| Density | 8.2 g/cm3 |
| Melting Point | 1350 °C (2460 °F) |
| Tensile Strength | Psi – 1,35,000 , MPa – 930 |
| Yield Strength (0.2%Offset) | Psi – 75,000 , MPa – 482 |
| Elongation | 45% |
Inconel 718 Pipes Tolerances Chart
| O.D. INCHES | WALL THICKNESS INCHES | O.D. +/- INCHES |
| 1/2″ to 1″ incl. | .025 to .065 | 0.005 |
| Over .065 to .134 | 0.01 | |
| 1 to 1-1/2″ incl. | .025 to .065 | 0.008 |
| Over .065 to .134 | 0.01 | |
| 1-1/2″ to 2″ incl. | .025 to .049 | 0.01 |
| Over .049 to .083 | 0.011 | |
| Over .083 to .148 | 0.012 | |
| 2″ to 2-1/2″ incl. | .032 to .065 | 0.012 |
| Over .065 to .109 | 0.013 | |
| Over .109 to .165 | 0.014 | |
| 2-1/2″ to 3-1/2″ incl. | .032 to .165 | 0.014 |
| Over .165 to .220 | 0.02 | |
| 3-1/2″ to 5″ incl. | .083 to .165 | 0.02 |
| Over .165 to .220 | 0.025 |
Inconel 728 Pipe/Tube Size Chart
| Gauge | Outside Diameter Tolerance mm | Regular Wall (RW) mm | Thin Wall (TW) mm | Extra Thin Wall (XTW) mm | Ultra Thin Wall (UTW) mm |
| 30 | 0.304 – 0.317 | 0.064 – 0.089 | |||
| 29 | o.330 – 0.342 | 0.064 – 0.089 | |||
| 28 | 0.355 – 0.368 | 0.076 – 0.102 | |||
| 27 | 0.406 – 0.419 | 0.089 – 0.115 | 0.064 – 0.089 | ||
| 26 | 0.457 – 0.469 | 0.089 – 0.114 | |||
| 25 | 0.508 – 0.520 | 0.115 – 0.140 | 0.089 – 0.114 | ||
| 24 | 0.558 – 0.571 | 0.114 – 0.140 | 0.089 – 0.114 | 0.051 – 0.102 | |
| 23 | 0.635 – 0.647 | 0.140 – 0.165 | 0.089 – 0.114 | 0.051 – 0.102 | |
| 22 | 0.711 – 0.723 | 0.140 – 0.165 | 0.096 – 0.121 | 0.077 – 0.102 | 0.051 – 0.102 |
| 21 | 0.812 – 0.825 | 0.140 – 0.165 | 0.102 – 0.127 | 0.051 – 0.102 | |
| 20 | 0.901 – 0.914 | 0.108 – 0.165 | 0.108 – 0.134 | ||
| 19 | 1.054 – 1.079 | 0.166 – 0.216 | 0.102 – 0.140 | 0.070 – 0.108 | |
| 18 | 1.257 – 1.282 | 0.191 – 0.241 | 0.127 – 0.165 | 0.083 – 0.121 | 0.051 – 0.102 |
| 17 | 1.460 – 1.485 | 0.177 – 0.229 | 0.115 – 0.152 | 0.083 – 0.127 | 0.057 – 0.102 |
| 16 | 1.638 – 1.663 | 0.204 – 0.254 | 0.127 – 0.165 | 0.096 – 0.133 | 0.070 – 0.121 |
| 15 | 1.816 – 1.841 | 0.204 – 0.254 | 0.127 – 0.165 | 0.096 – 0.134 | 0.070 – 0.121 |
| 14 | 2.082 – 2.133 | 0.216 – 0.292 | 0.165 – 0.229 | 0.114 – 0.165 | 0.076 – 0.134 |
| 13 | 2.387 – 2.438 | 0.267 – 0.343 | 0.191 – 0.267 | ||
| 12 | 2.743 – 2.749 | 0.267 – 0.321 | |||
| 11 | 3.023 – 3.073 | 0.293 – 0.368 | 0.216 – 0.292 | ||
| 10 | 3.378 – 3.429 | 0.318 – 0.394 | 0.216 – 0.292 |
Features And Applications
Features and advantages of Alloy 718 Pipes
The characteristics and advantages of Inconel 718 pipe stem from its unique chemical composition and heat treatment process.
