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The Use Of Duplex Stainless Steel
Time:2019-08-08 Source: Hits:

Dual phase stainless steel has both the advantages of ferritic stainless steel and austenitic stainless steel, it will austenitic stainless steel has excellent toughness and weldability and ferritic stainless steel has higher strength and resistance,        in view of its characteristics, it has a good corrosion in the environment. including 


●  Paper industry

The use of duplex stainless steel instead of 304 and 316 austenitic stainless steel sulphuric acid and sulphurous acid cooking pots improves the corrosion resistance 

and strength of the steamer, while reducing the wall thickness and reducing the total weight of the steamer.

 Duplex Stainless Steel


●  Chemical storage tank


The use of duplex stainless steel 2205 to store industrial wet-process phosphoric acid storage tanks is twice as strong as ordinary 316L and 317L stainless steel , reducing wall thickness.

In an industrial sulfuric acid environment, especially in the presence of chloride ions, 2205 is more resistant to localized corrosion than austenitic stainless steels.


 ●   Food and beverage industry:

Food and beverage industry production is typically processed in hot solutions containing chloride ions. Duplex stainless steel has unique advantages in stress corrosion cracking. 

Therefore, depending on the environment used, different duplex stainless steels can be used, but they also have an advantage over austenitic stainless steels in terms of total cost.


 ●    Ship transportation industry:


When used in the production of chemical tankers, it reduces the importance of the ship and reduces the fuel consumption. The most used is 22% chrome-type duplex stainless steel, 

which can meet the corrosion resistance of the materials required for the cargo.


 ●  Construction industry:

Offshore oil platforms require seawater resistant materials and duplex stainless steels are used to make explosion-proof walls.


  ●   Oil refining industry

Mainly used in atmospheric and vacuum distillation, catalytic cracking hydrodesulfurization and other devices

In addition, duplex stainless steels are increasingly used in the production of sour gas and oil, mainly for the production of pipe lining, onshore and offshore piping systems and heat exchangers.


In addition, duplex stainless steel has many uses, as follows:

● hydrometallurgy


● Organic acids and caustic medium


● pollution control equipment


● marine and coastal applications


● piping facilities in the brewery



● Buildings.

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