Inconel 718 Fittings For Pipes & Tubes |Solitaire Overseas

Internationally, Solitaire Overseas is known for its pipework components used to make and export high-performance Inconel 718 fittings that meet strict requirements for important uses. Our fittings are made to meet the exact requirements of ASTM B366 and ASME SB366. The way they are built is meant to withstand heat, strong mechanical stress, and environments that rust. We promise that every fitting goes through strict quality checks, from the raw materials to the final delivery. These checks include dimensional accuracy tests and full traceability. Our building is certified by ISO 9001:2015. We can quickly and easily send packages to more than 45 countries thanks to our strong global logistics system.

We help industries like oil and gas, marine, aerospace, power generation, and more. If you want solutions that are made just for you or solutions that come in standard sizes, Solitaire Overseas can provide unmatched dependability, technical accuracy, and compliance with performance standards around the world.

What Are Inconel 718 Fittings?

Inconel 718 fittings are used to connect or reroute pipe systems that are under a lot of stress. The mechanical and thermal parts of these things are made to meet industrial standards. These fittings are made from a nickel-based alloy that is mostly made up of nickel, chromium, and iron. Niobium and molybdenum have been added to make them stronger. Inconel 718 is one of a kind because it is very strong, doesn't rust, and doesn't easily creep or wear down. All of these traits work pretty well in places with a lot of stress and heat.

These parts meet ASTM B366 Inconel 718 Fittings standards and are widely used in fields like aerospace, nuclear, and power generation where mechanical integrity and temperature stability are very important. Even though Inconel 600 fittings and Inconel 601 fittings are better at resisting oxidation and carburization than others, Inconel 718 fittings are better at balancing how long they last and how stable they are at high temperatures. As everyone knows, Inconel 625 fittings don't rust very easily.

Product Range & Types Offered

Solite Overseas offers a strong and well-thought-out selection of Inconel fittings to meet the needs of different industries that work in tough conditions. Each type of fitting is made to last and keep its mechanical integrity in tough situations. They are all designed to fit together smoothly in systems with high pressure and temperature. Our range of products comes in both standard and custom sizes and meets the requirements of ASTM B366.

Inconel 718 Fittings

Elbow (90°, 45°, Long Radius, Short Radius)

Designed to alter the direction of flow, these elbows come in multiple radius and angle configurations, offering flexibility in layout while maintaining structural strength and corrosion resistance.

Tee (Equal Tee, Reducing Tee)

Ideal for splitting or combining flow within piping systems, our tees offer stable performance under thermal stress and are available in both equal and reducing types to suit varied pipeline designs.

Reducer (Concentric, Eccentric)

These fittings help transition between different pipe sizes without disrupting the flow. Concentric reducers maintain alignment, while eccentric types help avoid air accumulation in horizontal lines.

Coupling (Full, Half)

Used to securely join two sections of pipe, our full and half couplings are crafted to deliver excellent sealing, weldability, and pressure-handling capabilities in high-demand applications.

Stub End (Short/Long)

Stub ends are primarily used with lap joint flanges and are available in both short and long versions, offering convenience in systems that require frequent dismantling and maintenance.

Union, Cross, Nipple

These smaller components serve key functions in high-precision assemblies, allowing directional changes, branching, and secure pipe extensions while maintaining leak-proof performance.

Custom Fabricated Fittings

Solitaire Overseas also delivers fully customized Inconel 718 fittings tailored to your project requirements. Whether it’s non-standard geometries, tight tolerances, or special end connections, we offer engineered solutions built to spec, complete with full documentation and material traceability.

Technical Specifications

All of Solitaire Overseas' ASTM B366 Inconel 718 fittings are easy to put in pipe systems all over the world because they all match a wide range of pressure and dimension codes. The way they make things follows the rules in ASME SB366. In this way, they meet the highest standards for performance, accuracy, and durability in the industry.

The sizes of our Inconel 718 (UNS N07718 / Werkstopp Nr. 2.4656) fittings are based on ASME B16.9 for buttweld fittings, ASME B16.9 for molded fittings, and MSS SP-79/83/95/97 for socket-weld/threaded designs. This range has a lot of ANSI Class 150 to Class 2500 fittings with widths from half an inch to 48 inches. In a lot of different fields, like aerospace, power generation, oil and gas, and marine engineering, they are used in situations with a lot of mechanical stress, changing temperatures, and chemical exposure.

This list is quick and easy to use for all UNS, Werkstoff, and Inconel grades:

Grade	UNS Number	Werkstoff Number
Inconel 600	N06600	2.4816
Inconel 601	N06601	2.4851
Inconel 625	N06625	2.4856
Inconel 718	N07718	2.4668
Inconel 825	N08825	2.4858

Each fitting is available with full traceability, mill test certification, and optional third-party inspection for enhanced compliance assurance.

