Alloy 825 UNS N08825: Properties, Applications, and Performance Guide

Alloy 825 UNS N08825 Overview

Alloy 825 UNS N08825 is a nickel-iron-chromium alloy with additions of molybdenum, copper, and titanium. This versatile material offers exceptional resistance to corrosion, making it ideal for harsh environments. Its balanced composition ensures stability under high temperatures and aggressive chemical exposure.

Key Properties and Benefits

The alloy provides excellent resistance to reducing and oxidizing acids, along with superior stress-corrosion cracking prevention. Key mechanical properties include high tensile strength and good ductility, even at elevated temperatures. These characteristics make it a reliable choice for demanding industrial applications.

Industrial Applications and Uses

Alloy 825 UNS N08825 is widely used in chemical processing, pollution control, and nuclear fuel reprocessing systems. It serves effectively in heat exchangers, pickling tanks, and sulfuric acid coolers. The material’s performance in seawater handling makes it valuable for offshore and marine engineering projects.

Performance in Extreme Conditions

This nickel alloy maintains structural integrity in temperatures ranging from cryogenic to 540°C. It withstands phosphoric and sulfuric acid environments while resisting pitting and crevice corrosion. The titanium stabilization prevents sensitization during welding processes.

Frequently Asked Questions

What makes Alloy 825 suitable for chemical processing?

Its composition provides outstanding resistance to various corrosive media, including acids and alkaline solutions.

Can Alloy 825 be welded easily?

Yes, it offers good weldability using common techniques while maintaining corrosion resistance in welded areas.

How does it compare to stainless steels?

Alloy 825 demonstrates superior performance in chloride-containing environments and stronger acid resistance than standard stainless steels.

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