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

Alloy 800HT UNS N08811 is a high-temperature, iron-nickel-chromium alloy known for its exceptional strength and oxidation resistance. This material is widely used in demanding industrial environments, making it essential for engineers and procurement specialists. In this guide, we explore its key properties, common applications, and performance benefits to help you make informed decisions.

Key Properties of Alloy 800HT

Alloy 800HT offers excellent creep rupture strength and carburization resistance, thanks to its balanced composition of nickel, chromium, and iron. It maintains structural integrity at temperatures up to 1500°F (816°C), making it ideal for heat treatment equipment and furnace components. Its low carbon content enhances stability, while titanium and aluminum additions improve aging resistance.

Industrial Applications

Common uses include petrochemical processing, power generation, and thermal processing systems. You’ll find Alloy 800HT in reformer tubes, radiant coils, and heat exchangers, where thermal fatigue resistance is critical. Its performance in corrosive atmospheres also makes it suitable for sulfur recovery units and nuclear steam generators.

Performance in High-Temperature Environments

This alloy excels under cyclic heating and prolonged exposure to aggressive media. Its ability to resist oxidation and carburization reduces maintenance needs and extends service life, providing cost savings in operations like ethylene production and ammonia reforming.

Frequently Asked Questions

What distinguishes Alloy 800HT from other nickel alloys?

Alloy 800HT is optimized for high-temperature strength with controlled carbon levels, unlike standard Alloy 800, ensuring better performance in creep-prone applications.

Can Alloy 800HT be welded or fabricated easily?

Yes, it is weldable using techniques like gas tungsten arc welding (GTAW), though post-weld heat treatment may be required to maintain properties.

Optimize Your Projects with Alloy 800HT

For reliable performance in extreme conditions, consider integrating Alloy 800HT UNS N08811 into your designs. Explore certified suppliers to source high-quality materials tailored to your specifications.

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