UNS N08825 (Incoloy 825)

Short Introduction:

  • Incoloy 825/GB NS1402/UNS N08825/SEW VDIUV W.Nr.2.4858 NiCr21Mo/BS NA16/AFNOR

  • NC21FeDU is an all-purpose project alloy, have good corrosion resistance of the acid and alkali metal property in both oxidation and reduction environments. High nickel content made it with effective stress corrosion cracking resistance performance. Incoloy 825 have excellent corrosion resistance in different kinds of media, such as sulfuric acid, phosphoric acid, nitric acid and organic acid, alkali metal such as sodium hydroxide, potassium hydroxide, and hydrochloric acid. A variety of media corrosion of nuclear-burning dissolver show 825 high integrated prpperty, like sulfuric acid, nitric acid and potassium hydroxide are all dealing in a same device.

Category:

Description

Incoloy 825 /UNS N08825

Material grades and equivalents:

Incoloy 825/GB NS1402/UNS N08825/SEW VDIUV W.Nr.2.4858 NiCr21Mo/BS NA16/AFNOR NC21FeDU

 

Incoloy 825 Chemical composition:

%

Ni

Cr

Fe

C

Mn

Si

Cu

Mo

Al

Ti

P

S

Min.

38

19.5

rest

1.5

2.5

0.6

Max.

46

23.5

rest

0.05

1

0.5

3

3.5

0.2

1.2

0.02

0.03

 

Incoloy 825 Physical properties:

Density

8.1 g/cm³

Melting point

1370-1400°C

 

Incoloy 825 Alloy mi nimum mechanical properties in the room temperature:

 

Alloy state

Tensile strength Rm N/mm²

Yield strength R P0. 2N/mm²

Elongation A 5 %

Brinell hardness HB

Incoloy  825

550

220

30

≤200

 

Characteristic as below:

  1. Good stress corrosion cracking resistance performance

  2. Good resistance for pitting and crevice corrosion performance

  3. Good anti-oxidation and non-oxidzing heat acid performance

  4. Good mechanical performance in both room temperature and up to 550°C

  5. Have the pressure vessel authenticate when manufacture temperature up to 450°C

Incoloy 825 Metallurgical structure:

Inoloy 825 is the face-centered cubic lattice structure.

Incoloy 825 Corrosion resistance:

Incoloy 825 is an all-purpose project alloy, have good corrosion resistance of the acid and alkali metal property in both oxidation and reduction environments. High nickel content made it with effective stress corrosion cracking resistance performance. Incoloy 825 have excellent corrosion resistance in different kinds of media, such as sulfuric acid, phosphoric acid, nitric acid and organic acid, alkali metal such as sodium hydroxide, potassium hydroxide, and hydrochloric acid. A variety of media corrosion of nuclear-burning dissolver show Inoloy 825 high integrated prpperty, like sulfuric acid, nitric acid and potassium hydroxide are all dealing in a same device.

Incoloy 825 Application field:

Incoloy 825 widely use in many kinds of industry field that the working temperature no more than 550°C.

Incoloy 825 Typical application field:

  1. Sulfuric acid factory usage for heating pipe, container, basket, chain and so

  2. Cooling heat exchanger, marine product pipeline system and gas pipeline of acidic environment.

  3. Heat exchanger, steam machine, washing, impregnation pipe, etc. for phosphoric acid produce

  4. Oil refining in the air heat exchanger

  5. Food project

  6. Chemical process

  7. Application of high pressure oxygen flam-retardant alloy

Specifications:

 

Rod, Bar, Wire and Forging Stock

BS 3076NA16;ASTM B 425;ASTM B 564;ASME SB 425;ASME SB 564;ASME Code Case N-572;DIN 17752;DIN 17753;DIN 17754;VdTÜV 432;ISO 9723;ISO 9724;ISO 9725

 

Plate, Sheet and Strip

BS 3072NA16;BS 3073NA16;ASTM B 424;ASTM B 906;ASME SB 424;ASME SB 906;DIN 17750;VdTÜV 432;ISO 6208

 

 

 

Pipe & Tube

BS 3074NA16;ASTM B 163;ASTM B 423;ASTM B 704;ASTM B 705;ASTM B 751;ASTM B 775;ASTM B 829;ASME SB 163;ASME SB 423;ASME SB 704;ASME SB

705;ASME SB 751;ASME SB 775;ASME SB 829;ASME Code Case 1936;DIN

17751;VdTÜV 432 ISO 6207