Incoloy 825

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Product Description

Incoloy 825

Incoloy 825

Incoloy 825 Alloy is a titanium-stabilized fully austenitic Ni-Fe-Cr alloy with additions of Cu + Mo
•good resistance to stress-corrosion cracking
•satisfactory resistance to pitting and crevice corrosion
•good resistance to oxidizing and non-oxidizing hot acids
•good mechanical properties at both room and elevated temperatures, up to approximately 550 ℃
•approval for pressure vessels with wall temperatures up to 450 ℃

Density: 8.14
Corrosion resistance

Incoloy 825 Alloy is a versatile general engineering alloy with resistance to corrosion in acids and alkalis under both oxidizing and reducing conditions. High nickel content gives the alloy virtual immunity to stress corrosion cracking.
Incoloy 825 Alloy is good in media as diverse as sulphuric, sulphurous, phosphoric, nitric and organic acids, alkalis such as sodium or potassium hydroxide, and acidic chloride solutions.
The versatility of Alloy 825 is illustrated by its use in nuclear fuel element dissolvers where a variety of corrosive media, e. g. sulphuric and nitric acids and sodium hydroxide, are handled in the same equipment.

Applications of Incoloy 825:

Incoloy 825 Alloy is used in a wide variety of applications up to a temperature of approximately 550 ℃.
Typical applications are:
•components such as heating coils, tanks, crates, baskets and chains in sulphuric acid pickling plants
•fuel element dissolvers
•sea-water-cooled heat exchangers, offshore product piping systems; tubes and components in sour gas service.
•heat exchangers, evaporators, scrubbers, dip pipes etc. in phosphoric acid production
•air-cooled heat exchangers in petroleum refineries
•food processing
•chemical plant
•combustion-resistant alloy for high pressure O2 applications

Chemical composition

 Ni  Cr  Fe  C  Mn  Si  Cu  Mo  Al  Ti  P S
 min(%)  38.0  19.5  bal.  1.5  2.5
 max(%)  46.0  23.5  0.05  1.0  0.5  3.0  3.5  0.2  1.2  0.03 0.03

Mechanical properties

 Condition  Yield Strength(Mpa)  Tensile Strength(Mpa)  Elongation(%)  Hardness(HB)
 ASTM Min Value  Soft Annealed  241  586  30
 Typical Values at RT  Soft Annealed  333  647  33 160

International Specification Comparison chart

 Material  Round Bar  Plate  Pipe
 Seamless  Welded
 B425  B424  B423  B163/704/705
 ASTM Min Value  SB425  SB424  SB423  SB163
 JIS  NCF825  H4553  G4901  H4552
 DIN  2.4858  17752  17750  17751

Product: Sheet, Coil, Pipe, Bar, Wire and Forgings