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

Alloy 800HT, designated as UNS N08811, is a high-temperature, nickel-iron-chromium alloy renowned for its exceptional strength and oxidation resistance. This guide explores its key attributes and industrial uses.

Key Properties of Alloy 800HT

Alloy 800HT offers outstanding creep and rupture properties at elevated temperatures, up to 1500°F (815°C). Its composition includes controlled carbon, aluminum, and titanium levels, enhancing stability and performance under stress.

High-Temperature Mechanical Strength

The alloy maintains tensile and yield strength in extreme environments, making it ideal for prolonged high-heat applications without degradation.

Common Applications

Industries such as petrochemical, aerospace, and power generation utilize Alloy 800HT UNS N08811 for components like heat exchangers, furnace parts, and turbine systems due to its reliability.

Industrial and Chemical Processing

Its resistance to carburization and oxidation suits it for ethylene production and other aggressive chemical processes.

Performance Advantages

Users benefit from extended service life, reduced maintenance, and cost efficiency, especially in corrosive or high-temperature settings.

Frequently Asked Questions

What distinguishes Alloy 800HT from other alloys?
It features optimized carbon content for superior high-temperature strength compared to standard alloys.

Is it weldable?
Yes, with proper techniques, it maintains integrity post-welding.

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