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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.
