Inconel 718 pipe is a high-strength nickel-chromium-molybdenum alloy pipe with outstanding tensile strength and creep resistance at temperatures up to 1300°F (704°C). It is widely used in aerospace, gas turbine, and cryogenic applications, as well as in chemical and petrochemical processing where high strength combined with resistance to corrosion and oxidation is required.
Inconel 718 pipes are available in seamless and welded forms across a range of outside diameters and wall thicknesses. The appropriate form and specification depend on operating temperature, pressure, service environment, and applicable standards such as ASTM B983 and ASME SB983.
Spark Steel supplies Inconel 718 pipes in ERW, seamless, fabricated, welded, and LSAW types. Pipe ends include plain, beveled, and threaded options, with surface finishes including polished, BA (bright and annealed), AP (annealed and pickled), No.4, No.1, mirror, and hairline.
Specification of Inconel 718 pipe
Specification of Inconel 718 pipe
| SPECIFICATION | DETAILS |
|---|---|
| Size | 15"NB – 150"NB |
| Temperature range | up to 1300oF |
| End | Plain, Beveled, Treaded |
| Finish | Polished, BA (Bright & Annealed), AP (Annealed & Pickled), MF, 8K, NO.4, NO.1, 2B, HL, BA, Mirror finish |
| Form | Round, Rectangular, Square, Hydraulic |
| Types | ERW / Seamless / Fabricated / Welded / LSAW |
Inconel 718 seamless pipe applications
- Heat exchangers
- Mandrels
- Valves
ASTM B163 UNS N07718 welded pipes size chart
ASTM B163 UNS N07718 welded pipes size chart
| OD mm |
Pipe WT mm |
Kg/m | in. | Sch |
|---|---|---|---|---|
| 101.60 | 3.05 | 7.53 | 3½ | 10S |
| 88.90 | 3.05 | 6.56 | 3 | 10S |
| 73.03 | 3.05 | 5.35 | 2½ | 10S |
| 60.33 | 2.77 | 3.99 | 2 | 10S |
| 48.26 | 2.77 | 3.16 | 1½ | 10S |
| 219.08 | 23.012) | 112.97 | 8 | 160 |
| 168.28 | 3.4 | 14.04 | 6 | 10S |
| 141.30 | 6.55 | 22.10 | 5 | 40S |
| 141.30 | 6.55 | 22.10 | 5 | 40S |
| 114.30 | 3.05 | 8.50 | 4 | 10S |
| 42.16 | 2.77 | 2.73 | 1¼ | 10S |
| 33.40 | 2.77 | 2.13 | 1 | 10S |
| 26.67 | 2.11 | 1.30 | 3/4 | 10S |
| 21.34 | 2.11 | 1.02 | 1/2 | 10S |
| 17.15 | 1.65 | 0.64 | 3/8 | 10S |
| 13.72 | 1.65 | 0.50 | 1/4 | 10S |
Manufacturing process of Nickel alloy 718 polished pipe
ASTM B516 Werkstoff Nr.2.4668 ERW pipe weight chart
ASTM B516 Werkstoff Nr.2.4668 ERW pipe weight chart
| NPS | Weight | Wall Thickness | Outside Diameter | Weight | |||
|---|---|---|---|---|---|---|---|
| kg/Mtr | in | mm | in | mm | Sched | Lb/ft | |
| 16” | 47.290 | 0.188 | 4.775 | 16.000 | 406 | 21.748 | |
| 2″ | 5.441 | 0.154 | 3.912 | 2.375 | 60 | 40 STD | 3.653 |
| 24″ | 94.456 | 0.250 | 6.350 | 24.000 | 610 | 63.413 | |
| 3″ | 11.284 | 0.216 | 5.486 | 3.500 | 89 | 40 STD | 7.576 |
| 2 1/2″ | 8.629 | 0.203 | 5.516 | 2.875 | 73 | 40 STD | 5.793 |
| 4″ | 16.073 | 0.237 | 6.020 | 4.500 | 114 | 10.790 | |
| 30″ | 118.318 | 0.250 | 6.350 | 30.000 | 762 | 79.433 | |
| 6″ | 19.252 | 0.188 | 4.775 | 6.625 | 168 | 12.924 | |
| 18″ | 61.948 | 0.219 | 5.563 | 18.000 | 457 | 41.588 | |
| 1/2″ | 1.268 | 0.109 | 2.769 | 0.840 | 21 | 40 STD | 0.851 |
