corrosion resistance inconel alloy 825

corrosion resistance inconel alloy 825

IncoloyAlloy 825

Common Trade Names: Incoloy 825, Alloy 825, Nickelvac 825, Nicrofer 4241.

INCOLOY alloy 825 (UNS N08825, W.Nr. 2.4858) is a nickel-iron-chromium alloy with additions of molybdenum, copper, and titanium. 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 intergranular corrosion.

Available Product Forms: 
Rod, bar, forgings, wire, plate, sheet, strip, pipe, tube, pipe fittings.

Specifications

INCOLOY Alloy 825 is designated as UNS N08825 and Werkstoff Number 2.4858. It is listed in NACE MR0175 for oil and gas service. 

Rod, Bar, Wire and Forging Stock: ASTM B 564, ASTM B 425,
Plate, Sheet and Strip: ASTM B 424,

Pipe and Tube: ASTM B 423, ASTM B 163,

Pipe fittings: ASTM B366 WPNICMC

Chemical Composition

Nickel..........................................................................38.0-46.0
Iron...............................................................................22.0min.
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...................................................................1.0max. 
Sulfur..........................................................................0.03max. 
Silicon...........................................................................0.5max.
Aluminum......................................................................0.2 max.

mechanical property:

specifications:

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