Inconel 601 Pipe Fittings
Inconel 601 Pipe Fittings ( UNS N06601 )
Inconel 601 Pipe Fittings are engineered using a nickel-chromium alloy known for exceptional resistance to high-temperature oxidation and carburization. These fittings maintain outstanding mechanical strength even at elevated temperatures, making them suitable for heat-intensive and corrosive industrial conditions. With excellent metallurgical stability, superior oxidation resistance up to 1250°C, and the ability to withstand cyclic thermal conditions, Inconel 601 Pipe Fittings are widely used in chemical processing, thermal power plants, petrochemicals, and furnace engineering.
Key Features
Excellent High-Temperature Strength – Performs reliably in temperatures up to 1250°C.
Superior Oxidation Resistance – Forms a strongly adherent oxide layer that resists spalling.
Good Carburization & Sulfidation Resistance – Suitable for furnace and thermal processing environments.
High Mechanical Stability – Maintains strength and structural integrity under severe thermal cycling.
Good Workability & Weldability – Welded using standard techniques without cracking.
Resistant to Aqueous Corrosion – Protects against mild acids, alkalis, and atmospheric conditions.
Specification
| Specification | Details |
|---|---|
| Material | Inconel Alloy 601 |
| Standard | ASTM B366, ASME SB366 |
| UNS Number | UNS N06601 |
| Form | Elbows, Tees, Reducers, Caps, Stub Ends, Cross, Bends |
| Manufacturing Type | Seamless / Welded / Fabricated |
| Size Range | ½” to 24” |
| Wall Thickness | SCH 5S – SCH XXS |
| Dimensions | ASME B16.9 / B16.28 / MSS-SP-43 |
| Type | Buttweld / Socket Weld / Threaded |
Equivalent Grades
| Standard | Grade |
|---|---|
| UNS | N06601 |
| Werkstoff Nr. | 2.4851 |
| AFNOR | NC23FeA |
| BS | NA 49 |
| EN | NiCr23Fe |
Available Sizes
Buttweld Fittings: ½” – 24”
Socket Weld Fittings: ⅛” – 4”
Threaded Fittings: ⅛” – 4”
Custom sizes available upon request
Chemical Composition
| Element | % |
|---|---|
| Nickel (Ni) | 58.0 – 63.0 |
| Chromium (Cr) | 21.0 – 25.0 |
| Iron (Fe) | Balance |
| Aluminum (Al) | 1.0 – 1.7 |
| Carbon (C) | 0.10 max |
| Manganese (Mn) | 1.0 max |
| Silicon (Si) | 0.50 max |
| Sulfur (S) | 0.015 max |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 650 MPa (min) |
| Yield Strength (0.2% Offset) | 275 MPa (min) |
| Elongation | 30% (min) |
| Hardness | 85 HRB (max) |
Physical Properties
| Property | Value |
|---|---|
| Density | 8.11 g/cm³ |
| Melting Range | 1360–1411°C |
| Electrical Resistivity | 1.32 μΩ·m |
| Thermal Conductivity | 14.8 W/m·K |
| Specific Heat | 444 J/kg·K |
Types of Inconel 601 Pipe Fittings
Buttweld Fittings
Elbow (45°, 90°, 180°)
Tee & Reducing Tee
Reducers (Concentric & Eccentric)
Stub Ends (Short / Long)
Caps
Cross
Socket Weld Fittings
Elbows, Tees, Cross, Couplings
Threaded Fittings (NPT/BSP)
Elbows, Tees, Bushings, Plugs, Caps
Corrosion Resistance
Inconel 601 offers exceptional corrosion resistance due to its high chromium content and protective oxide film. It resists:
High-temperature oxidation up to 1250°C
Sulfidation and carburization
Chloride stress-corrosion cracking
Nitric, phosphoric, and weak organic acids
High-temperature steam
This makes it ideal for severe chemical and thermal environments.
Heat Resistance
Provides outstanding resistance against high-temperature oxidation.
Superior metallurgical stability prevents scaling and surface deterioration.
Performs efficiently in cyclic heating/cooling operations.
Suitable for furnace components, heat exchangers, burners, and annealing equipment.
Heat Treatment
Annealing Temperature: 1010°C – 1140°C
Cooling Method: Rapid air cooling or water quenching
Heat treatment enhances ductility and stress-relieving properties.
Welding
Inconel 601 offers excellent weldability using:
GTAW (TIG)
GMAW (MIG)
SMAW (Stick)
FCAW
Recommended filler metals: Inconel 82 / 601 Weld Wire
No preheat required; post-weld treatment generally not necessary.
Fabrication
Good formability and machinability
Suitable for forging, bending, cutting, and hot working
Hot working temperature: 1200°C – 900°C
Cold working increases strength and hardness
Applications
Petrochemicals & Chemical Processing
Furnace Components & Burners
Thermal Oxidizers
Aerospace & Heat Treatment Equipment
Steam Generation Plants
Power Plant Ducting & Exhaust Systems
Annealing and Sintering Trays
Industrial Heating Systems