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Incoloy 825 UNS N08825 2.4858 Nickel-base Alloy

Incoloy 825 UNS N08825 2.4858 Nickel-base Alloy

Incoloy 825 UNS N08825 2.4858 Nickel-base Alloy

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Incoloy 825 UNS N08825 2.4858 Nickel-base Alloy


Chemical Composition



Ni Cr Fe C Mn Si Cu Mo Al Ti P S
Min 38.0 19.5



1.5 2.5
0.6

Max 46.0
 23.5 Bal 0.05 1.0 0.5 3.0 3.5 0.2 1.2 0.02 0.03


Physical properties



Tensile strength
Rm N/mm²
 Yiield Strength (0.2％ offset)
Rp0.2N/mm²
 Elongation
A5 ％
 Density
 Briell Hardness
HB
 Melting point
(℃)
500 210 30 8.1g/cm³
 ≤200
 1370-1400


Executive Standard


Bar Medium Sheet
 Seamless Tube Welded pipe Flange fastener
ASTM B425 ASTM B409 ASTM B407
 ASTM B515 ASTM B425

Features


1, Good resistance to stress corrosion cracking
2, Good resistance to pitting and crevice corrosion
3, Very good oxidation resistance and non-oxidative thermal acid properties
4, Excellent mechanical properties at room temperature and high temperatures up to 550 ° C
5, Certification for pressure vessels with a manufacturing temperature of 450 ° C


Metallographic Structure


Monel 400 is a High strength single phase solid solution

Corrosion Resistance


825 alloy is a general-purpose engineering alloy with high resistance to acid and alkali metal corrosion in both oxidizing and reducing environments. Nickel composition makes the alloy effective against stress corrosion cracking. Corrosion resistance is good in various media such as sulfuric acid, phosphoric acid, nitric acid and organic acids, alkali metal such as sodium hydroxide, potassium hydroxide and hydrochloric acid. The higher overall performance of Alloy 825 is manifested in a variety of nuclear combustion dissolvers with corrosive media, such as sulfuric acid, nitric acid and sodium hydroxide.


Applications


825 alloy is widely used in various industrial fields where the temperature is not more than 550 °C.

1, Heating pipes, containers, baskets and chains for sulfuric acid pickling plants                               
2, Seawater cooling heat exchanger, marine product piping system, acid gas environment pipeline                                                          
3, Heat exchanger, evaporator, washing, dip tube, etc. in phosphoric acid production                                     
4, Air heat exchanger in petroleum refining                                              
5, Food engineering                                               
6, Chemical process

7, Flame retardant alloy for high pressure oxygen applications