Incoloy 800 vs SS 316 – What’s the Difference

Incoloy 800 vs SS 316

When selecting the right material for your industrial equipment, numerous alloys exist. Two commonly used options are Incoloy 800 and SS 316. While they may appear similar, they have distinct differences that can significantly affect their performance in your application. In this blog post, we will discuss the difference between Incoloy 800 and SS 316, their properties, benefits, and limitations to help you make an informed decision.

What is Incoloy 800?

Incoloy 800 is a group of alloys that contain nickel, iron, and chromium. It is recognized for its excellent corrosion resistance, particularly in high-temperature environments. Incoloy 800 can withstand a temperature range of -20°C to 1000°C and has exceptional strength and durability. It is also resistant to oxidation, carburization, and sulfidation. Incoloy 800 has a low risk of stress-corrosion cracking, making it a popular choice for industrial furnaces, chemical plants, and power generation facilities.

What is SS 316

On the other hand, SS 316 is a commonly used stainless steel grade known for its excellent corrosion resistance, even in harsh environments. It is an austenitic stainless steel that contains nickel, molybdenum, and chromium. SS 316 has a temperature range of -50°C to 870°C and has excellent weldability and formability. It is often used in marine applications and the food and beverage industry due to its resistance to corrosion and staining.

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Difference Between Incoloy 800 and SS 316

The main difference between Incoloy 800 and SS 316 is their composition and operating temperatures. Incoloy 800 is a high-nickel alloy that can handle temperatures higher than SS 316, making it perfect for high-temperature applications. SS 316, on the other hand, has excellent corrosion resistance but is not suited for high-temperature environments. It is critical to consider the medium’s operating temperature, environment, and chemical properties when selecting the right alloy.

Incoloy 800 and SS 316 have benefits and limitations, making understanding their performance under specific conditions necessary. Incoloy 800 has excellent thermal stability and resistance to carburization, making it ideal for carburizing furnaces, heat treatment equipment, and gas turbines. However, it is unsuitable for reducing hydrogen environments and should not be exposed to sulfur gases for extended durations. SS 316, on the other hand, can be used in a wide range of applications and environments, but it has reduced strength at higher temperatures. It is crucial to consider the specific application’s requirements when selecting the alloy to use.


In conclusion, selecting the right alloy for your industrial equipment involves considering various factors such as temperature range, chemical properties of the medium, and the environment. Incoloy 800 and SS 316 are popular options with specific properties and limitations. Understanding the differences between these alloys will ensure that you choose the best option for your application, leading to long-lasting, efficient, and reliable equipment. At the end of the day, it’s all about making the right decision based on what your equipment needs to function effectively and efficiently.



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