Inconel 601 Flanges
Inconel 601 Flanges ( UNS N06601 ) Manufacturer & Supplier
Inconel 601 Flanges are manufactured from a high-performance nickel-chromium alloy renowned for its excellent resistance to heat, oxidation, and corrosion. Engineered to perform consistently in temperatures up to 1200°C, Alloy 601 is widely used in thermal processing, chemical industries, power generation, and heat-treating applications.
These flanges offer superior metallurgical stability, outstanding mechanical strength, and excellent resistance to carburization and oxidation. Their ability to maintain structural integrity under severe thermal cycling makes them a preferred choice for furnace components, petrochemical systems, and high-temperature atmospheres.
Key Features
Exceptional resistance to oxidation up to 1200°C
Excellent resistance to carburization and sulfidation
High mechanical strength and superior thermal stability
Good resistance to aqueous corrosion
Outstanding resistance to spalling in cyclic heating conditions
Excellent weldability and fabricability
Suitable for heating, cooling, and high-temperature industrial applications
Long service life in harsh environments
Specifications
| Specification | Details |
|---|---|
| Grade | Inconel 601 |
| UNS | N06601 |
| Werkstoff Nr. | 2.4851 |
| Standards | ASTM B564 / ASME SB564 |
| Flange Types | WNRF, SORF, BLRF, SWRF, Threaded, Lap Joint, Orifice, Long Weld Neck |
| Size Range | ½” to 48” |
| Pressure Class | 150#, 300#, 600#, 900#, 1500#, 2500# |
| Face Type | RF / RTJ / FF |
| Manufacturing Process | Forged / Plate / CNC Machined |
Equivalent Grades
| Standard | Grade |
|---|---|
| UNS | N06601 |
| WNR | 2.4851 |
| Trade Name | Inconel 601 / Alloy 601 |
Available Sizes
Flange Size: ½” to 48″
Pressure Rating: 150# – 2500#
Custom sizes available upon request
Chemical Composition
| Element | Percentage (%) |
|---|---|
| Nickel (Ni) | 58 – 63 |
| Chromium (Cr) | 21 – 25 |
| Iron (Fe) | Balance |
| Aluminum (Al) | 1 – 1.7 |
| Carbon (C) | 0.10 max |
| Silicon (Si) | 0.50 max |
| Manganese (Mn) | 1 max |
| Copper (Cu) | 1 max |
| Sulfur (S) | 0.015 max |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 620 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 | 1350–1400°C |
| Thermal Conductivity | 14.8 W/m·K |
| Specific Heat | 450 J/kg·K |
| Electrical Resistivity | 1.20 μΩ·m |
Types of Inconel 601 Flanges
Weld Neck Flanges (WNRF)
Slip-On Flanges (SORF)
Blind Flanges (BLRF)
Threaded Flanges
Socket Weld Flanges
Lap Joint Flanges
Long Weld Neck Flanges
Orifice Flanges
Spectacle Blind Flanges
Reducing Flanges
Corrosion Resistance
Excellent resistance to high-temperature oxidation
Strong resistance to carburization, sulfidation & scaling
Good resistance to aqueous corrosion
Excellent performance in steam, combustion gases, nitrogen, and carbonization atmospheres
Resists oxidation even in cyclic heating environments
Heat Resistance
Withstands continuous service up to 1200°C
Excellent creep and rupture strength at elevated temperatures
Superior resistance to spalling and thermal shock
Ideal for furnace components and heat treatment systems
Maintains structural stability during thermal cycling
Heat Treatment
Solution Annealing: 1010°C – 1095°C
Cooling: Air cool or water quench
Restores ductility after forming
Heat treatment enhances oxidation and corrosion resistance
Welding
Inconel 601 is highly weldable with standard welding processes:
Suitable Welding Methods
GTAW (TIG)
GMAW (MIG)
SMAW
PAW
Welding Notes
Recommended filler metal: Inconel 82 / ERNiCr-3
Clean welding area to avoid contamination
Preheat not required
Avoid excessive heat input
Post-weld heat treatment generally not needed
Fabrication
Excellent machinability with carbide tools
Good formability for hot and cold working
Recommended hot-working temperature: 1200°C – 900°C
Anneal after heavy cold forming
Easily fabricated into complex flange geometries
Applications
Heat treatment furnaces & muffles
Petrochemical processing units
Power generation and turbine components
Steam superheater tubes
Chemical processing & reactors
Thermal oxidizers
Kiln and furnace heating systems
Exhaust systems & incinerators
Aerospace high-temperature structures