Comparison of Inconel 601 and Incoloy 800H materials
Comparison of Inconel 601 and Incoloy 800H materials
Inconel 601 (a high-nickel, chromium, and aluminum alloy) exhibits excellent high-temperature strength, oxidation resistance, and creep resistance in extremely high-temperature environments (up to approximately 2000°F/1093°C); while Incoloy 800H (a nickel-iron-chromium alloy with a lower nickel content) offers excellent overall high-temperature strength, resistance to carburization/sulfidation, and stress corrosion cracking resistance under less severe but still demanding conditions (up to approximately 1800°F/982°C). Therefore, Inconel is more suitable for extreme high-temperature environments, while Incoloy is applicable to a wider range of industrial applications, such as furnaces and heat exchangers.
What are the differences between Inconel 625 and 601?
Inconel 601 has a melting point of 2467°F (1350°C), while Inconel 625 has a melting point of 2375°F (1310°C). In terms of tensile strength at room temperature, Inconel 601 ranges from 590-930 MPa, while 625 has a slightly higher strength of 690-895 MPa.
What is Inconel 601 alloy?
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 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 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.
What is Incoloy 800H alloy?
Incoloy 800H is a high-carbon, stabilized version of the Incoloy 800 series. Its key characteristics are achieved through a higher carbon content (0.05-0.10%) and specific solution heat treatment, providing 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 specifically designed for extreme environments requiring long-term exposure to high temperatures, high pressures, and thermal cycling, such as petrochemical cracking furnace tubes, high-temperature heat exchangers, industrial heaters, and nuclear power plant steam generators, making it a critical material for high-temperature pressure-bearing and thermal fatigue applications.
Comparison of the chemical compositions of Inconel 601 and Incoloy 800H
| Element | Incoloy 800H (UNS N08810) | Inconel 600 (UNS N06600) |
|---|---|---|
| Nickel (Ni) | 30.0 – 35.0 % | ≥ 72.0 % |
| Chromium (Cr) | 19.0 – 23.0 % | 14.0 – 17.0 % |
| Iron (Fe) | ≥ 39.5 % | 6.0 – 10.0 % |
| Carbon (C) | 0.05 – 0.10 % | ≤ 0.15 % |
| Aluminum (Al) | 0.15 – 0.60 % | – |
| Titanium (Ti) | 0.15 – 0.60 % | – |
| Manganese (Mn) | ≤ 1.5 % | ≤ 1.0 % |
| Silicon (Si) | ≤ 1.0 % | ≤ 0.5 % |
| Copper (Cu) | ≤ 0.75 % | ≤ 0.5 % |
| Sulfur (S) | ≤ 0.015 % | ≤ 0.015 % |
| Phosphorus (P) | ≤ 0.045 % | – |
| Al + Ti | 0.30 – 1.20 % | – |
Comparison of mechanical properties of Inconel 601 and Incoloy 800H
| Property | Incoloy 800H (Annealed) | Inconel 600 (Annealed) |
|---|---|---|
| Tensile Strength (MPa, min) | 450 – 585 | 550 – 690 |
| Yield Strength (0.2% Offset, MPa, min) | 170 – 310 | 240 |
| Elongation (% in 50 mm, min) | 30 | 30 |
| Hardness (Rockwell B) | 79 – 95 HRB | 90 HRB max |
| Hardness (Brinell HB) | 120 – 190 HB | 90 – 150 HB |
| Density (g/cm³) | 7.94 | 8.47 |
| Melting Range (°C) | 1350 – 1400 | 1370 – 1425 |
| Modulus of Elasticity (GPa) | 200 | 214 |
Inconel 601 Alloy
Composition: High nickel (>60%), chromium, aluminum.
Main Advantages: Excellent high-temperature strength, outstanding oxidation resistance (up to 2000°F/1093°C), and very good creep resistance.
Best Applications: The most demanding critical high-temperature environments, such as gas turbines, rocket engines, and high-temperature furnace components.
Incoloy 800H Alloy
Composition: Nickel-iron-chromium alloy (approximately 30-35% Ni), with controlled aluminum/titanium content in 800HT.
Main Advantages: Good overall high-temperature strength, excellent resistance to oxidation, carburization, sulfidation, and stress corrosion cracking (SCC).
Best Applications: Industrial furnaces, heat treatment equipment, process piping, heat exchangers, and applications requiring strong resistance to water/chemical corrosion.
Key Comparison Points between Inconel 601 and Incoloy 800H
Temperature: Inconel 601 can withstand higher temperatures and more demanding conditions than Incoloy 800H.
Cost/Processing: Incoloy 800H has a higher iron content, making it less expensive and easier to process (similar to stainless steel), while Inconel 601 is suitable for high-performance, critical applications.
Performance: Inconel 601 offers superior mechanical properties and performance in extreme environments; Incoloy 800H provides reliable performance in many general high-temperature 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
Gnee Steel is a supplier of inconel 601 alloy, offering a wide range of products including: seamless pipe (sizes: 4-219 mm; thickness: 0.5-20 mm); welded pipe (sizes: 5.0-1219.2 mm; thickness: 0.5-20 mm); plates (thickness: 0.1 to 100 mm; width: 10-2500 mm); strips; alloy round bars (diameter: 3-800 mm); flat bars (thickness: 2-100 mm; width: 10-500 mm); hexagonal bars (size: 2-100 mm); wire rods; and extruded profiles. We collaborate with steel mills to provide our customers with inconel 601 alloy products that meet or exceed numerous leading industry standards, including ASTM, ASME, SAE, AMS, ISO, DIN, EN, and BS standards.
Gnee Steel stocks and sells inconel 601, pipes, plates, strips, round bars, flat bars, forged billets, hexagonal steel, wire rods, and extruded profiles. Please feel free to contact us at ss@gneesteel.com for a quote.
