Incoloy 800 vs. Inconel 600: A Comparison of Properties, Applications, and Corrosion Resistance
Incoloy 800 vs. Inconel 600: A Comparison of Properties, Applications, and Corrosion Resistance
Incoloy 800 (an iron-nickel-chromium alloy) offers excellent high-temperature strength, creep resistance, and resistance to carburization and oxidation, making it ideal for furnaces and the petrochemical industry. Inconel 600 (with a higher nickel content and lower iron content) boasts superior overall corrosion resistance, especially in strong acid environments, and excellent high-temperature oxidation resistance, making it highly suitable for the chemical, nuclear, and aerospace industries, but at a higher cost. The choice between these alloys depends on whether you require extremely high-temperature strength (800) or broader and stronger acid/oxidation resistance (600). Generally, Inconel 600 offers superior performance, but its higher nickel content results in a higher cost.
What is INCOLOY 800?
INCOLOY 800 nickel-iron-chromium alloy was introduced to the market in the 1950s to meet the demand for heat-resistant and corrosion-resistant alloys, while also having a relatively low nickel content, as nickel was considered a "strategic" metal at the time.
Incoloy 800 is a nickel-iron-chromium austenitic alloy (typically classified as Incoloy 800/800H/800HT), characterized by its excellent creep resistance, carburization resistance, and high-temperature oxidation resistance at elevated 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 those found in 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 demanding environments involving high-temperature oxidation, carburization, and thermal fatigue.
Inconel 600 is a nickel-chromium-iron solid-solution strengthened high-temperature alloy, renowned for its exceptional high-temperature oxidation resistance (up to approximately 1150°C), excellent resistance to chloride stress corrosion cracking, and superior stability in alkaline and high-temperature pure water environments. It is widely used in heat treatment equipment, chemical processing, nuclear power plant steam generators, and aerospace applications where materials must maintain performance in extreme temperatures and corrosive media. It is a fundamental high-performance nickel-based alloy for demanding operating conditions.
Chemical composition of Inconel 600 and Incoloy 800
| Grade | Ni | Cr | C | S | Si | Mn | Cu | Fe | Al | Ti |
|---|---|---|---|---|---|---|---|---|---|---|
| Inconel 600 | 72.00 min | 14.00 – 17.00 | 0.15 max | 0.015max | 0.50 max | 1.00 max | 0.50 max | 6.00 – 10.00 | – | – |
| Incoloy 800 | 30.00 – 35.00 | 19.00 – 23.00 | 0.10 max | 0.015 max | 1.00 max | 1.50 max | 0.75 max | 39.50 min | 0.15 – 0.60 | 0.15 – 0.60 |
Inconel 600 Vs Incoloy 800 Mechanical properties
| Element | Tensile Strength | Yield Strength (0.2%Offset) | Melting Point | Density | Elongation |
|---|---|---|---|---|---|
| Inconel 600 | Psi – 95,000 , MPa – 655 | Psi – 45,000 , MPa – 310 | 1413 °C (2580 °F) | 8.47 g/cm3 | 0.4 |
| Incoloy 800 | Psi – 75,000 , MPa – 520 | Psi – 30,000 , MPa – 205 | 1385 °C (2525 °F) | 7.94 g/cm3 | 0.3 |
Comparison of High-Temperature Performance between Alloy 800 and Alloy 600
Compared to Alloy 600, Alloy 800 exhibits superior creep resistance and stress rupture resistance at high temperatures. Incoloy 800 alloy can withstand temperatures up to 1100°C, while Alloy 600 is suitable for temperatures up to 1093°C.
Corrosion Resistance Comparison of Nickel Alloy 600 and Nickel Alloy 800
Both Inconel 600 and Incoloy 800 exhibit excellent corrosion resistance, but Alloy 600 is more resistant to acidic environments, while Incoloy 800 is known for its resistance to carburization and oxidation at high temperatures. Alloy 600 is widely used in the chemical industry, while nickel alloy 800 is primarily used in heating furnace 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
