Regarding high-temperature applications, there are several stainless steel alloys to choose from, and two of the most commonly used are Incoloy 800 and SS310. These alloys offer excellent heat resistance and high strength but differ in composition and specific properties. In this blog post, we’ll look closer at Incoloy 800 and SS310 and compare these popular stainless steel alloys.
What is Incoloy 800?
Incoloy 800 is a nickel-iron-chromium alloy with excellent resistance to oxidation and carburization in high-temperature environments. It’s also known for its good mechanical properties, making it an ideal material for many industrial applications. Incoloy 800 is a versatile alloy designed for applications requiring excellent corrosion, high strength, and heat resistance. It offers exceptional features such as excellent creep rupture strength and outstanding oxidation resistance up to 1050°C (1922°F). This makes it ideal for use in harsh environments such as petroleum refining.
What is SS310?
SS310 is an austenitic stainless steel composed of nickel, chromium and manganese. It offers good corrosion resistance and ductility for mechanical properties. SS310 has a melting point of 1402-1454°C, which allows it to be welded easily while providing excellent strength at high temperatures. The material is very resistant to oxidation in air and inert atmospheres, making it an ideal choice for applications such as cookware or firebrick lining. It can also be used in food processing operations due to its low carbon content, allowing the product to remain clean over long periods without corroding.
Difference Between Incoloy 800 and SS310
Composition
Incoloy 800 is a nickel-iron-chromium alloy that contains aluminium and titanium for stronger resistance to corrosion and oxidation. Its high nickel content gives it excellent strength at high temperatures. SS310, on the other hand, is a high-chromium and nickel-content stainless steel that also contains molybdenum. This makes it resistant to corrosive environments and high temperatures. While both alloys contain chromium and nickel, Incoloy 800 has more elements.
Heat Resistance
Regarding heat resistance, Incoloy 800 is a better choice for high-temperature applications. This alloy can withstand temperatures up to 1100°C and is used in industrial furnaces, heat exchangers, and chemical processing equipment applications. SS310 has good heat resistance up to 1150°C. It is used in furnace linings, kilns, and heat treatment baskets.
Strength
Incoloy 800 has excellent high-temperature strength and is commonly used in heat exchangers and petrochemical applications. Its high nickel content provides good creep-rupture strength, making it suitable for extreme temperatures. SS310 also has good strength at high temperatures due to its high nickel and chromium content.
Corrosion Resistance
Both Incoloy 800 and SS310 have good resistance to corrosion. Incoloy 800 is designed to resist nitric acid and organic acid corrosion. SS310 is resistant to sulfidation, oxidation, and carburization in high-temperature environments.
Applications
Incoloy 800 is used in several high-temperature applications, such as heat exchangers, industrial furnaces, petrochemical processing, and power plant piping. SS310 is used in furnace parts, kiln linings, and aircraft components.
Conclusion
Incoloy 800 and SS310 are high-performance stainless steel alloys offering heat, strength, and corrosion resistance. Although these alloys share many similarities, Incoloy 800 is better suited to extremely high-temperature applications, while SS310 is commonly used in furnaces and kilns. When choosing between Incoloy 800 and SS310, it’s important to consider each alloy’s specific application requirements and strengths.
Rachana is a dedicated and ambitious young woman who has made a name for herself in the metal industry. From her earliest days in the industry, Rachana showed a natural talent for problem-solving and a keen eye for detail. In her free time, She enjoys reading up on the latest advancements in the industry, as well as exploring new ways to innovate and improve upon existing processes.
