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Alloy 825
A nickel-iron-chromium alloy (UNS N08825) with additions of molybdenum, copper, and titanium, providing exceptional corrosion resistance in both oxidizing and reducing environments.
Alloy 825 Overview
Alloy 825 (UNS N08825, Incoloy 825) is a versatile nickel-iron-chromium alloy designed for use in aggressive chemical environments. Its balanced composition provides resistance to both reducing and oxidizing acids, stress corrosion cracking, and localized attack.
Composition
- Nickel: 38-46%
- Iron: 22% min (balance)
- Chromium: 19.5-23.5%
- Molybdenum: 2.5-3.5%
- Copper: 1.5-3.0%
- Titanium: 0.6-1.2%
Applications
Chemical processing, pollution control, oil & gas (sour gas service), nuclear fuel reprocessing, acid production, and pickling equipment.
Standards
ASTM B163, B423, B829 (tubes); ASTM B407, B829 (pipe)