Duplex Stainless Steel Suppliers

Key points when considering the use of Duplex Stainless Steels

Due to advances in controlling the nitrogen content for steel making techniques during the last three decades, duplex stainless steels have become much more popular. Here are four key advantages you may gain by using them:

  • Strength – their higher strength (twice the design strength of either austenitic or ferritic) leads to valuable weight saving.
  • Corrosion Resistance – offering a wide range of resistance to match the chosen application, and particularly resistant to pitting, crevice, and stress corrosion cracking. They have proven to be useful in areas such as hot water or brewing tanks, swimming pools and process plant.
  • Toughness – down to a range of minus 50-80C (but not genuine cryogenic applications) they tend to perform much better than ferritics
  • Weldability – compared to standard austenitics, they are shown to be much more weldable in thick sections.

There are other considerations to take into account when making your choice. They are more difficult to form and machine than austenitics. So, duplex stainless steel should not be your choice for applications requiring a high level of formability. They are also restricted to a maximum temperature of 300°C. If you have any questions, please contact us so that we can carefully assess your specific requirements.


Their extra strength and improved corrosion resistance comes from a mixed microstructure of austenite and ferrite – usually in a 50/50, but occasionally a 60/40 ratio. They tend to have higher chromium and molybdenum and lower nickel contents than austenitic stainless steel.


As the properties of duplex stainless steel are achieved with a lower alloy content than other grades, this makes their use more cost-effective for many different applications. You can use specific products based on their alloy content and corrosion resistance.


2205 Duplex – consisting of approximately 40-50% ferrite in an annealed condition, this product is seen as providing a practical solution to the chloride stress corrosion cracking problems often found when using other grades of stainless steel – for more details click here.

ZERON® 100 – this alloy was created to provide corrosion resistant material for pumps used in the harsh environments of the North Sea. An outstanding performer, it is now being used in many industries and in a wide range of forms – for more details click here.


We always want to ensure that you have the best product for any application. So, whatever your requirements, please email or telephone us now so that we can discuss the specific details with you.

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