Chemical Composition

The superior performance of Inconel alloys lies in their carefully balanced chemical makeup. The ASTM B366 composition for fittings ensures uniformity in mechanical strength, corrosion resistance, and weldability across grades. Specifically, Inconel 718, a nickel-chromium-molybdenum alloy enhanced with niobium, aluminum, and titanium, offers exceptional resistance to high-temperature fatigue and stress corrosion cracking.

Below is the nominal Inconel 718 chemical composition compared to other common grades, as per ASTM B366 standards:

Grade	C	Mn	Si	S	P	Fe	Ni	Cr	Mo	Nb+Ta	Al	Ti
Inconel 600	≤0.15	≤1.0	≤0.5	≤0.015	≤0.015	6–10	≥72.0	14–17	—	—	—	—
Inconel 601	≤0.10	≤1.0	≤0.5	≤0.015	≤0.020	Balance	58–63	21–25	—	—	1.0–1.7	0.25–1.0
Inconel 625	≤0.10	≤0.50	≤0.50	≤0.015	≤0.015	≤5.0	≥58.0	20–23	8–10	3.15–4.15	—	—
Inconel 718	≤0.08	≤0.35	≤0.35	≤0.015	≤0.015	Balance	50–55	17–21	2.8–3.3	4.75–5.5	0.2–0.8	0.65–1.15
Inconel 825	≤0.05	≤1.0	≤0.5	≤0.03	≤0.03	22.0 max	38–46	19.5–23.5	2.5–3.5	—	—	—

This precise chemical formulation enables Inconel 718 to deliver unmatched strength and stability across a wide range of high-performance environments, particularly where long-term resistance to heat, oxidation, and deformation is critical.

Mechanical Properties

Inconel 718 is widely recognized for its outstanding mechanical strength and structural reliability in extreme service conditions. The alloy’s unique chemistry, combined with precise processing, results in high-performance alloy fittings that deliver exceptional durability under high-pressure and high-temperature stress.

The following are the typical ASTM B366 mechanical properties for Inconel 718 fittings. These values represent the minimum requirements; actual performance may vary based on specific heat treatment and fabrication methods.

Property	Inconel 718 Value
Density	8.19 g/cm³
Melting Point	1260–1336 °C
Tensile Strength	≥1375 MPa (200 ksi)
Yield Strength (0.2%)	≥1100 MPa (160 ksi)
Elongation	≥12%
Hardness	Rockwell C 35–45

Thanks to its exceptional yield strength, Inconel 718 is extensively used in high-stress, high-fatigue environments such as turbine components, aircraft engines, and nuclear applications. Its reliable performance across a broad temperature range makes it one of the most trusted materials in the high-performance alloy fittings category.

Certifications & Compliance

At Solitaire Overseas, quality control isn't an afterthought; it's built into every step of the production process. Our Inconel 718 fittings are made to meet internationally recognized standards and go through rigorous testing to make sure they meet all sector-specific requirements. No matter if you work in nuclear, offshore drilling, aerospace, or any other field, our certifications guarantee dependability, safety, and international acceptance.

We proudly maintain the following certifications and compliances:

ISO 9001:2015 Certified Manufacturer – Ensuring consistent product quality and process control
ASTM B366 / ASME SB366 Compliance – Meeting all dimensional and material requirements for Inconel alloy fittings
NACE MR0175 Compatibility – Suitable for sour gas service and H₂S environments
Mill Test Certificates (EN 10204 3.1 / 3.2) – Full traceability and documentation for every batch
Third-Party Inspection Available – TUV, DNV, Lloyd’s Register, BV, or as per buyer request

This commitment to quality and compliance allows us to confidently serve clients across 45+ countries and critical industries worldwide.

Key Features & Performance Benefits

The Inconel 718 fittings are made for tough situations where the materials are put to the test. Few alloys are as strong, stable at high temperatures, and resistant to corrosion as these. This is because of their make-up and heat-treated structure. The outcome is a very good answer in fields where failure is not an option.

Key performance advantages include:

Excellent fatigue and stress rupture strength – Withstands cyclic loading and high-pressure conditions without compromising structural integrity.
High creep resistance up to 700 °C (1290 °F) – Maintains dimensional stability and load-bearing capacity in long-term high-temperature service.
Corrosion-resistant in oxidizing and reducing environments – Performs reliably in harsh chemical exposures, including acids and corrosive gases.
Non-magnetic with good weldability and formability – Ideal for fabrication, assembly, and use in sensitive electronic or magnetic applications.
Stable mechanical properties under prolonged exposure – Retains strength and performance over extended operating cycles and thermal shocks.
Reliable performance in aerospace and turbine systems – Preferred in mission-critical applications where temperature extremes and mechanical stress coexist.

