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Inconel UNS N06601 (EN 2.4851) seamless tube is a nickel-chromium alloy designed for outstanding resistance to high-temperature oxidation and carburization, combined with excellent mechanical properties in cyclic thermal environments. Composed of 60% nickel, 23-25% chromium, 1.0-1.7% silicon, and minor additions of iron and aluminum, it conforms to standards like ASTM B168, ASME SB-168, and EN 10216-5. The seamless construction ensures uniform wall thickness and a defect-free surface, critical for maintaining integrity in harsh high-temperature applications.
N06601’s unique microstructure forms a dense Cr2O3 scale that adheres tightly to the matrix, preventing oxide spalling and protecting against gas-phase corrosion even at extreme temperatures.
Grade | Ni | Cu | Fe | Mn | C | Si | S | Cr | Al |
UNS N06601 | 58.0-63.0 | ≤1.0 | Remainder1 | ≤1.50 | ≤0.1 | ≤0.5 | ≤0.015 | 21-25 | 1.0-1.7 |
Superior High-Temperature Oxidation Resistance: Withstands continuous service at 1200°C and intermittent use up to 1350°C, resisting scale formation in air, nitrogen, and carbon dioxide atmospheres better than most stainless steels.
Resistance to Carburization & Nitridation: The high chromium and aluminum content creates a barrier against intergranular penetration by carbon and nitrogen, making it ideal for heat treatment furnaces.
Good Mechanical Strength: Maintains creep rupture strength up to 1093°C and exhibits excellent fatigue resistance in thermal cycling conditions, such as those found in industrial furnaces.
Moderate Corrosion Resistance: Resistant to nitric acid, organic acids, and molten salts, though it is not optimized for highly reducing or chloride-rich environments (use Inconel 625 or Hastelloy C-22 instead).
Grade | Tensile Strength ksi(Mpa) | Yield Strength ksi(Mpa) | Elongation(%) |
N06601 TUBE | ≥80(552) | ≥30(207) | ≥30 |
N06601 PIPE | ≥550 | ≥205 | ≥30 |
Heat Treatment Equipment: Used in furnace rollers, retorts, and radiant tubes for carburizing furnaces, sintering ovens, and heat treaters operating at 900-1200°C.
Petrochemical Heating Systems: Employed in ethylene furnace coils, reformer tubes, and thermal cracking units, resisting coking and scale buildup in high-temperature hydrocarbon streams.
Power Generation: Suitable for gas turbine exhaust systems and waste-to-energy incinerator tubes, enduring corrosive flue gases and thermal fatigue.
Ceramic & Glass Industries: Used in kiln supports, glass melting electrodes, and heat shields, resisting alkali vapor corrosion and thermal shock.
End of Pipe and Tube
Ply Wooden Boxes
PE Fabric Bundles
Standard seaworthy export packing
Plastic Bags, or as required
Marking
Supplier / Manufacturer Name or Custom Logo - on request
Specification
Material Grade
Nominal Size
Schedule or Wall Thickness
Method of Manufacturing (Seamless or Welded)
Heat Number
Marked Pipe Sample: XTD ASTM B167 UNS N06601 SEAMLESS 42.2x 3.56*6000MM HEAT NO. 2023121205A15
Packing
Ply Wooden Boxes
PE Fabric Bundles
Standard seaworthy export packing
Plastic Bags, or as required
Delivery Condition
Pickled&Annealed, Polished, Bright Annealed.
All tubes shall be supplied as per applicable ASTM B163 /B426
Mill test certificates will be issued
We can provide 3.2 Certification according to the needs of you
Standard
ASTM B165: Standard Specification for Nickel-Chromium-Iron Alloys UNS N06600, N06601, N06603,N06690, N06693, N06025, N06045, and N06696 UNS N06617 and Nickel-Iron-Chromium-Tungsten Alloy UNS N06674 Seamless Pipe and Tube
ASTM B167: Standard Specification for General Requirements for Nickel and Nickel Alloys Seamless Pipe and Tube
Q: How does N06601 compare to Inconel 600?
A:N06601 has higher chromium (23-25% vs. 14-17% in 600) and added silicon, providing superior oxidation and carburization resistance at elevated temperatures, while 600 excels in caustic and chloride environments.
Q: Can N06601 be used in molten aluminum?
A:No, molten aluminum reacts with nickel-based alloys. Use specialized aluminum-resistant alloys like Inconel 671 or pure nickel for such applications.
Q: What welding practices are recommended for N06601?
A:GTAW with ERNiCr-3 filler metal is preferred, with low heat input and interpass temperatures below 150°C to prevent grain coarsening and maintain scale resistance.
Q: Does N06601 require preheating before forming?
A:Hot forming is recommended above 900°C to improve ductility, while cold forming is possible for simple geometries, though annealing may be needed to restore ductility after heavy deformation.