Alloy 800HT UNS N08811: Properties, Applications, and Performance Guide

Alloy 800HT, designated as UNS N08811, is a high-temperature, nickel-iron-chromium alloy known for its exceptional strength and oxidation resistance. This advanced material is widely used in demanding industrial applications due to its stability and durability under extreme conditions.

Key Properties and Characteristics

Alloy 800HT offers excellent mechanical properties, including high tensile and creep-rupture strength at elevated temperatures up to 1500°F (815°C). Its composition includes controlled amounts of titanium and aluminum, which enhance its structural stability. Additionally, it provides superior resistance to oxidation and carburization, making it ideal for high-heat environments.

Common Applications

This alloy is extensively utilized in industries such as petrochemical, nuclear, and thermal processing. Typical applications include heat treatment equipment, furnace components, and steam/hydrocarbon reformer tubing. Its reliability in corrosive atmospheres ensures long-term performance in critical systems.

Performance and Durability

Users benefit from Alloy 800HT’s consistent performance under cyclic thermal conditions and mechanical stress. It maintains integrity over prolonged periods, reducing maintenance needs and downtime. For detailed technical specifications, consider exploring Alloy 800HT UNS N08811 resources from trusted suppliers.

Frequently Asked Questions

What distinguishes Alloy 800HT from other alloys?
It features enhanced high-temperature strength and oxidation resistance due to its optimized chemical composition.

Is it suitable for welding?
Yes, it can be welded using common techniques, but post-weld heat treatment is recommended for optimal properties.

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