Inconel Pipe Fittings
Stellanox Steel offers high-performance Inconel Pipe Fittings engineered to withstand extreme heat, pressure, and corrosive environments. Made from high-grade nickel-chromium alloys like Inconel 600, 625, 718, and X-750, these fittings provide leak-proof, high-strength, and corrosion-resistant solutions for critical piping systems in aerospace, petrochemical, nuclear, marine, and chemical industries.
Our range includes butt weld, socket weld, threaded, and flanged fittings—manufactured to meet international standards including ASME B16.9, B16.11, MSS SP-43, and ASTM B366.
What are Inconel Pipe Fittings?
Inconel Pipe Fittings are connectors used to join, redirect, or terminate piping systems where exposure to high temperatures, oxidizing media, and acidic environments is unavoidable. Inconel alloys maintain mechanical integrity under thermal stress and resist crevice corrosion, chloride attack, and acidic breakdown, making them essential for high-performance process piping.
These fittings are widely used in systems carrying sulfuric acid, nitric acid, seawater, and high-temperature steam.
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Stainless Steel |
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Carbon Steel |
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Duplex Stainless Steel |
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Super Duplex Stainless Steel |
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Alloy Steel |
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Titanium |
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Hastelloy |
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Inconel |
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Monel |
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Aluminium |
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Copper |
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Pure Nickel |
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Flanges |
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Forged Fittings |
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Valves |
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Fasteners |
Key Features
Exceptional Corrosion & Oxidation Resistance
High Strength at Elevated Temperatures
Resistant to Pitting, Cracking, and Thermal Cycling
Compatible with High-Pressure and High-Vibration Systems
Available in Butt Weld, Socket Weld, Threaded & Flanged Types
Certified to ASTM, ASME, DIN, EN, and NACE Standards
Grades
- Inconel 600 / 601 Pipe Fittings
- Inconel 625 / 718 Pipe Fittings
- Inconel 800 / 825 Pipe Fittings
- Inconel X-750 Pipe Fittings
Specification
| Property | Details |
|---|---|
| Product | Inconel Pipe Fittings |
| Available Grades | 600, 601, 625, 718, 800, 825, X-750 |
| Standards | ASTM B366, ASME B16.9/B16.11, MSS SP-43 |
| Types Available | Elbows, Tees, Reducers, Caps, Crosses, Stub Ends, Unions, Couplings |
| Size Range | ½" NB to 24" NB |
| Schedule/Wall Thickness | SCH 10 to SCH XXS |
| End Connections | Butt Weld, Socket Weld, Threaded (NPT/BSP), Flanged |
| Heat Treatment | Solution Annealed, Pickled |
| Testing & Certification | EN 10204 3.1/3.2, PMI, UT, Hydrostatic, IGC, NACE MR0175 |
Chemical Composition
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | ≥ 58.0 |
| Chromium (Cr) | 20.0 – 23.0 |
| Molybdenum (Mo) | 8.0 – 10.0 |
| Niobium (Nb) | 3.15 – 4.15 |
| Iron (Fe) | ≤ 5.0 |
| Carbon (C) | ≤ 0.10 |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 827 MPa |
| Yield Strength | ≥ 414 MPa |
| Elongation | ≥ 30% |
| Hardness | ≤ 220 HB |
| Density | 8.44 g/cm³ |
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ASTM | B366 |
| UNS | N06600, N06625 |
| DIN / EN | 2.4816, 2.4856 |
| ISO | NiCr15Fe, NiCr22Mo9Nb |
Weight
| Fitting Type | Size (inches) | Approx. Weight (kg) | Common Application |
|---|---|---|---|
| 90° Elbow LR | 1" | 0.27 | Changes flow direction in high-temp pipelines |
| 90° Elbow LR | 2" | 0.60 | Used in corrosive gas or steam systems |
| Equal Tee | 2" | 0.80 | Branch connection in chemical or exhaust systems |
| Equal Cross | 2" | 1.15 | Connects four pipe runs in superalloy assemblies |
| Concentric Reducer | 3" × 2" | 1.55 | Reduces pipe diameter in high-pressure pipelines |
| End Cap | 2" | 0.38 | Seals off pipe ends under extreme conditions |
| Stub End | 3" | 1.05 | Used with lap joint flanges for high-alloy piping |
| Threaded Coupling | 1" | 0.43 | Connects male threaded pipe ends securely |
| Threaded Coupling | 2" | 0.90 | Ideal for oil & gas or marine threaded systems |
| Union (Threaded/SW) | 1" | 0.66 | Quick-disconnect joint for maintenance-heavy lines |
| Union (Threaded/SW) | 2" | 1.35 | Allows pipe separation without cutting or welding |
Applications
Aerospace & Defense: Jet fuel lines, turbine fluid connections, heat ducts
Chemical Processing Plants: Acid injection lines, high-temperature valves
Marine & Offshore Systems: Ballast systems, high-salinity pipelines
Power & Nuclear Plants: Steam distribution, reactor piping
Pharmaceutical & Biotech: High-purity and corrosive fluid transport
Oil & Gas Industry: Downhole control lines, subsea manifolds
Benefits
Reliable Performance in Harsh Chemical and Thermal Conditions
Long-Term Resistance to Stress Cracking and Fatigue
Weldable, Formable, and Easy to Assemble
Low Maintenance + Extended Lifecycle = Cost Efficiency
Globally Certified for Critical Infrastructure Use
2025 Stellanox Steel |