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INCOlOY® alloy 825 UNS N08825/W.Nr. 2.4858

Short Description:

INCOLOY alloy 825 (UNS N08825) is a nickel-iron-chromium alloy with additions of molybdenum, copper, and titanium .It is designed toprovide exceptional resistance to many corrosive environments. The nickel content is sufficient for resistance to chloride-ion stress-corrosion cracking. The nickel in conjunction with the molybdenum and copper, also gives outstanding resistance to reducing environments such as those containing sulfuric and phosphoric acids. The molybdenum also aids resistance to pitting and crevice corrosion. The alloy’s chromium content confers resistance to a variety of oxidizing substances such as nitric acid, nitrates and oxidizing salt. The titanium addition serves, with an appropriate heat treatment, to stabilize the alloy against sensitization to inter granular corrosion.

Product Detail

Product Tags

Chemical Composition

Alloy element C Si Mn S Mo Ni Cr Al Ti Fe Cu
Incoloy 825 Min         2.5 38.0 19.5   0.6 22.0 1.50
Max 0.05 0.5 1.0 0.03 3.5 46.0 23.5 0.2 1.2   3.0

Mechanical Properties

Aolly Status

Tensile strength

Rm Mpa Min

Yield strength

R P 0. 2 Mpa Min


A 5 % Min





Physical Properties

Density g/cm3

Melting Point 




Rod, Bar, Wire and Forging Stock - ASTM B 425, ASTM B 564, ASME SB 425, ASME SB 564 

Plate, Sheet and Strip - ASTM B 424, ASTM B 906, ASME SB 424, ASME SB 906

Pipe & Tube - ASTM B 163, ASTM B 423, ASTM B 704, ASTM B 705, ASTM B 751, ASTM B 775,ASTM B 829

Other Product Forms - ASTM B 366/ASME SB 366 (Fitting)

Characteristics of Incoloy 825

IHigh-Quality Incoloy Factories

● Excellent resistance to reducing and oxidizing acids

● Good resistance to stress-corrosion cracking

● Satisfactory resistance to localized attack like pitting and crevice corrosion

● Very resistant to sulfuric and phosphoric acids

● Good mechanical properties at both room and elevated temperatures up to approximately 1000°F

● Permission for pressure-vessel use at wall temperatures up to 800°F

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