Alloy 825 UNS N08825: Properties, Applications, and Benefits
Alloy 825 UNS N08825 is a nickel-iron-chromium alloy with additions of molybdenum, copper, and titanium. This robust material is known for its exceptional resistance to corrosion in a wide range of aggressive environments.
Key Properties and Composition
The chemical composition of Alloy 825 provides outstanding resistance to reducing and oxidizing acids. Its high nickel content shields it from chloride-ion stress-corrosion cracking, while the molybdenum and copper enhance its resistance to sulfuric and phosphoric acids. The titanium addition stabilizes the alloy against sensitization during welding.
Industrial Applications
Due to its impressive properties, Alloy 825 UNS N08825 is extensively used in chemical processing, pollution control, and acid production. It is a preferred material for heat exchangers, pickling tanks, and sulfuric acid coolers, offering long-term reliability.
Advantages and Benefits
The primary benefits of using this nickel alloy include excellent mechanical strength at elevated temperatures, superior pitting and crevice corrosion resistance, and good fabricability. These advantages translate into reduced maintenance costs and extended equipment service life.
Frequently Asked Questions
What is the temperature range for Alloy 825?
It performs well from cryogenic temperatures up to around 540°C (1000°F).
Is Alloy 825 weldable?
Yes, it is readily weldable by common techniques, though post-weld heat treatment may be recommended.
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