Is Hastelloy more expensive than Inconel?
What is Inconel?
718 Steel Bar, 718 Steel Alloy Bar
Inconel is a nickel-based alloy known for its high temperature and corrosion resistance, especially suitable for use in extreme temperature and mechanical force conditions. Inconel alloy has a wide range of applications in the aerospace, electrical, and chemical industries, especially in heated and cyclic components. Common Inconel brands include 625 and 718, which have excellent corrosion resistance and strength.
What is Hastelloy?
Hastelloy is a high-performance nickel-based alloy known for its excellent corrosion resistance, especially suitable for extreme environments such as chemical processing, offshore engineering and power generation industries. It can resist attack by oxidizing and reducing chemicals and avoid pitting and stress corrosion cracking. Common Hastelloy grades include C22, C276 and X, each optimized for specific application requirements.
Hastelloy vs. Inconel: What is the difference between them?
Hastelloy vs Inconel Equivalent Grades:
| Alloy | Common Grades | UNS Standard | Typical Applications |
|---|---|---|---|
| Hastelloy | C276 | N10276 | Chemical equipment, flue gas scrubbers, marine systems |
| C22 | N06022 | Storage and transport of acidic chemicals | |
| X | N06002 | Combustion chambers of jet engines, high-temperature heat exchangers | |
| Inconel | 625 | N06625 | High-temperature piping, jet engines, marine applications |
| 718 | N07718 | Turbine blades, fasteners, aerospace components | |
| 600 | N06600 | High-temperature industrial furnaces, heat exchangers for chemical plants |
Hastelloy vs Inconel Alloy Chemical Composition:
| Element (%) | Hastelloy C276 | Hastelloy X | Inconel 625 | Inconel 718 |
|---|---|---|---|---|
| Ni | 57.0 | 47.0 | 58.0 | 50.0–55.0 |
| Cr | 15.5 | 22.0 | 20.0–23.0 | 17.0–21.0 |
| Mo | 16.0 | – | 8.0–10.0 | 2.8–3.3 |
| Fe | 5.0 | 18.0 | ≤5.0 | 17.0 |
| Co | ≤2.5 | 1.5 | ≤1.0 | ≤1.0 |
| Al | – | – | ≤0.4 | 0.2–0.8 |
Hastelloy vs Inconel Alloy Mechanical Properties:
| Property | Hastelloy C276 | Hastelloy X | Inconel 625 | Inconel 718 |
|---|---|---|---|---|
| Tensile Strength (MPa) | 690 | 760 | 827 | 1034 |
| Yield Strength (MPa) | 283 | 340 | 414 | 724 |
| Elongation (%) | 50 | 30 | 30 | 25 |
| Hardness (HB) | 200 | 220 | 215 | 240 |
Applications of Hastelloy vs Inconel Alloys:
Hastelloy Applications
Hastelloy alloy is widely used in industries that require high corrosion resistance, especially in chemical processing, aerospace, marine environments, and nuclear reactors. Some key applications include:
Chemical Processing: Due to its resistance to a wide range of corrosive substances, Hastelloy is often used in reactors, heat exchangers, and piping that handle corrosive chemicals.
Aerospace: Hastelloy is used in rocket propulsion systems, turbine blades, and other high-performance components due to its ability to withstand extreme temperatures and corrosive environments.
Marine Environments: Hastelloy alloy is used in components exposed to seawater due to its resistance to chloride-induced stress corrosion cracking.
Nuclear Reactors: The alloy's resistance to radiation-induced corrosion makes it suitable for components in nuclear reactors and other high-radiation environments.
Inconel Applications
Inconel alloy is known for its high-temperature strength, oxidation resistance, and ability to maintain integrity under extreme conditions. They are commonly used in:
Aerospace: Inconel is often used in components in gas turbines, jet engines, and exhaust systems, which often need to withstand high temperatures and pressures.
Power Generation: Inconel is often used in components of gas turbines, heat exchangers, and other equipment used in power plants.
Chemical Processing: Inconel is used in equipment exposed to high temperatures and corrosive chemicals, including reactors, furnaces, and heat exchangers.
Marine Applications: Inconel's resistance to oxidation at high temperatures allows it to be used in exhaust systems and other high-pressure marine environments.