- Excellent high-temperature strength and creep resistance: It maintains extremely high mechanical strength at high temperatures. It exhibits excellent creep resistance, meaning it is less susceptible to slow plastic deformation under prolonged high temperatures and stress.
- Excellent corrosion resistance: It maintains good oxidation resistance up to 1300°F. It offers excellent resistance to acids, alkalis, and salts, and its resistance to stress corrosion cracking in chloride-containing environments is far superior to that of ordinary stainless steel.
- Great fatigue resistance and weldability: It exhibits excellent fatigue resistance under alternating loads and high temperatures, and is not susceptible to cracking due to cyclic stress. It also exhibits excellent weldability and a low tendency to post-weld cracking, typically resisting cracking even after direct aging treatment.
- Excellent machinability: This is a significant advantage of Inconel 718 over other high-performance nickel-based alloys, such as Inconel 625. It is relatively soft in its solution state, making it easy to form and machine using both cold and hot working methods. It can then be aging treated to achieve ultra-high strength.
- Great low-temperature performance: Its toughness does not significantly decrease at low temperatures, making it suitable for use in ultra-low-temperature environments, such as liquid nitrogen and liquid hydrogen.
Applications of Inconel 718 Pipe
Our Inconel 718 pipe is widely used in the oil and gas, petrochemical, pharmaceutical, food, paper, machinery, and natural gas industries.
Aerospace
- Engine Components: Piping systems for key hot-end components such as high-pressure compressor disks, casings, blades, combustion chambers, and afterburners in jet engines and gas turbines.
- Rocket Engines: Liquid fuel delivery pipelines and combustion chamber liners.
Oil and Gas Industry
- High-Temperature and High-Pressure Downhole Tools: Armored logging cables, completion equipment (such as packers and safety valves), and downhole sensor housings.
- Surface Equipment: For high-pressure, highly corrosive oil and gas pipelines.
Energy and Chemical Industry
- Nuclear Power Equipment: Coolant piping and heat exchanger tubes for nuclear reactors.
- Chemical Processing: Reactors, heat exchangers, and connecting pipes used to handle highly corrosive chemicals.
- Gas Turbines: Hot-path components and piping for heavy-duty gas turbines used for ground-based power generation.
Other High-Tech Fields
- Automotive Racing: Turbocharger wastegates and exhaust pipes for high-performance racing cars.
- Heat Treatment Industry: Radiant tubes and muffles for high-temperature furnaces.
Why Choose Inconel 718 Pipe from Gnee？
Gnee has been deeply involved in the field of high-temperature alloys for more than 20 years. We offer the best-selling and abundantly stocked Inconel 718 alloy according to customer needs.
To meet the stringent requirements of Inconel 718 pipes for high-end applications such as aerospace, deep-sea oil and gas exploration, and advanced nuclear power heat exchange systems, we leverage our vertically integrated supply chain to independently control the entire process: vacuum induction melting – vacuum arc remelting – hot extrusion/piercing – cold rolling and finishing – solution treatment and aging. We control alloy purity from the source and precisely respond to customized requirements.
We support custom specifications with outer diameters from 6mm to 219mm and wall thicknesses from 1mm to 30mm, and can adjust the solution treatment and aging process to suit specific application conditions. We also provide complete material certification documentation. Contact us for a quote!
Gnee Alloys-nickel alloy Rich Grades For Sale
In addition to Inconel 718, we can also provide the following grades of nickel-based alloys
FAQ
Below are some frequently asked questions about Alloy 718 tube. If you have any other questions, please feel free to contact us.
English 
Spanish 
Arabic 
Indonesian 
Turkish 
Russian 
Portuguese 
French 
Persian