Super Alloy / NI-825

Nickel 825 is an austenitic nickel-iron-chromium alloy with additions of molybdenum, copper and titanium. It was developed to provide exceptional corrosion resistance in both oxidizing and reducing environments. The alloy is resistant to chloride stress-corrosion cracking and pitting. Alloy 825 is especially resistant to sulfuric and phosphoric acids. This nickel steel alloy is used for chemical processing, pollution-control equipment, oil and gas components, nuclear fuel reprocessing, acid production, and pickling equipment. (UNS N08825)

Chemical Makeup

Element Min Max
Carbon, C - 0.05
Manganese, Mg - 1
Silicon, Si 1 0.5
Sulfur, S - 0.03
Chromium, Cr 19.5 23.5
Molybdenum, Mo 2.5 3.5
Nickel, Ni 38 46
Copper, Cu 1.5 3
Aluminum, Al - 0.6
Titanium, Ti 0.6 1.2
Iron, Fe 22 -

Common Applications

  • Industrial Industrial
  • Power Generation Power Generation


  • Exceptional Corrosion Resistance
  • Oxidation Resistance

We stock NI-825 to the following specifications:

  • ASME-SB-425
  • ASTM-B-425
  • UNS-N-08825

Click on a cross-section to see the sizes we stock:

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