The alloy is a common engineering alloy that is resistant to acid and alkali metal corrosion in both oxidizing and reducing environments, and its high nickel content makes the alloy effective against stress corrosion cracking. It has good corrosion resistance in various media such as sulfuric acid, phosphoric acid, nitric acid and organic acids, as well as alkali metals such as sodium hydroxide, potassium hydroxide and hydrochloric acid solution. The overall properties of the alloy can be seen in a nuclear combustion dissolver with various corrosive media, such as sulfuric acid, nitric acid and sodium hydroxide. All processed on the same device. It is used in various industrial fields, such as heating pipes, containers, baskets and chains, seawater cooling heat exchangers, aquatic product piping systems, acid gas environment piping, phosphoric acid, etc., for sulfuric acid pickling plants, and the working temperature does not exceed 550. Air heat exchanger for acid heat exchanger, evaporator, cleaning, immersion tube, etc., petroleum refining, food engineering, chemical process, flame retardant alloy for high-pressure oxygen, etc.
N08825 Application Area Overview:
N08825 alloy is widely used in chemical, marine engineering, pharmaceutical, food processing and other fields, and has shown good performance in the following applications:
1.Chemical industry: N08825 alloy is widely used in storage and transportation equipment, manufacturing equipment and chemical reactors of strong acid media such as sulfuric acid, phosphoric acid, nitric acid, hydrochloric acid, etc.
2.Offshore engineering: N08825 alloy has seawater corrosion resistance, and is often used in marine engineering, offshore oil extraction equipment, marine ships and other fields.
3.Pharmaceutical industry: N08825 alloy is used in the manufacture of medical equipment and packaging materials because of its good corrosion resistance and stability to drugs.
4.Food processing: N08825 alloy is widely used in food processing equipment, such as food storage tanks, food heat transfer equipment, etc.
5.Other fields: N08825 alloy is also used in nuclear industry, petrochemical industry, sewage treatment and other fields to meet the requirements of corrosion resistance and high temperature resistance.
Key features:
Good resistance to stress corrosion cracking, good resistance to pitting corrosion and crevice corrosion.
Very good resistance to oxidation and non-oxidizing hot acids.
It has very good mechanical properties at room temperature and high temperatures up to 550°C.
Certified to manufacture pressure vessels up to 450 degrees Celsius.
Corrosion resistance
Alloy 825 is a general-purpose engineering nickel alloy with high resistance to acid and alkali metal corrosion in oxidation and reduction environments, and the nickel composition makes the alloy have 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 corrosion, potassium hydroxide and hydrochloric acid corrosion solutions.
Alloy 825 is resistant to boiling sulfuric acid up to 40 and all concentrations of sulfuric acid at a concentration of 60 °C and 66 °C. For different concentrations of phosphoric acid, 825 has very good corrosion resistance.
It has good corrosion resistance to chloride-containing solutions, pitting in seawater, and stress corrosion. In addition, it also has good corrosion resistance to intergranular corrosion.
The high comprehensive properties of Alloy 825 are reflected in the nuclear combustion dissolver with a variety of corrosive media, such as sulfuric acid, nitric acid and sodium hydroxide, all processed in the same equipment.
Features;
Corrosion resistance: Stellite 21 alloy exhibits good corrosion resistance and can resist corrosion by corrosive media such as acids, alkalis, and salt water. This makes Stellite 21 widely used in the chemical, oil and gas sectors.
High temperature stability: Stellite 21 alloy can maintain its strength and stability in a high-temperature environment, and has good high-temperature performance. It is suitable for aerospace, energy, high-temperature technology and other applications that require high temperature and wear resistance.
Corrosion resistance: Tungsten chromium-cobalt alloy 21 exhibits excellent corrosion resistance and can resist a variety of corrosive media, including acids, alkalis, and salt water.
Oxidation resistance: Stellite 21 alloy resists the effects of oxidation and hot corrosion at high temperatures, maintaining its performance and stability.
Magnetic: Tungsten chromium-cobalt alloy 21 is generally non-magnetic and has low permeability.
Stellite 21 alloy has good weldability and can be joined with other metal materials, increasing the flexibility and versatility of its application.