Duplex stainless steel properties

  • Duplex steel is a kind of stainless steel composed of ferrite and austenite
  • Duplex stainless steel properties were analyzed from various tests

Mechanical Properties

The duplex stainless steel mechanical properties depending on the product form and final heat treatment. The specified limits are listed in the table below

BrandTest temperature ℃RP 0.2N/mm2RM 0.2N/mm2A 5%
SAF 2205 Duplex stainless steelroom temperature45062025
100360  
150335  
200310  
250295  
300285  
SAF 2507
Duplex stainless steel
550800100046
100450  
200400  

Corrosion resistance of duplex stainless steel and super duplex steel is similar to that of austenitic stainless steel. When the duplex steel is subjected to a high temperature above 300 ℃ for a long time, its internal structure will change and its toughness will decrease. 

However, the decrease of toughness does not necessarily affect the properties of the material at the working temperature.In the temperature range of – 50 ℃ – 280 ℃, the duplex stainless steel has good mechanical properties.

In the industry, it is well known that the corrosion resistance grade is expressed according to the corrosion resistance equivalent value PREN.

Duplex Stainless Steel

Physical Properties

The thermal conductivity of duplex stainless steel is listed in the table below and compared with 316L stainless steel.

Thermal conductivity – W / M

temperature

Brand

SAF2205

SAF2507

AISI316L

20

19

16

15

100

19

17

16

200

21

19

17.5

300

23

20

19

Duplex steel is also one of the main products of our company. Committed to bring you the best quality steel pipes, welcome to contact us as soon.The thermal expansion force of duplex stainless steel is close to that of carbon steel. Compared with austenitic stainless steel, duplex stainless steel has obvious advantages.

Our duplex stainless steel grades

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