Alloy 800H UNS N08810: Properties, Applications, and Performance Guide

Alloy 800H UNS N08810 Overview

Alloy 800H UNS N08810 is a nickel-iron-chromium superalloy known for its excellent high-temperature strength and resistance to oxidation and carburization. This material is widely used in demanding industrial environments where reliability and durability are critical.

Key Properties and Composition

The alloy features a balanced composition of nickel, chromium, and iron, with additions of aluminum and titanium for enhanced stability. Its high creep and rupture strength make it suitable for prolonged exposure to temperatures up to 1500°F (815°C). Additionally, it resists sulfur attack and chloride stress corrosion cracking.

Industrial Applications

Common uses include furnace components, heat exchangers, and radiant tubes in petrochemical plants. It also serves in nuclear reactors and power generation systems due to its consistent performance under thermal cycling.

Performance in Extreme Conditions

Alloy 800H maintains structural integrity in corrosive atmospheres, making it ideal for chemical processing equipment. Its low carbon content minimizes sensitization, ensuring long service life.

Frequently Asked Questions

What distinguishes Alloy 800H from other grades?

Alloy 800H has controlled carbon levels and annealing treatments for superior high-temperature properties compared to standard Alloy 800.

Can it be welded easily?

Yes, it is weldable using common techniques like TIG and MIG, but post-weld heat treatment may be necessary for optimal corrosion resistance.

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