Gnee Steel is a supplier, exporter, trader, and developer of Inconel 718 pipes in the Chinese market. Gnee Steel is committed to providing high-quality products to meet customer needs. We offer Inconel 718 and Inconel 800 pipes in various outer diameters, surface finishes, types, shapes, and thicknesses. Gnee Steel can also customize pipe production according to customer requirements. Our products comply with international standards, have low maintenance costs, and are easy to install.
Comprehensive Guide to Inconel 718 Pipe

Comprehensive Guide to Inconel 718 Pipe
Inconel 718 alloy tubing is a high-strength nickel-chromium-based superalloy (Ni-Cr-Fe-Nb-Mo) designed for extreme environments, exhibiting excellent corrosion resistance and stability across a temperature range from cryogenic temperatures to 700°C (1300°F). It is widely used in aerospace, oil and gas, and power generation industries for manufacturing components requiring extremely high creep rupture strength.
Is Inconel 718 alloy weldable?
Inconel 718 alloy exhibits excellent weldability in both age-hardened and annealed states. However, despite its strong resistance to strain-age cracking, some welding issues can still occur, such as microcracking and solidification cracking.


Inconel 718 tubing is a nickel-chromium alloy tube containing significant amounts of molybdenum, niobium, and iron, which give it exceptional strength and corrosion resistance. It is particularly known for its high-temperature resistance, capable of withstanding temperatures up to 700°C (1290°F) while maintaining excellent mechanical properties. This makes Inconel 718 alloy tubing an ideal choice for applications requiring high strength and corrosion resistance in corrosive environments.
The unique properties of Inconel 718 thick-walled tubes stem from its precipitation hardening mechanism, which involves the formation of γ' and γ'' phases in its microstructure. These phases impart exceptional tensile strength, creep resistance, and stress rupture properties to the alloy. Pipes and tubes made from this alloy are manufactured through a series of processes, including cold working, annealing, and precipitation hardening, which optimize their mechanical and physical properties, making them suitable for applications under extreme conditions.
Specification Of Inconel 718 Pipes
| Specifications : | ASTM B163, B167, B444, B704 / ASME SB163, SB167, SB444, SB704 |
|---|---|
| Seamless Size : | 1 / 8" NB - 24" NB |
| ERW Size : | 1 / 8" NB - 36" NB |
| EFW Size : | 6" NB - 100" NB |
| Outer Diameter : | 6.00 mm OD up to 914.4 mm OD, Sizes up to 24" NB |
| Length : | Single Random, Double Random & Required Length |
| Schedule : | SCH20, SCH30, SCH20, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS |
| Types : | Seamless / ERW / EFW / Welded / Fabricated / LSAW Pipes |
| Form : | Round Pipes/Tubes, Square Pipes/Tubes, Rectangular Pipe/Tubes, Coiled Tubes, "U" Shape, Pan Cake Coils, Hydraulic Tubes |
718 alloy pipe inventory types

