
Inconel 718 Tube
1. Standard: ASTM B163, ASME SB163
2. Size: 1/2''~12'' OD
3 .Thickness: SCH5~SCHXXS
4. Equivalent: UNS N07718, WNR.2.4668, Inconel 718
Inconel 718 Tube is a nickel-chromium alloy with added niobium and molybdenum, which can be used at temperatures up to 700°C. 2.4668 Alloy 718 has excellent corrosion resistance, high strength and weldability. N07718 material also has good resistance to strain aging cracking and can be used in the annealed state, aged, and cold worked state. Inconel 718 seamless tube is widely used in aerospace, gas turbine and nuclear power applications.
- ASTM B163: Standard Specification for Seamless Nickel and Nickel Alloy Condenser and Heat-Exchanger Tubes
- Other Grades: Hastalloy C22, Hastalloy C276, Incoloy 800, Incoloy 800H, Incoloy 800HT, Incoloy 825, Monel K500, Inconel 600, Inconel 601, etc.
- Suppliers: We stock and produce Inconel 718 bar, plate, tube, pipe, flange, fittings, pipe spool, and sheet.

Inconel 718 Tube Chemical Composition (% by weight)
- Nickel (Ni): 50-55%
- Chromium (Cr): 17-21%
- Iron (Fe): Balance (remaining percentage)
- Molybdenum (Mo): 2.8-3.3%
- Niobium (Nb) + Tantalum (Ta): 4.75-5.5%
- Titanium (Ti): 0.65-1.15%
- Aluminum (Al): 0.2-0.8%
- Cobalt (Co): Maximum 1%
- Manganese (Mn): Maximum 0.35%
- Silicon (Si): Maximum 0.35%
- Copper (Cu): Maximum 0.3%
- Carbon (C): Maximum 0.08%
- Phosphorus (P): Maximum 0.015%
- Sulfur (S): Maximum 0.015%
- Boron (B): Maximum 0.006%
2.4668 Inconel 718 Mechanical Properties
| Temper | Solution-treated | |
| Tensile Rm | 155 | ksi (Max) |
| Tensile Rm | 1069 | MPa (Max) |
| R.p. 0.2% Yield | 95 | ksi (Max) |
| R.p. 0.2% Yield | 655 | MPa (Max) |
| Elongation (2" or 4D gl) | 30 | % (min) |
N07718 Material Physical Properties (Room Temperature)
| 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 |
| Modulus Elasticity | 200 | GPa |
| Electrical Resistivity | 1.32 | Ohm-cm |
| Density | 8.19 | g/cm3 |
Inconel Alloy 718 Applications:
- Manufacturing turbine blades and combustion chambers
- Aircraft engine components
- Rocket engines
- Spacecraft
- Gas turbines
- Turbine disks, shafts and compressor blades
Alloy 718 Hot Rolling Production Process:
- Raw material preparation
- Heating billet
- Rough rolling
- Intermediate rolling
- Finishing rolling
- Cooling
- Heat treatment
- Testing
- Packaging
ASTM B163 UNS N07718 Tube Tests
- Non-destructive testing
- Corrosion resistance test
- PMI test
- Hydraulic pressure test
- Ultrasonic
- Hydraulic pressure test
- Flattening test
- Eddy current
FAQ
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