Today, we will delve into a comparison between two highly regarded nickel-based alloys: Inconel 718 vs Hastelloy C276. Both alloys offer exceptional resistance to corrosion and high-temperature performance, but there are some key differences that make them suitable for different applications.
Inconel 718 vs Hastelloy C276: What’s the Difference?
Inconel 718 vs Hastelloy C276 – 1. Definition
Inconel 718, also known as UNS N07718, is a precipitation-hardenable nickel–chromium alloy that combines the strength of a forged steel with the corrosion resistance of a nickel-based alloy. It was first developed in the 1950s and has since become a widely used material in the aerospace, oil and gas, and chemical processing industries.
Hastelloy C276, also known as UNS N10276, is a nickel-molybdenum-chromium superalloy that is renowned for its exceptional resistance to a wide range of corrosive environments. It was developed in the 1960s and has since found applications in the most severe chemical processing, oil and gas, and marine environments.
Inconel 718 vs Hastelloy C276 – 2. Key Features
Key Features of Inconel 718:
- High Strength: Inconel 718 exhibits high strength, even at elevated temperatures, making it suitable for demanding structural applications.
- Good Corrosion Resistance: The alloy resists corrosion in a wide range of environments, including those containing chlorides, sulfides, and oxidizing agents.
- Excellent Fabricability: Inconel 718 can be easily welded, brazed, and formed, making it versatile in manufacturing processes.
- Low Coefficient of Thermal Expansion: This alloy has a relatively low coefficient of thermal expansion, minimizing thermal stress during high-temperature operations.
Key Features of Hastelloy C276:
- Excellent Corrosion Resistance: Hastelloy C276 offers superior resistance to chloride-induced stress corrosion cracking, pitting, and crevice corrosion, making it an ideal choice for highly corrosive environments.
- High Thermal Stability: The alloy maintains its mechanical properties at elevated temperatures, making it suitable for high-temperature applications.
- Good Fabricability: Hastelloy C276 can be easily welded and formed, although special considerations should be made for welding to maintain corrosion resistance.
- Low Magnetic Permeability: This alloy has low magnetic permeability, minimizing the risk of magnetic-induced corrosion in certain environments.
Inconel 718 vs Hastelloy C276 – 3. Comparison
Both Inconel 718 and Hastelloy C276 offer excellent resistance to corrosion and high-temperature performance. However, there are some key differences between the two alloys:
- Corrosion Resistance: While both alloys offer good corrosion resistance, Hastelloy C276 has superior resistance to chloride-induced stress corrosion cracking, making it the preferred choice for the most severe corrosive environments.
- Strength: Inconel 718 exhibits higher strength than Hastelloy C276, particularly at elevated temperatures, making it more suitable for structural applications.
- Fabricability: Both alloys can be easily welded and formed, but Hastelloy C276 may require special welding techniques to maintain its corrosion resistance.
- Applications: Inconel 718 is commonly used in aerospace, oil and gas, and chemical processing applications, while Hastelloy C276 finds its primary use in the most severe chemical processing and marine environments.
Conclusion
In summary, Inconel 718 vs Hastelloy C276 are both excellent alloys with unique properties that make them suitable for different applications. The choice between the two depends on the specific requirements of the application, such as the severity of the corrosive environment, the need for high strength, and the fabrication requirements.
Thank you for reading our article and we hope it can help you to have a better understanding of the differences between Inconel 718 vs Hastelloy C276. If you are looking for Inconel 718 & Hastelloy C276 suppliers online now, please don’t hesitate to contact Huaxiao Alloy.
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