Incoloy825 (N08825) nickel alloy steel

Incoloy 825 steel is a titanium stabilized fully austenitic nickel iron chromium alloy with added copper and molybdenum. Incoloy 825 nickel alloy steel is a general-purpose engineering alloy that resists acid and alkali metal corrosion in both oxidizing and reducing environments.

Alloy Overview
The high nickel content gives the alloy effective resistance to stress corrosion cracking. It has good corrosion resistance 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 solution. The higher comprehensive performance of Incoloy 825 nickel alloy steel is demonstrated in nuclear combustion dissolvers with diverse corrosive media, such as sulfuric acid, nitric acid and sodium hydroxide, all processed in the same equipment.

Similar grades
UNS N08825 (USA)
NiFe30Cr21Mo3 (ISO)

Chemical composition of Incoloy825 (N08825) nickel alloy steel:
Nickel: 38-46
Chromium Cr: 19.5-23.5
Iron: balance
Carbon C: ≤0.025
ManganeseMn: ≤1.0
Silicon Si: ≤0.5
Molybdenum: 2.5-3.5
Copper Cu: 1.5-3.0
Cobalt Co: ≤1.0
Aluminum Al: ≤0.2
Titanium Ti: 0.6-1.2

Alloy Properties
●Good resistance to stress corrosion cracking
●Good resistance to pitting corrosion and crevice corrosion
●Very good antioxidant and non-oxidizing hot acid properties
●Excellent mechanical properties at room temperature and high temperatures up to 550℃
●Certification for pressure vessels with manufacturing temperatures up to 450℃

Application field
Incoloy 825 (N08825) nickel alloy steel is widely used in various industrial fields where the operating temperature does not exceed 550℃.

Typical applications of Incoloy825 (N08825) nickel alloy steel are:
●Heating tubes, containers, baskets and chains used in sulfuric acid pickling factories.
●Seawater cooling heat exchangers, marine product pipeline systems, acid gas environment pipelines.
●Heat exchangers, evaporators, washers, dipping tubes, etc. in phosphoric acid production.
●Air heat exchanger in petroleum refining
●Food Engineering
●Chemical process
●Flame-retardant alloys for pressurized oxygen applications