When choosing the right alloy for your industrial processes, it can be overwhelming to sort through all the options available. Two of the most commonly used alloys in industrial settings are Incoloy 800 and Inconel 800. While they may seem to have similar names and properties, the truth is that they are quite different from each other. In this blog post, we will explore the difference between Incoloy 800 and Inconel 800, their properties, characteristics, and applications to help you understand which alloy fits your specific needs.
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Difference Between Incoloy 800 and Inconel 800
Chemical Composition
The primary difference between Incoloy 800 and Inconel 800 is how they are composed at a chemical level. Incoloy 800 is an alloy with a high nickel, chromium, and iron content, with some traces of copper, titanium, and aluminium. Its composition makes it highly resistant to corrosive and oxidizing environments and suitable for high-temperature applications. On the other hand, Inconel 800 is an alloy with a higher concentration of nickel, iron, and chromium, with some additions of titanium and aluminium. This composition gives Inconel 800 superior oxidation resistance and makes it suitable for extreme temperature environments.
Mechanical Properties
Regarding mechanical properties, Incoloy 800 and Inconel 800 also differ. Incoloy 800 has a lower mechanical strength than Inconel 800 but higher creep and rupture strength at high temperatures. This means that Incoloy 800 is more ductile and can withstand constant stress and deformation better than Inconel 800, which is more brittle and prone to cracking under high pressure. However, Inconel 800 is more resistant to fatigue and corrosion, making it suitable for harsher environments where mechanical stress is a major concern.
Applications
Incoloy 800 and Inconel 800 are commonly used in various industrial applications requiring high-temperature and corrosive resistance. Incoloy 800 is commonly used in chemical processing, industrial furnace components, and heat exchangers. It is also used in producing seawater and freshwater evaporators, where its resistance to saltwater corrosion is essential. Inconel 800, on the other hand, is used in gas turbine blades, turbocharger rotors, and exhaust systems, where its excellent oxidation and corrosion resistance properties are needed to withstand high-temperature environments.
Cost
As with any alloy, the cost of Incoloy 800 and Inconel 800 is a major factor in deciding which one to use. In general, Incoloy 800 is less expensive than Inconel 800 due to its lower nickel and chromium content. However, the cost may vary depending on the specific application and the required properties of the alloy. It is essential to consider the long-term maintenance and replacement costs when selecting an alloy to avoid unnecessary expenses down the line.
Conclusion
In summary, Incoloy 800 and Inconel 800 are similar-looking alloys with distinct differences in chemical composition, mechanical properties, and applications. Choosing between the two will depend on the specific requirements of your industrial processes, such as temperature, corrosion, mechanical stress, and budget. It is always wise to consult a professional metallurgist or engineer to select the right alloy to optimize your industrial processes’ efficiency and safety.
