Inconel Alloy 718 Pipe
Inconel Alloy 718 Pipe Composition Information
Inconel 718 tubing is a precipitation-hardening nickel-chromium alloy with an approximate composition of 50-55% nickel, 17-21% chromium, 2.8-3.3% molybdenum, 4.75-5.5% niobium and tantalum, 0.65-1.15% titanium, 0.20-0.80% aluminum, and the balance iron. It also contains trace amounts of other elements, such as carbon, manganese, silicon, phosphorus, sulfur, boron, cobalt, and copper, all within specified limits. This composition combines high strength with creep resistance and good high-temperature ductility, along with excellent low-temperature properties.
Why is Inconel 718 difficult to machine?
The excellent high-temperature properties of the nickel-based superalloy Inconel 718 have led to its widespread use in the aviation, marine, and automotive industries. However, Inconel 718's poor thermal conductivity and rapid strain hardening result in poor machinability and surface integrity.
Inconel Alloy 718 Tubes Specifications
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ASTM B163, B516 / ASME SB163, B516 |
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Alloy 718 Tubes Size |
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6 mm OD x 0.7 mm to 50.8 mm OD x 3 mm thk. |
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SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS |
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Single Random, Double Random & Cut Length. |
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718 Inconel Alloy Tube Chemical Composition
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C |
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S |
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Inconel 718 |
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0.35 max |
0.35 max |
0.015max |
0.30 max |
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50.00 – 55.00 |
17.00 – 21.00 |
Inconel 718 Tubing Mechanical Properties
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Yield Strength (0.2%Offset) |
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Inconel 718 |
8.2 g/cm3 |
1350 ℃ (2460 ℃F) |
Psi – 1,35,000 , MPa – 930 |
Psi – 75,000 , MPa – 482 |
45 % |
Tolerance of Inconel 718 Tube
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O.D. INCHES |
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O.D. +/- INCHES |
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1/2″ to 1″ incl. |
.025 to .065 |
.005 |
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Over .065 to .134 |
.010 |
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1 to 1-1/2″ incl. |
.025 to .065 |
.008 |
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Over .065 to .134 |
.010 |
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1-1/2″ to 2″ incl. |
.025 to .049 |
.010 |
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Over .049 to .083 |
.011 |
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Over .083 to .148 |
.012 |
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2″ to 2-1/2″ incl. |
.032 to .065 |
.012 |
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Over .065 to .109 |
.013 |
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Over .109 to .165 |
.014 |
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2-1/2″ to 3-1/2″ incl. |
.032 to .165 |
.014 |
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Over .165 to .220 |
.020 |
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3-1/2″ to 5″ incl. |
.083 to .165 |
.020 |
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Over .165 to .220 |
.025 |
Gnee Steel specializes in the production and sale 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. Gnee Steel's products are widely used in aerospace, chemical, electric power, automotive, and nuclear energy applications, and we can provide customized alloy solutions tailored to customer needs. For alloy pricing inquiries or customized alloy solutions, please contact us for a quote at ss@gneemetal.com.
