Many of our customers have the same question, that is, Incoloy 800 vs Inconel 625 – What’s the Difference? Today, I will delve into the differences between Incoloy 800 and Inconel 625, two alloys that are often considered for high-temperature and corrosion-resistant applications.
Incoloy 800 vs Inconel 625 – What’s the Difference?
Incoloy 800 vs Inconel 625 – 1. Composition and Chemical Properties
The primary difference between these two alloys lies in their composition and subsequent chemical properties. Incoloy 800, also known as UNS N08800, is primarily composed of nickel, iron, and chromium. This combination provides excellent resistance to oxidation and carburization in high-temperature environments. Additionally, the alloy contains small amounts of titanium and aluminum, which contribute to the formation of a protective oxide layer, further enhancing its corrosion resistance.
On the other hand, Inconel 625, or UNS N06625, has a higher nickel content and includes chromium, molybdenum, and iron. The molybdenum content in Inconel 625 is particularly noteworthy as it significantly improves the alloy’s resistance to corrosion in a wide range of environments, including those containing chloride ions and sulfur-bearing gases.
Incoloy 800 vs Inconel 625 – 2. Mechanical Properties
The mechanical properties of Incoloy 800 and Inconel 625 also exhibit distinct characteristics. Incoloy 800 offers good tensile strength and ductility, coupled with excellent resistance to creep deformation at elevated temperatures. This combination of properties makes it suitable for applications that require both strength and the ability to withstand deformation over extended periods.
Inconel 625, while offering similar tensile strength, excels in fatigue resistance and creep strength at even higher temperatures. This alloy maintains its mechanical properties even after prolonged exposure to severe thermal conditions, making it a preferred choice for components that operate in extremely hot environments.
Incoloy 800 vs Inconel 625 – 3. Fabrication and Weldability
Both Incoloy 800 and Inconel 625 can be fabricated using various methods, including hot and cold working techniques. However, their weldability characteristics differ slightly. Incoloy 800, due to its titanium and aluminum content, requires careful welding parameters to avoid hot cracking and ensure a sound weld. Proper welding techniques and post-weld heat treatment may be necessary to optimize the weld quality.
Inconel 625, on the other hand, is renowned for its excellent weldability. It can be welded using a variety of methods, including gas tungsten arc welding (GTAW) and gas metal arc welding (GMAW), with minimal post-weld heat treatment required. This weldability, coupled with its high corrosion resistance, makes Inconel 625 a popular choice for welding applications in corrosive environments.
Incoloy 800 vs Inconel 625 – 5. Applications
The unique properties of Incoloy 800 and Inconel 625 determine their suitability for different applications. Incoloy 800 is commonly used in the chemical processing industry, where it is exposed to high temperatures and corrosive media. Its resistance to oxidation and carburization makes it ideal for use in furnaces, heat treatment equipment, and other industrial processes.
Inconel 625 finds widespread application in the aerospace, marine, and petrochemical industries. Its excellent corrosion resistance, particularly in chloride-containing environments, makes it a preferred material for equipment that handles corrosive fluids. Additionally, its high-temperature strength and fatigue resistance make it suitable for use in jet engines, gas turbines, and other components that operate under severe thermal conditions.
Conclusion
In summary, Incoloy 800 and Inconel 625, despite their similarities in terms of corrosion resistance and high-temperature stability, exhibit distinct differences in composition, mechanical properties, weldability, and applications.
Thank you for reading our article and we hope it can help you to have a better understanding of the differences between Incoloy 800 vs Inconel 625. If you are looking for Incoloy 800 & Inconel 625 Alloy suppliers online now, we would advise you to visit Huaxiao Alloy.
As a leading supplier of high-temperature alloys from Shanghai China, Huaxiao Alloy offers customers high-quality Incoloy 800 & Inconel 625 Alloy, Inconel 602 Alloy, Inconel Alloy 600, and Inconel Alloy 601 at a very competitive price.
