Chemical composition of Incoloy 825:
alloy
%
nickel
chromium
iron
carbon
manganese
silicon
copper
molybdenum
aluminum
titanium
phosphorus
sulfur
Eight hundred and twenty-five
Minimum
Thirty-eight
Nineteen point five
allowance
One point five
Two point five
Zero point six
Maximum
Forty-six
Twenty-three point five
Zero Point Zero Five
One
Zero point five
Three
Three point five
Zero point two
One point two
Zero point zero two
Zero point zero three
Physical properties of Incoloy 825:
density
8.1 g/cm3
melting point
1370-1400 C
The minimum value of the mechanical properties of Incoloy 825 alloy at room temperature:
Alloys and states
Tensile strength N/mm2 Rm
Yield strength RP0.2N/mm2
Extension rate A5%
Hardness HB
Eight hundred and twenty-five
Five hundred and fifty
Two hundred and twenty
Thirty
Less than or equal to 200
This alloy has the following characteristics:
1 good resistance to stress corrosion cracking performance
2 good corrosion resistance and crevice corrosion resistance.
3 very good oxidation resistance and non oxidation heat acid properties
4 with good mechanical properties at room temperature and at high temperature of up to 550
5 the certification of pressure vessels with a temperature of 450 degrees Celsius
Metallographic structure of Incoloy 825:
825 for face centered cubic lattice structure.
Corrosion resistance of Incoloy 825:
825 alloy is a kind of general engineering alloy, oxidation and reduction environment has the properties of acid and alkali corrosion of high nickel alloy has effective ingredients resistance to stress corrosion cracking resistance. The corrosion resistance in a variety of media are good, such as sulfuric acid, phosphoric acid, nitric acid and organic acid, alkali metals such as sodium hydroxide, potassium hydroxide and hydrochloric acid solution. 825 the comprehensive performance of the alloy is shown in a variety of corrosive medium, such as sulfuric acid, nitric acid and sodium hydroxide in the same equipment.
Incoloy 825 applications in the field of application:
825 alloys are widely used in various industrial areas with a temperature of no more than 550.
The typical application of Incoloy 825 is:
Heating pipe, container, basket and chain for 1 sulfuric acid pickling plant.
2 seawater cooling heat exchangers, marine products pipeline systems, acid gas environment piping.
3 phosphoric acid production in the heat exchanger, evaporator, washing, dipping tube, etc..
4 air heat exchangers in petroleum refining
5 Food Engineering
6 chemical process
7 high pressure oxygen application of flame retardant