Nicrofer 4221 – alloy 825

Chun & Vollerin - Corrosion resistant alloys: alloy 825, 718, 926, 617, 201, 400, K-500, C-276, 625, 59, C-22, 20, 31, 28

Chun & Vollerin - Corrosion resistant alloys: alloy 825

Nicrofer 4221 - alloy 825

MATERIAL DESCRIPTION, MAIN CHARACTERISTICS
The Nicrofer 4221 - alloy 825 is a titanium-stabilized fully austenitic nickel-iron-chromium alloy with molybdenum and copper additions.
This alloy has an excellent resistance to stress-corrosion cracking, good resistance to pitting and crevice corrosion. It's good resistant to oxidizing and reducing acids such as sulfuric, phosphoric and nitric acid and to organic alkaline solutions, alkalis and seawater: approved for pressure vessel operating temperatures up to 425°C (800°F).

FABRICATION CHARACTERISTICS
Formability: good
Weldability: good

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