Alloy Information Report for Incoloy™ 825

General Characteristics of Incoloy™ 825

Incoloy™ 825 withstands chloride-iron stress-corrosive cracking, pitting and crevice attack. This is a nickel-chromium-iron alloy with molybdenum, copper and titanium that resists corrosion from oxidation and reducing media. Incoloy™ 825 is readily machinable and offers exceptional fabricability and weldability.

Chemical Composition of Incoloy™ 825

Nickel 38.0-46.0
Iron 22.0 min
Chromium 19.5-23.5
Molybdenum 2.5-3.5
Copper 1.5-3.0
Titanium 0.6-1.2
Carbon 0.05 max
Manganese 1.0 max
Sulfur 0.03 max
Silicon 0.5 max
Aluminum 0.2 max

Heat Treatment of Incoloy™ 825

Anneal between 1700° and 1800°F (927° to 982°C)
1800°F (982°C) anneal maximizes softness and fine grain structure without sacrificing corrosion resistance
1725°F (941°C) optimum stabilizing temperature
Rapid cool sections heavier than wire and sheet
Remove surface contamination before annealing

Applications of Incoloy™ 825

Equipment used to produce and handle phosphoric acid
Equipment for handling refinery and coal-washing solutions and sludge
Equipment used in the sulfuric acid pickling of copper and ferrous alloys
Paper production industry
Sour gas and oil well parts
Flue gas scrubbers

Machinability of Incoloy™ 825

Conventional machining in annealed condition

Workability of Incoloy™ 825

Hot work between 1600° and 2150°F (871° and 1177°C)
Final working between 1600° and 1800° (871° and 982°C) brings maximum corrosion resistance
Air cool; faster cooling OK depending on size of section
Well-powered, rigid equipment recommended for cold forming

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