| 10″ | 31.588 | 0.188 | 4.775 | 10.750 | 273 | 21.207 | |
| 3/4″ | 1.684 | 0.113 | 2.870 | 1.050 | 27 | 40 STD | 1.131 |
| 12″ | 37.570 | 0.188 | 4.775 | 12.750 | 324 | 25.222 | |
| 1″ | 2.501 | 0.133 | 3.378 | 1.315 | 33 | 40 STD | 1.679 |
| 20″ | 78.547 | 0.250 | 6.350 | 20.000 | 508 | 52.733 | |
| 1 1/4″ | 3.385 | 0.140 | 3.556 | 1.660 | 42 | 40 STD | 2.273 |
| 14″ | 41.308 | 0.188 | 4.775 | 14.000 | 356 | 27.732 | |
| 1 1/2″ | 4.048 | 0.145 | 3.683 | 1.900 | 48 | 40 STD | 2.718 |
| 42″ | 206.914 | 0.312 | 7.925 | 42.000 | 1067 | 138.911 | |
| 8″ | 25.233 | 0.188 | 4.775 | 8.625 | 219 | 16.940 | |
| 48″ | 284.112 | 0.375 | 9.525 | 48.000 | 1219 | STD | 190.738 |
| 36″ | 142.180 | 0.250 | 6.350 | 36.000 | 914 | 95.453 | |
Inconel 718 Hollow pipe pressure rating
Inconel 718 Hollow pipe pressure rating
| Size mm |
Maximum internal pressure, ksi | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 100°F | 400°F | 200°F | 600°F | 300°F | 700°F | 500°F | |||
| 10x1 | 534 | 524 | 534 | 505 | 529 | 494 | 516 | ||
| 16x1 | 324 | 318 | 324 | 307 | 321 | 300 | 313 | ||
| 6 x1 | 940 | 921 | 940 | 888 | 930 | 869 | 907 | ||
| 12x1 | 440 | 431 | 440 | 415 | 435 | 407 | 424 | ||
| 8x2 | 1476 | 1447 | 1476 | 1395 | 1462 | 1366 | 1425 | ||
Alloy 718 seamless pipe testing
- Ultrasonic
- Chemical
- Mechanical
- PMI
Chemical composition of NCF 718 round pipes
Chemical composition of NCF 718 round pipes
| Inconel | Ni | Mo | Cr | Mn | Fe | Co | Nb | Al | Cu | C | Ti | P | Si | B | S |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 718 | 50.0–55.0 | 2.8–3.3 | 17.0–21.0 | 0.35 | Balance | 1.0 | 4.75–5.5 | 0.65–1.15 | 0.2–0.8 | 0.08 | 0.3 | 0.015 | 0.35 | 0.006 | 0.015 |
718 Inconel exhaust pipes mechanical properties
718 Inconel exhaust pipes mechanical properties
| GRADE | Tensile Strength | Melting Point | Yield Strength (0.2%Offset) | Elongation |
|---|---|---|---|---|
| Inconel 718 | Psi 1,35,000 , MPa 930 | 1350 °C (2460 °F) | Psi 75,000 , MPa 482 | 45 % |
UNS N07718 square pipe equivalent grades
UNS N07718 square pipe equivalent grades
| Grade | Old British | UNS No | Euronorm | Japanese JIS | GOST | ||
|---|---|---|---|---|---|---|---|
| BS | En | No | AFNOR | ||||
| 718 | - | - | N07718 | 2.4668 | - | NCF 718 | - |
Inconel 718 pipe price list
Inconel 718 pipe price list
| Description | Price in USD | Price in Kilogram (INR) |
|---|---|---|
| Ams Uns N07718 Inconel 718 Pipe Handling, 4 inch, For Chemical | $ | ₹ 4,000 |
| Inconel 718 Pipes, 1 inch | $ | ₹ 2,150 |
DIN 2.4668 pipe physical properties
DIN 2.4668 pipe physical properties
| Modulus Elasticity | 200 | GPa |
| Electrical Resistivity | 1.32 | Ohm-cm |
| Specific Heat (0-100°C) | 435 | J.kg-1.°K-1 |
| Thermal Conductivity | 11.4 | W.m -1.°K-1 |
| Thermal Expansion | 13 | μm/μm/°C |
| Density | 8.19 | g/cm3 |
Temperature range of Alloy 718 cold drawn pipe
Temperature range of Alloy 718 cold drawn pipe
| Grade | Temperature Range |
|---|---|
| Inconel 718 | -423°F - 1,300°F or -253°C - 704°C |
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