Properties of Alloy 825 UNS N08825

Alloy 825 UNS N08825 is a nickel-iron-chromium alloy with additions of molybdenum and copper. It offers excellent resistance to corrosion, particularly in sulfuric and phosphoric acids. Its high nickel content provides immunity to chloride-ion stress-corrosion cracking.

High-Temperature Performance

This alloy maintains strength and oxidation resistance at elevated temperatures up to 540°C. It is stabilized with titanium to prevent sensitization during welding or high-temperature exposure.

Applications Across Industries

Alloy 825 UNS N08825 is widely used in chemical processing, nuclear fuel reprocessing, and acid production. Its versatility makes it ideal for heat exchangers, pickling equipment, and offshore oil and gas components.

Nuclear and Marine Uses

In nuclear applications, it handles radioactive waste solutions. Marine engineers value it for seawater cooling systems due to its pitting and crevice corrosion resistance.

Key Benefits for Engineers

This alloy combines fabrication ease with longevity. It can be welded using common techniques and offers superior performance in reducing and oxidizing environments, reducing maintenance costs.

Cost-Efficiency

Long service life and reduced downtime make it economically advantageous despite higher initial material costs compared to standard stainless steels.

Frequently Asked Questions

What is the maximum service temperature?
It performs reliably up to 540°C in continuous service.

Is it magnetic?
Yes, due to its iron content, it exhibits slight magnetic permeability.

Can it be welded easily?
Yes, using TIG, MIG, or shielded metal arc welding with matching filler metals.

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