UNS S32205 Duplex Stainless Steel

Duplex stainless is a mixed microstructure of austenite and ferrite (50/50) which has improved strength over ferritic and austenitic steel grades with similar corrosion resistance qualities.

One of the main attractions of duplex stainless steel is cost – due to the materials increased yield strength it is often possible to reduce the thickness of material making it much cheaper than a comparative austenitic stainless steel grade.

Also Duplex steel has a lower alloy content reduces production costs. Certainly cost and weight savings without loss of performance is an attractive proposition to purchasers.

Benefits of using UNS32205 Duplex Stainless Steel

  • Corrosion resistance much better than that of Type 316
  • Greater tensile and yield strength
  • Good ductility and toughness though not as good as austenitic grades
  • Good stress corrosion cracking resistance (SSC)
  • Opportunity for purchases to reduce their material costs without compromising on quality

Mechanical Properties of S32205

Description Duplex 2205
Proof Stress 0.2% (MPa) 450
Tensile strength (MPa) 620
Elongation A5 (%) 20
Hardness HB: 293
HRB: 96 (according to Rockwell C Scale)

Chemical Composition of S32205

UNS No S32205
EN 1.4462
AISI 2205
Carbon (C) 0.030
Silicon (Si) 1.00
Manganese (Mn) 2.00
Phosphorus (P) 0.030
Sulphur (S) 0.020
Chromium (Cr) 22.0/23.0
Molybdenum (Mo) 3.0/3.5
Nickel (Ni) 4.5/6.5
Nitrogen (N) 0.14/0.20