Inconel 601 Alloy vs Incoloy 800 Alloy
Inconel 601 Alloy vs Incoloy 800 Alloy
Both Inconel 601 and Incoloy 800 are high-temperature nickel-chromium alloys, but Inconel 601 (with a higher nickel content and added aluminum) exhibits superior high-temperature oxidation/carburization resistance and creep strength, making it an ideal material for manufacturing furnace components. Incoloy 800 (with a higher iron content, lower nickel content, and added aluminum) maintains excellent strength at temperatures up to 1500°F and is resistant to hot acid (such as nitric/sulfuric acid) corrosion, making it an economical choice for general heat-resistant/corrosion-resistant applications, although 601 performs better in extremely oxidizing environments.
What is Incoloy 800?
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Incoloy 800 is a nickel-iron-chromium austenitic alloy (typically including 800/800H/800HT) whose core characteristic is excellent resistance to creep, carburization, and high-temperature oxidation at temperatures up to approximately 815°C, while maintaining good strength and thermal stability. It is designed for critical components that require long-term exposure to high-temperature corrosive atmospheres and mechanical stress, such as high-temperature heat treatment furnaces, petrochemical cracking units, industrial heaters, and nuclear power plant steam generators. It is a classic high-performance engineering alloy for addressing high-temperature oxidation and thermal fatigue problems.
Inconel 601 is a nickel-chromium-iron alloy that achieves high-temperature strengthening and protection through the addition of aluminum. Its core characteristic is extremely excellent resistance to oxidation, carburization, and sulfidation at extreme temperatures up to approximately 1250°C, while maintaining excellent high-temperature strength and thermal stability. It is designed for environments requiring long-term exposure to high-temperature corrosive atmospheres, such as high-temperature heat treatment equipment, industrial furnace components, combustion systems, petrochemical cracking tubes, and aerospace hot-end components. It is especially suitable for harsh conditions involving alternating oxidation and reduction, and is a top-tier material for solving high-temperature oxidation and thermal fatigue problems.
Chemical composition of Inconel 601 and Incoloy 800
| Element | Inconel 601 Content (%) | Incoloy 800 Content (%) |
|---|---|---|
| Nickel | 58.0 - 63.0 | 30.0 - 35.0 |
| Chromium | 21.0 - 25.0 | 19.0 - 23.0 |
| Iron | ≤ 14.0 | ≥ 39.5 |
| Aluminum | 1.0 - 1.7 | 0.15 - 0.6 |
| Copper | ≤ 1.0 | ≤ 0.75 |
| Manganese | ≤ 1.5 | ≤ 1.5 |
| Carbon | ≤ 0.10 | ≤ 0.10 |
| Silicon | ≤ 0.5 | ≤ 1.0 |
| Sulfur | ≤ 0.015 | ≤ 0.015 |
| Titanium | - | 0.15 - 0.6 |
| Titanium + Carbon (Ti+C) | - | ≤ 0.03 (Carbon control) |
| Others (max) | - | ≤ 0.5 |
Physical properties of Inconel 601 and Incoloy 800
| Property | Inconel 601 | Incoloy 800 |
|---|---|---|
| Density, g/cm³ | 8.11 | 8.00 |
| Density, lb/in.³ | 0.293 | 0.289 |
| Melting Range, °C | 1360 - 1411 | 1350 - 1400 |
| Melting Range, °F | 2480 - 2572 | 2460 - 2550 |
| Specific Heat, J/kg·°C | 450 (at 20°C) | 500 (at 20°C) |
| Thermal Conductivity, W/m·°C | 11.2 (at 20°C) | 11.8 (at 20°C) |
| Thermal Expansion, μm/m·°C | 14.1 (20-1000°C) | 14.4 (20-1000°C) |
| Electrical Resistivity, μΩ·cm | 118 (at 20°C) | 98 (at 20°C) |
| Modulus of Elasticity, GPa | 206 | 196 |
| Magnetic Permeability | Typically <1.02 | Typically <1.05 |
Inconel 601 (UNS N06601)
Key Features: Excellent oxidation and carburization resistance at high temperatures due to the addition of aluminum (1-1.7%).
Best Applications: Industrial furnaces, heat treatment equipment, radiant tubes, burner nozzles, and high-temperature chemical processing.
Advantages: Excellent creep rupture strength, resistance to chloride stress corrosion cracking, and good performance under severe cyclic conditions.
Incoloy 800 (UNS N08800)
Key Features: Good strength, oxidation resistance, and carburization resistance at temperatures up to 1500°F (816°C).
Best Applications: Equipment exposed to hot acids (sulfuric acid, nitric acid), petrochemical processing, and general high-temperature applications.
Advantages: Excellent mechanical properties, resistance to various forms of corrosion, and cost-effective within its application range.
Applications of Inconel 601 vs Incoloy 800
| Industry/Sector | Inconel 601 Applications | Incoloy 800 Applications |
|---|---|---|
| Heat Treating | Furnace muffles, radiant tubes, retorts, baskets, trays | Radiant tubes, retorts, baskets, furnace muffles, roller hearths |
| Chemical Processing | Catalyst support grids, nitric acid production equipment, combustion systems | Heat exchangers, process piping, reaction vessels, heater tubes in corrosive environments |
| Petrochemical & Refining | Pyrolysis tubing, burner nozzles, thermocouple protection tubes | Heater tubes, reformer tubes, furnace components, waste heat recovery systems |
| Power Generation | Superheater tube supports, heat shields, combustion chamber liners in gas turbines | Steam superheater tubes, reheater tubes, boiler components, nuclear steam generator tubing |
| Aerospace | Combustion can liners, afterburner components, thermal barrier support structures | Jet engine exhaust components, afterburner parts, thrust reverser assemblies |
Summary of the main differences between Inconel 601 and Incoloy 800
Nickel content: Inconel 601 has a significantly higher nickel content (58-63%) than Incoloy 800 (which has a higher iron content).
Oxidation resistance: The aluminum content of Inconel 601 gives it superior performance in extremely high-temperature oxidation/carburization environments.
Acid resistance: Incoloy 800 is particularly suitable for high-temperature acidic environments, while Inconel 601 may not be the best choice in such environments.
Applications: Alloy 601 performs exceptionally well in furnace bodies/heat treatment components; alloy 800 is a versatile and high-performance material suitable for general high-temperature/corrosion-resistant applications.
Why Choose Gnee as Your Nickel-Based Alloy Supplier
✅ Over 18 years of export experience, products sold to more than 80 countries
✅ Certified by ISO, SGS, and BV
✅ Global inventory of Inconel, Hastelloy, Incoloy, and Monel alloy tubing, plates, and bars
✅ Custom processing services available – including cutting, polishing, CNC machining, and packaging
✅ Fast delivery within 7-15 days, supported by global logistics partners
📦 Packaging and Shipping
All stainless steel products are packaged using the following methods:
Wooden pallets or crates
Moisture-proof packaging
Labels with furnace number, standard, and size labels
Shipped worldwide by sea, air, or express
About Gnee Steel
Gnee Steel is a professional manufacturer of nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy 800, Incoloy 800H/HT, Incoloy 825, Monel 400, Monel K500, and other high-temperature alloy materials. We specialize in the production and sales of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, power generation, automotive, nuclear energy, and other fields, and we can provide customized alloy material solutions according to customer needs. For inquiries about alloy material prices or customized alloy material solutions, please feel free to contact us via email at ss@gneemetal.com for a quote.
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