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Inconel 800 Flanges – Composition,Properties and Uses

Inconel 800 Flanges

Inconel 800 is a high-strength alloy that can withstand extreme environments, making it an ideal material for various industrial applications. One commonly used form of this alloy is the Inconel 800 flange, a connecting piece that joins two pipes or fittings. These Incoloy 800 Flanges exhibit exceptional physical and mechanical properties and excellent corrosion and heat resistance. In this blog, we will dive deeper into the composition, properties, and applications of Inconel 800 flanges.

 

Inconel 800 Flanges Composition

Inconel 800 is a nickel-iron-chromium alloy with a significant amount of iron. The addition of chromium and nickel enhances the strength of the alloy. At the same time, iron allows for forming a protective oxide layer that enhances its corrosion resistance. Small amounts of copper, carbon, and aluminium are added to enhance the material’s properties.

Grade C Mn Si S Cu Fe Ni Cr Al Ti
800 0.10 max 1.50 max 1.00 max 0.015 max 0.75 max 39.50 min 30.00 – 35.00 19.00 – 23.00 0.15 – 0.60 0.15 – 0.60
800H 0.05 – 0.10 1.50 max 1.00 max 0.015 max 0.75 max 39.50 min 30.00 – 35.00 19.00 – 23.00 0.15 – 0.60 0.15 – 0.60
800HT 0.06 – 0.10 1.50 max 1.00 max 0.015 max 0.75 max 39.50 min 30.00 – 35.00 19.00 – 23.00 0.15 – 0.60 0.15 – 0.60

 

Inconel 800 Flanges Physical Properties

Inconel 800 flanges exhibit excellent physical properties. The density of these flanges ranges from 7.94 g/cm³ to 8.17 g/cm³, which is significantly higher than other alloys. They are highly resistant to high-temperature oxidation and corrosion, as the protective oxide layer formed on the material’s surface acts as a barrier against further oxidation or corrosion. Furthermore, they exhibit exceptional resistance to spalling, cracking, and scaling, making them ideal for high-temperature environments.

 

Inconel 800 Flanges Mechanical Properties

The mechanical properties of Inconel 800 flanges are equally impressive. They have a tensile strength of 520 MPa and a yield strength of 205 MPa, making them exceptionally strong. They have a moderately high elongation rate of about 30%, which indicates that they can exhibit a certain degree of flexibility when exposed to tensile stress.

 

Element Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
800 / 800H / 800HT 7.94 g/cm3 1385 °C (2525 °F) Psi – 75,000 , MPa – 520 Psi – 30,000 , MPa – 205 30 %

 

Inconel 800 Flanges Equivalent

NICKEL ALLOY WERKSTOFF NR. UNS BS GOST JIS AFNOR EN OR
Incoloy 800 Flange 1.4876 N08800 NA 15 ЭИ670 NCF 800 Z8NC32-21 X10NiCrAlTi32-20 XH32T
Incoloy 800H Flange 1.4958 / 1.4876 N08810 NA 15(H) ЭИ670 NCF 800H Z8NC33-21 X5NiCrAlTi31-20 XH32T
Incoloy 800HT Flange 1.4859 / 1.4876 N08811 NA 15(HT) ЭИ670 NCF 800HT X8NiCrAlTi32-21 XH32T

Inconel 800 Flanges Uses

Inconel 800 flanges are utilized in various industries, including the petrochemical, power generation, and aerospace industries. These flanges are highly corrosion-resistant and heat-resistant, making them ideal for high-temperature applications such as furnace components, pipes, and valves. They are also used as connectors in chemical processing industries and oil refineries.

 

Inconel 800 Flanges Heat Treatment

Inconel 800 flanges can be heat-treated to enhance their mechanical properties. Solution annealing is performed at 1093°C for 30 minutes, followed by quenching. This process enhances the structural uniformity of the material and improves its tensile strength.

 

Inconel 800 Flanges Corrosion Resistance

Inconel 800 flanges exhibit excellent corrosion resistance. Their protective oxide layer enhances their resistance to oxidation and corrosion, even in high-temperature and corrosive environments. In addition, these flanges are highly resistant to stress corrosion cracking and pitting resistance.

 

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Conclusion

Inconel 800 flanges are highly versatile and exhibit excellent physical and mechanical properties, making them ideal for various industrial applications. Their exceptional heat and corrosion resistance make them popular in high-strength alloy applications. By understanding the composition, properties, and applications of Inconel 800 flanges, industrial professionals can make informed decisions when choosing materials for their applications.

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