Uns N07718 Tube

Nickel Alloy 718 Tubing

Alloy 718 Square Tube

Alloy 718 Annealed Tube

Inconel 718 pipe

Alloy 718 Tube

Alloy 718 Seamless Tubing

Ams 5590 Tube
Size table of Alloy 718 Seamless Pipe
Alloy718 seamless Pipe
Size:15" to 150″NB Inch
Wall Thikness: 0.5 to 20mm
Equivalent Grades Of Inconel 718 Tubes
| Grade | UNS | DIN | AFNOR | EN | JIS | BS | GOST | OR |
|---|---|---|---|---|---|---|---|---|
| Inconel 718 | N06718 | 2.4856 | NC22DNB4M | NiCr22Mo9Nb | NCF 718 | NA 21 | ХН75МБТЮ | ЭИ602 |
Chemical Composition Of Inconel 718 Pipes
| Grade | C | Mn | Si | S | Cu | Fe | Ni | Cr |
|---|---|---|---|---|---|---|---|---|
| 718 | 0.10 | 0.50 | 0.50 | 0.015 | - | 5.0 | 58.0 min | - |
Mechanical Properties Of Inconel 718 Tubes
| Grade | Density | Melting Point | Yield Strength (0.2%) Offset | Tensile Strength | Elongation |
|---|---|---|---|---|---|
| 718 | 8.4 g/cm3 | 1350 °C (2460 °F) | Psi - 75,000 , MPa - 517 | Psi - 1,35,000 , MPa -930 | 42.5 % |
Inconel 718 Seamless Tube Dimensions
| Wall | Sizes ( O.D.) |
|---|---|
| .010 | 1/16" , 1/8" , 3/16" |
| .020 | 1/16" , 1/8" , 3/16" , 1/4" , 5/16" , 3/8" |
| .012 | 1/8" |
| .016 | 1/8" , 3/16" |
| .028 | 1/8" , 3/16" , 1/4" , 5/16" , 3/8" , 1/2" , 3/4" , 1" , 1 1/2" , 2" |
| .035 | 1/8" , 3/16" , 1/4" , 5/16" , 3/8" , 7/16" , 1/2" , 16" , 5/8" , 3/4" , 7/8" , 1" , 1 1/4" , 1 1/2" , 1 5/8" , 2" , 2 1/4" |
| .049 | 3/16" , 1/4" , 5/16" , 3/8" , 1/2" , 16" , 5/8" , 3/4" , 7/8" , 1" , 1 1/8" , 1 1/4" , 1 1/2" , 1 5/8" , 2" , 2 1/4" |
| .065 | 1/4" , 5/16" , 3/8" , 1/2" , 16" , 5/8" , 3/4" , 7/8" , 1" , 1 1/4" , 1 1/2" , 1 5/8" , 1 3/4" , 2" , 2 1/2" , 3" |
| .083 | 1/4" , 3/8" , 1/2" , 5/8" , 3/4" , 7/8" , 1" , 1 1/4" , 1 1/2" , 1 5/8" , 1 7/8" , 2" , 2 1/2" ,3" |
| .095 | 1/2" , 5/8" , 1" , 1 1/4" , 1 1/2" , 2" |
| .109 | 1/2" , 3/4" , 1" , 1 1/4" , 1 1/2" , 2" |
| .120 | 1/2" , 5/8" , 3/4" , 7/8" , 1" , 1 1/4" , 1 1/2" , 2" , 2 1/4" , 2 1/2" , 3" |
| .125 | 3/4" , 1" , 1 1/4" , 1 1/2" , 2" , 3" , 3 1/4" |
| .134 | 1" |
| .250 | 3" |
| .375 | 3 1/2" |
Alloy 718 Seamless Tubing Wall Thickness
| Types of inconel 718 Tube | Out diameter (OD) | Wall thickness | Length |
|---|---|---|---|
| NB Sizes (in stock) | 1/8" ~ 8" | SCH 5 / SCH 10 / SCH 40 / SCH 80 / SCH 160 | Upto 6 Meters |
| inconel 718 Seamless Tube (Custom Sizes) | 5.0mm ~ 203.2mm | As per requirement | Upto 6 Meters |
| inconel 718 Welded Tube (in Stock + Custom Sizes) | 5.0mm ~ 1219.2mm | 1.0 ~ 15.0 mm | Upto 6 Meters |
Latest price list for Inconel 718 pipes and tubing

Gnee Steel is one of China's leading manufacturers and suppliers of Inconel 718 pipes, Inconel 718 tubes (priced per kilogram), Nickel Alloy 718 standard pipes, seamless Nickel Alloy UNS N06718 pipes and tubes, and welded Nickel Alloy UNS N06718 pipes and tubes. For the best prices on Inconel pipes and tubes in India, choose Gnee Steel.

Gnee Steel is a professional manufacturer of various nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel Alloy 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy Alloy 800, Incoloy 800H/HT, Incoloy 825, Monel Alloy 400, Monel K500, and high-temperature alloys. We specialize in the production and sales of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, power, automotive, and nuclear energy industries, and we can provide customized alloy material solutions according to customer needs. For alloy material price inquiries or to request customized alloy material solutions, please feel free to contact us at ru@gneesteelgroup.com for a quote.



