Inconel 718 Pipe Fittings have the highest tensile and yield strength and are of the first choice in aerospace turbine sections, high-pressure gas processing systems and cryogenic service. Inconel 718 Pipe Fittings are made using a precipitation-hardened nickel-chromium alloy with the exceptional strength being gained by the presence of gamma-prime (γ') and gamma-double-prime (γ'') precipitates formed during the ageing heat treatment process. Alloy 718 fittings are more resistant to high stresses than the standard Inconel 600 and 625 fittings, and have excellent corrosion resistance up to 650 °C.
Amardeep Steel Centre produces and exports ASTM B366 UNS N07718 fittings both in solution-annealed and age-hardened condition, Inconel 718 buttweld fittings from SCH 10 to XXS, Inconel 718 socket weld fittings, Inconel 718 threaded fittings in 3000# to 9000# pressure classes. All shipments are guaranteed to be certified as per EN 10204 3.1 MTCs and as per AMS 5664 on request and are TPIed by accredited agencies.
ASTM B366 UNS N07718 Pipe Fittings Specifications
Parameter | Details |
Specification | ASTM B366 / ASME SB366 / AMS 5664 |
UNS No. | N07718 |
Werkstoff No. | 2.4668 |
Size Range (BW) | 1/2" NB to 24" NB |
Size Range (Forged) | 1/8" NB to 4" NB |
Schedules | SCH 10 to XXS |
Pressure Class (Forged) | 3000# / 6000# / 9000# |
End Finish | BE, PE, TE |
Form | Seamless & Welded; Solution Annealed / Aged |
Types of Inconel 718 Pipe Fittings
Fitting | Description | Standard |
Inconel 718 Elbow | 90 / 45 LR & SR; SMLS & welded | ASME B16.9 |
Inconel 718 Tee | Equal / reducing tees | ASME B16.9 |
Inconel 718 Reducer | Concentric / eccentric reducers | ASME B16.9 |
Inconel 718 Forged Fittings | Elbows, tees, crosses | ASME B16.11 |
Inconel 718 Socket Weld Fittings | 3000# / 6000# / 9000# SW fittings | ASME B16.11 |
Inconel 718 Threaded Fittings | NPT elbows, tees, nipples, unions | ASME B16.11 |
End Cap | Pipe closure fittings | ASME B16.9 |
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Source High-Strength Inconel 718 Fittings from India Submit BOM to info@amardeepsteel.com - Ex-Stock or Short Lead Time |
Inconel 718 Chemical Composition
Ni | Cr | Fe | Mo | Nb | Al | Ti |
50-55% | 17-21% | Balance | 2.8-3.3% | 4.75-5.5% | 0.2-0.8% | 0.65-1.15% |
Inconel 718 Mechanical Properties
UTS (MPa) | 0.2% YS (MPa) | Elongation (%) | Hardness (Rc) |
1241 min (aged) | 1034 min (aged) | 12 min | <=40 Rc |
Equivalent Grades of Inconel 718
UNS | W.Nr. | AMS | BS | Common Name |
N07718 | 2.4668 | AMS 5664 | HR 7 | Alloy 718 / Vac-Arc 718 |
Applications of Inconel 718 Pipe Fittings
- Aerospace gas turbines: combustion casings, turbine disk connections, afterburner ducting
- Oil & gas: high-pressure wellhead components, completion tools, safety valve bodies per NACE MR0175
- Rocket propulsion: cryogenic liquid oxygen and hydrogen fuel line fittings
- Nuclear power: fuel assembly spacer grids, control rod drive mechanism piping
- Automotive motorsport: turbocharger housings and high-boost pressure piping assemblies
Frequently Asked Questions
Q: What is the yield strength of Inconel 718 Pipe Fittings?
A: In the age-hardened condition, Inconel 718 pipe fittings achieve a minimum 0.2% yield strength of 1034 MPa (150 ksi), making it one of the highest-strength nickel alloy fittings available.
Q: What applications are Inconel 718 Pipe Fittings used in?
A: Inconel 718 fittings are used in aerospace gas turbines, oil & gas pressure vessels, cryogenic piping systems, nuclear reactors, and high-performance rocket engine components.
Q: Are Inconel 718 socket weld fittings available?
A: Yes. Amardeep Steel supplies Inconel 718 socket weld fittings per ASME B16.11 in 3000#, 6000#, and 9000# pressure classes, alongside standard buttweld and threaded configurations.
Q: Does Inconel 718 require heat treatment?
A: Inconel 718 is typically supplied in the solution-annealed condition. Age hardening (two-step precipitation heat treatment) is applied to achieve maximum strength per AMS 5664 requirements.
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