Comparison of Incoloy 800H and Inconel 601 materials
Comparison of Incoloy 800H and Inconel 601 materials
Both Incoloy 800H and Inconel 601 are high-temperature nickel alloys, but Inconel 601 has significantly higher nickel (>60%) and aluminum content, giving it superior high-temperature strength and excellent oxidation resistance, making it ideal for extreme high-temperature environments. Incoloy 800H, on the other hand, has a lower nickel content (approximately 40%) and a higher iron content. It is designed to enhance creep resistance and carburization resistance, making it highly suitable for chemical processing equipment, heat exchangers, and furnace components that require sustained stress at high temperatures. The main difference lies in their composition and primary performance characteristics: Inconel 601 focuses on high-temperature resistance, while Incoloy 800H focuses on creep strength.
Does Inconel 601 have good machinability?
A prominent feature of INCONEL alloy 601 is its excellent resistance to high-temperature oxidation. This alloy also possesses good resistance to aqueous corrosion, high mechanical strength, and is easy to form, machine, and weld.
Inconel 601 is a nickel-chromium-iron alloy strengthened and protected at high temperatures by the addition of aluminum. Its core characteristic is its exceptionally excellent resistance to oxidation, carburization, and sulfidation at extreme temperatures up to approximately 1250°C, while maintaining superior high-temperature strength and thermal stability. It is designed for applications 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 particularly suitable for harsh operating conditions involving alternating oxidation and reduction, making it a top-tier material for solving high-temperature oxidation and thermal fatigue problems.
Incoloy 800H is a high-carbon stabilized version of the Incoloy 800 series. Its core characteristic is that, through a higher carbon content (0.05-0.10%) and specific solution heat treatment, it provides excellent creep resistance, carburization resistance, and high-temperature oxidation resistance at temperatures up to approximately 815°C, while maintaining superior high-temperature strength and structural stability. It is designed for extreme environments requiring long-term resistance to high temperature, high pressure, and thermal cycling, such as petrochemical cracking furnace tubes, high-temperature heat exchangers, industrial heaters, and nuclear power plant steam generators, making it a key material for high-temperature pressure-bearing and thermal fatigue applications.
Chemical Composition of Inconel 601 vs Incoloy 800H Alloy
| Element | Inconel 601 Content (%) | Incoloy 800H 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 - 0.60 |
| Titanium | - | 0.15 - 0.60 |
| Carbon | ≤ 0.10 | 0.05 - 0.10 |
| Manganese | ≤ 1.5 | ≤ 1.5 |
| Silicon | ≤ 0.5 | ≤ 1.0 |
| Copper | ≤ 1.0 | ≤ 0.75 |
| Sulfur | ≤ 0.015 | ≤ 0.015 |
Incoloy 800H
Composition: Nickel-iron-chromium alloy with a high iron content.
Inconel 601
Composition: High nickel (>60%) and chromium alloy, with added aluminum to improve oxidation resistance.
Mechanical Properties of Inconel 601 vs Incoloy 800H
| Property | Inconel 601 (Typical) | Incoloy 800H (Typical) |
|---|---|---|
| Tensile Strength, Ultimate | 655 MPa (95 ksi) | 586 MPa (85 ksi) |
| Tensile Strength, Yield (0.2% Offset) | 310 MPa (45 ksi) | 241 MPa (35 ksi) |
| Elongation at Break | 45% (in 50 mm) | 40% (in 50 mm) |
| Reduction of Area | 45% | 50% |
| Hardness, Rockwell B | 85 HRB | 75 HRB |
| Hardness, Brinell | 180 HB | 160 HB |
Incoloy 800H
Main advantages: High carbon content improves creep strength, and it possesses good resistance to carburization and stress corrosion cracking.
Inconel 601
Main advantages: Excellent high-temperature mechanical strength, superior oxidation resistance, and good sulfidation resistance.
Applications of Inconel 601 vs Incoloy 800H
| Industry/Sector | Inconel 601 Applications | Incoloy 800H Applications |
|---|---|---|
| Heat Treating & Furnaces | Radiant tubes, furnace muffles, retorts, baskets, trays, annealing covers, thermocouple sheaths | Radiant tubes, retorts, furnace muffles, baskets, rollers, heat treatment fixtures, annealing covers |
| Chemical Processing | Catalyst support grids, nitric acid reactors, combustion systems, reactor internals, heat exchangers | Heat exchangers, process piping, reaction vessels, heater tubes, nitric acid equipment, evaporators |
| Petrochemical & Refining | Pyrolysis tubes, burner nozzles, flare tips, reformer components, thermowells | Steam methane reformer tubes, ethylene cracking coils, heater tubes, transfer lines, furnace parts |
| Power Generation | Superheater tube supports, heat shields, combustion liners (gas turbines), boiler internals | Superheater tubes, reheater tubes, boiler components, heat recovery steam generator (HRSG) parts |
| Aerospace | Combustion can liners, afterburner components, thermal barrier supports, exhaust system parts | Jet engine exhaust components, afterburner liners, thrust reversers, high-temperature fasteners |
Incoloy 800H
Best uses: Furnace components, heat exchangers, petrochemical processing, and applications requiring sustained high stress and high strength.
Inconel 601
Best uses: Aerospace, chemical processing, and extreme high-temperature environments requiring exceptional resistance to high-temperature oxidation and corrosion.
Main differences between Inconel 601 and Incoloy 800H:
Nickel content: Inconel 601 has a significantly higher nickel content than Incoloy 800H (Inconel 601 has over 60% nickel, while Incoloy 800H has approximately 40%), making Inconel 601 more suitable for extreme high-temperature environments.
Main applications: Inconel 601 excels in oxidation resistance; Incoloy 800H excels in creep/stress rupture strength.
Corrosion resistance: Incoloy 800H has good resistance to carburization and stress corrosion cracking, while Inconel 601 exhibits excellent performance in high-temperature oxidation.
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
Gnee Steel also supplies custom Inconel 601 products in various sizes and specifications. Please send us your drawings for a quote!
