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Jan 30, 2026

Comprehensive Guide to Inconel 718 Pipe

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
01.

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.

02.

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 Alloy Weldable
Inconel 718 pipes

 

What are Inconel 718 pipes and tubes?

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

Uns N07718 Tube

Nickel Alloy 718 Tubing

Nickel Alloy 718 Tubing

Alloy 718 Square Tube

Alloy 718 Square Tube

Alloy 718 Annealed Tube

Alloy 718 Annealed Tube

Inconel 718 pipe

Inconel 718 pipe

Alloy 718 Tube

Alloy 718 Tube

Alloy 718 Seamless Tubing

Alloy 718 Seamless Tubing

Ams 5590 Tube

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

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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

 

About 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.

Inconel 718 pipes packing
Inconel 718 pipes packing
Inconel 718 pipes shipped.
Inconel 718 pipes shipped

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