duplex stainless steel

Duplex Stainless Steel: Passing Rigid Steel Standards

Duplex stainless steel gains great popularity with its excellent features and low cost – making more possible advancements in steel crafting.

Duplex stainless steel has originated in 1920s due to the existent pursuit of making advances in steelmaking techniques with respect to the nitrogen control.

duplex stainless steelThough stainless steel is classified into two different types such as the austenite and ferrite, metalworkers still see important technical weaknesses in both types.

Particularly, both of these types are easy to make and fabricate but they still do lacking features that led to more advancements in engineering high class of steels.


  • Has low strength and low resistance to stress corrosion cracking


  • Has poor weldability in thick sections, low strength, and poor low temperature toughness

Due to lack features in both, duplex stainless steel comes in the way. Duplex stainless steels are becoming popular in the manufacturing field and have been distributed and offered by major steel mills for their excellent features:

  • Greater corrosion resistance
  • Resistance to stress corrosion cracking
  • High Strength
  • Good price stability
  • Low cost

Duplex stainless steels consist of two mixed microstructures grains which are the austenite and ferrite. The combined forces of two makes duplex have strength that are roughly twice as strong as compared to regular austenitic and ferritic steels. They also have improved resistance against localized corrosion, crevice cracking, pitting, and stress corrosion cracking which makes it ideal for a wide range of high temperature applications.

Duplex stainless steels have a high amount of chromium and molybdenum but have lower amount of nickel contents. Thus, compared to ordinary stainless steel, duplex stainless steels are lighter in weight and lower in cost – such feature that is most sought by metalworkers in their manufacturing pursuits.

The excellent mechanical and physical properties of duplex stainless steels are achieved with lower alloying elements found in its content, allowing their use to be used cost-effective for a variety of applications.

All of those sum up why duplex stainless steel earns the increasingly growing demand in the market. Most of the manufacturers have preferred it for almost all types of applications including construction and manufacturing. Aside from the high strength, manufacturers see the great convenience in the big cost savings they got from using such materials.

Duplex stainless steels are sure to be perfect in almost all types of application knowing they possess both exceptional properties found in austenite and ferrite.

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