General Description

Incoloy 825 is a nickel-iron-chromium super alloy with addition of molybdenum and copper, resisting wide range of corrosive environments and intergranular sensitization.

Incoloy 825 has exceptional resistance to seawater and to reducing chemicals, such as sulfuric and phosphoric acids. Because it is stabilized against sensitization, Incoloy 825 resists intergranular corrosion. This alloy contains sufficient nickel to make it resistant to chloride stress-corrosion cracking. Its molybdenum content provides resistance to pitting. Its chromium content provides resistance to oxidizing media, such as nitric acid, nitrates, and oxidizing salts.

Typical applications include phosphoric acid evaporators, pickling equipment, chemical processing vessels and piping, equipment for recovery of spent nuclear fuel, propeller shafts, tank trucks and so on.

Chemical Composition

Grade Ni% Cr% Mo% Fe% Al% Ti% C% Mn% Si% Cu% P% S%
Incoloy 825 38-46 19.5-23.5 2.5-3.5 Bal. Max 0.2 0.6-1.2 Max 0.05 Max 1.0 Max 0.5 1.5-3.0 Max 0.02 Max 0.03


Grade UNS Werkstoff Nr.
Incoloy 825 N08825 2.4858

Physical Properties

Grade Density Melting Point
Incoloy 825 8.1g/cm3 1370°C-1400 °C

Mechanical Properties

Heat Treatment Tensile Strength Yield Strength σp0.2/MPa Elongation
σ5 /%
Brinell Hardness
Solution Treatment 550 N/mm² 250 N/mm² 35% ≥200

Our Production Standard

Incoloy 825 Bar Forging Parts Welded Tube Seamless Tube Sheet/Strip
ASTM ASTM B425 ASTM B564 ASTM B704/705 ASTM B423 ASTM B424

Welding of Incoloy 825

Any traditional welding procedures can be used to weld Incoloy 825 to similar alloys or other metals, such as gas tungsten arc welding(GTAW), plasma arc welding (PAW), metal inertia gas welding (MIG) and so on. Before welding, remove scale, grease, mark and imprint.

Recommend filler wire regarding welding Incoloy 825: ERNiCrMo-3 or ERNiFeCr-1.

Size Range

Incoloy 825 wire, bar, rod, strip, forging, plate, sheet, tube, fastener and other standard forms are available.

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