INCOLOY ® alloy 800

Alloy 800 is a nickel-chromium iron alloy which is typically used in high-temperature service applications where resistance is required from the effects of high-temperature corrosion such as oxidation and carburization. Incoloy 800 is a stable austenitic structure which demonstrates good resistance to thermal cycling and finds application in the iris of theatrical spotlights, heater element sheathing, heat exchangers and petrochemical process piping (pigtails).

INCOLOY® 800 Chemical Composition (%)

INCOLOY® 800H Chemical Composition (%)

INCOLOY® 800HT Chemical Composition (%)

Applications of INCOLOY 800

Commercial applications for this engineering material include:

• Furnace components
• Steam/hydrocarbon reforming components
• Petrochemical furnace cracker tubes
• Electrical heating elements
• Heat exchangers
• Power generation
• Pressure Vessels
• Hydrocarbon plants

Physical Properties

The following table discusses the physical properties of INCOLOY alloy 800

Corrosion Resistance Incoloy 800

Welded Pipe Incoloy 800 have excellent corrosion resistance, making them ideal for harsh environments. The ASTM B407 Pipe resistance to oxidation and carburization makes it suitable for use in high-temperature applications. In contrast, Alloy 800 Seamless Pipe resistance to sulfur and saltwater makes it ideal for use in chemical processing and petrochemical industries.

 ASME SB 407 UNS N08800 Pipes Heat Treatment

ASTM B407 Alloy 800 Pipe undergo several heat treatment processes to enhance their properties further. The annealing process involves heating the material at a high temperature, followed by slow cooling, which relieves stress and enhances the material’s formability. The ASTM B407 UNS N08800 material can also undergo cold working, which involves shaping it at a low temperature to increase its strength and durability.

Incoloy 800 Welded Pipes Uses 

Incoloy Alloy 800 pipes find use in various industrial applications, including chemical processing, aerospace, power generation, and petrochemical industries. Incoloy 800 Polished Pipes high-temperature strength makes it ideal for gas turbine components, heat exchangers, and furnace muffles. Additionally, the inconel 800 material’s resistance to corrosion makes it suitable for use in chemical processing and petrochemical plants.

What Is The Difference Between Inconel 800 And Incoloy 800

The Incoloy 800 has 30-35% nickel, 19-23% chromium and other materials such as carbon, aluminium, titanium and up to 39% iron. The Inconel 800 also has similar composition. The materials have manganese, silicon, copper, aluminium, titanium, carbon and sulfur. These materials have good resistance to oxidation and carburization processes. These are resistant at intermediate temperatures.
The Inconel products from a stable oxide layer when they are heated.

This allows them to be age-hardened and to have high oxidation resistance in the long run. When used over a certain period, they Inconel becomes corrosion-resistant on the surface due to the patina formation. The Incoloy materials have higher iron composition and are cheaper compared to the Inconel products. They are also resistant to corrosion of various materials including steam and acids. These materials are resistant to seawater, sour gas, and brine environments. The chloride ion corrosion resistance is one of the major factors that contribute for the use of incoloy grades in different industrial applications.

 Inconel 800 Vs Incoloy 800

The Inconel materials are used in high-heat applications and food-grade applications. Incoloy and Inconel are registered trademarks for nickel-based superalloys. These were produced by the Special Metals Corporation and have different applications. The Inconel are nickel-chromium alloys with high oxidation resistance properties. The Incoloy material is mostly nickel-based can perform under high temperatures as well. Their corrosion resistance is mostly against concentrated acids such as sulfuric acids. Therefore the incoloy material could be used in acid production plants and in chemical applications. The different materials have different types of mechanical properties as well.

The Inconel 800 has about 536MPa minimum tensile strength and 150MPa minimum yield strength at room temperature. The Incoloy 800 has 600MPa minimum tensile strength and 275MPa minimum yield strength. The Incoloy material is stronger than the Inconel and therefore it could be used in high-strength applications. The elongation at break for Incoloy is at 45%. The density of Incoloy 800 is also high with 7.94 grams per cubic centimeter. These materials could have the additions of molybdenum, copper, silicon and nitrogen in varying quantities based on the different grades.

Both these materials are used to produce bars, rods, pipes, tubes, flanges, fittings and other types of products for use in different applications. These can be welded with most common welding procedures given the right filler material is used. The forming operations are easy to carry out as they possess good ductility. Hot working and cold working are possible on these materials with the standard tools. They can be heat treated and annealed to improve the hardness. The applications can also include sheathing, heating elements, nuclear steam tubes, heat exchangers, boilers, superheaters and in carburizing equipment.

Conclusion

Thanks to Incoloy UNS N08800 Pipes unique properties, Inconel 800 pipes are a vital component in various industrial applications. Alloy 800 nickel, iron, and chromium composition, combined with small amounts of carbon, aluminium, titanium, and copper, provides them with high-temperature strength, good formability, and excellent corrosion resistance. Understanding the physical and mechanical properties of UNS N08800 Pipes is crucial in selecting the right material for your application. With proper heat treatment and handling, Inconel 800 pipes can provide exceptional performance and durability in various industrial applications.