These properties make Inconel 718 fittings a top choice for sectors like aerospace, energy, petrochemical, and offshore engineering.

Industries Served

The exceptional strength, corrosion resistance, and thermal stability of Inconel 718 fittings make them indispensable across a wide range of industries where safety, performance, and reliability are critical. Trusted by engineers and procurement professionals worldwide, these fittings are specifically designed to handle extreme conditions and aggressive service environments.

Oil & Gas: Deployed in subsea manifolds, wellhead assemblies, and sour gas processing systems where exposure to high pressure, hydrogen sulfide (H₂S), and seawater demands uncompromised durability.
Chemical & Petrochemical: Performs exceptionally in fluid systems subjected to thermal cycling, acidic chemicals, and oxidizing environments, maintaining integrity where other materials may fail.
Power Generation: Utilized in high-temperature zones such as steam generators, superheater tubes, and HRSG units, thanks to the alloy’s outstanding creep resistance and mechanical stability.
Aerospace & Defense: A preferred material for jet engine parts, combustion chambers, turbine blades, and structural ducting—areas where resistance to fatigue and extreme heat is vital.
Marine & Shipbuilding: Withstands high-pressure saltwater conditions and resists pitting, crevice corrosion, and stress cracking in offshore platforms and naval systems.
Nuclear & Energy: Essential in radiation-exposed systems such as piping, fasteners, and valve components that require long-term resistance to heat, oxidation, and material degradation.

Each of these sectors relies on the proven capabilities of Inconel 718 to deliver consistent performance under some of the harshest operating conditions in the world.

Packaging & Delivery

At Solitaire Overseas, every Inconel 718 fitting is packaged and shipped with utmost care to ensure safety, traceability, and compliance with international standards. We use export-compliant wooden crates with plastic end caps, shrink wrapping, and tagging for optimal protection during transit. Each fitting is clearly marked with its heat number, size, material grade, and applicable standard codes to maintain full identification throughout the supply chain. Whether your delivery terms are FOB, CIF, DDP, or CFR, we offer flexible global shipping options customized to your destination. Along with the shipment, clients receive a complete set of documentation including the commercial invoice, packing list, EN 10204 3.1/3.2 Mill Test Certificate, certificate of origin, and any required hydrotest or PMI reports, ensuring a smooth and fully certified procurement process.

Why Choose Solitaire Overseas for Inconel 718 Fittings?

If you choose Solitaire Overseas for your Inconel 718 fittings, you will be working with a company that combines technical know-how, in-house production, and dependability around the world. We can keep a close eye on the accuracy and consistency of our products because we have modern CNC machining, forging, and quality control facilities all under one roof. The ISO 9001:2015 and NACE MR0175 certifications help us do our work and make sure that materials can be tracked and that we follow international quality standards. Because we keep a lot of Inconel 718 fittings up to 48′ in stock, we can usually turn around standard items quickly (10–15 days). These times are for custom builds and take 20 to 30 days. Clients benefit from flexible pricing that works for both small and large purchases, as well as support 24 hours a day, 7 days a week from experienced metallurgists and application engineers.

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FAQs Inconel 718 Fittings

What are Inconel 718 fittings used for?

Inconel 718 fittings are used in high-stress, high-temperature environments like aerospace turbines, nuclear reactors, steam generators, and offshore equipment due to their exceptional strength, creep resistance, and corrosion protection under extreme conditions.

What makes Inconel 718 different from Inconel 625?

While both are nickel-based alloys, Inconel 718 offers higher tensile and yield strength due to precipitation hardening, making it ideal for high-stress applications. Inconel 625, on the other hand, provides superior corrosion resistance in more aggressive chemical environments.

What pressure ratings are available for Inconel 718 fittings?

Inconel 718 fittings are available in pressure classes ranging from ANSI Class 150 up to Class 2500, depending on size and design. These ratings make them suitable for extreme-pressure systems found in power plants, refineries, and aerospace assemblies.

Can I request a third-party inspection for Inconel 718 fittings?

Yes, third-party inspection services such as TUV, DNV, Lloyd’s, and BV can be arranged upon request. We ensure full compliance with client-specific requirements through certified testing, inspection reports, and buyer-authorized quality checks.

Do fittings come with traceability and MTC?

Absolutely. All Inconel 718 fittings come with complete heat number traceability and Mill Test Certificates (EN 10204 3.1/3.2). Additional documents like hydrotest, PMI, and hardness test reports are available to meet your project’s compliance needs.