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Inconel 825

Incoloy 825 austenitic nickel ferrochrome alloy
The alloy is a kind of general engineering alloy, which has high nickel composition of acid resistance and alkali metal corrosion resistance in oxidation and reduction environment. corrosion resistance is good in various media, such as sulfuric acid, phosphoric acid, nitric acid and organic acids, alkali metals such as sodium hydroxide, potassium hydroxide and hydrochloric acid solutions. Applied to various industrial fields with temperatures not exceeding 550℃, such as: heating pipes, containers, baskets and chains used in sulphuric acid pickling plants, seawater cooling heat exchangers, marine product piping systems, acid gas environmental pipelines, heat exchangers in phosphoric acid production, evaporators, washing, impregnation tubes, air heat exchangers in petroleum refining, food engineering, chemical processes, flame retardant alloys for high pressure oxygen applications, etc.
Inconel 825 common number corresponding

Category

General name

Number of German marks

Unified Digital Number Number Number

Cast plate

Ni-Cr-Fe

Incoloy 825NiCr21Mo

2.4858

N08825

CU5MCuC



Inconel 825 other brands corresponding

Name

GB of China

ASTM of the United States

 DIN Germany

British BS

AFNOR France

New brand

Old brand

Incoloy 825

NS1402

NS142

UNS N08825

W.Nr.2.4858(NiCr21Mo)

NA16

NC21FeDu



Inconel 825 physical properties:

 Density

 Melting point

 Thermal conductivity

 Specific heat capacity

 Elastic modulus

 Shear modulus

 resistivity

Poisson's ratio

 Line expansion coefficient

g/cm3

λ/(W/m•℃)

J/kg•℃

GPa

GPa

μΩ•m

a/10-6℃-1

8.25

1395

14.7(100℃)

430

214

...

1.22

...

13.1(20~100℃)



Inconel 825 chemical composition

Licence

UNS No.

Chemical element%

C

Mn

Si

P

S

Cu

Mo

Ni

Cr

Ksi[Mpa] of minimum tensile strength

Minimum yield strength Ksi[Mpa]

Minimum elongation,% gauge 2 inches

CU5MuC

N08826

Max

0.050

1.0

1.0

0.03

0.03

1.50-3.5

2.5-3.5

38.0-44.0

19.5-23.5

75[520]

35[240]

20



Inconel 825 corrosion properties

Medium

Inconel825 the nickel content in the alloy is much higher than that of stainless steel, the corrosion resistance of alkali sulfide is better than that of stainless steel, and the corrosion resistance of high temperature is better. The corrosion resistance of Ni-Fe alloy is better than that of Ni in oxidizing environment. Because of the high nickel content, it also has good corrosion resistance in reducing environment.