Duplex 2205 - UNS S31803

High chloride stress corrosion resistance at high strength, superior to 304/316 grades in corrosion performance, excellent notch toughness.

 

Duplex 2205 Specification/Condition

  • ASTM A484/ NACE MR0175

Duplex 2205 applications

  • chemical process vessels
  • pipe
  • scrubber systems
  • heat exchangers

Duplex 2205 technical data

  • UTS (KSI): 109 Min (125 ksi Min)
  • Yield 0.2% Offset (KSI): 80 ksi Min (110 ksi Min)
  • EL (% Min): 30% (12%)
  • RA (% Min): 50% ((33%)
  • Hardness (HRC): 28 HRC (36 HRC)
  • Charpy Impact Min. ft-lbs: 20 ft-lbs.

Duplex 2205 dimensions

  • 0.5 – 6.5 in

Duplex 2205 Chemical composition (Wt %)

 

Carbon
(C)
Manganes
(Mn)
Phosphorus
(P)
Sulfur
(S)
Silicon
(Si)
Nickel
(Ni)
Cobalt
(Co)
0.03 Max 2.0 Max 0.03 Max 0.02 Max 1.0 Max 4.5-6.5

 

Chromium
(Cr)
Manganese
(Mo)
Niobium + Tantalum
(Nb (Cb) + Ta)
Titanium
(Ti)
Copper
(Cu)
Aluminum
(Al)
Iron (Fe) & Others
21.0-23.0 3.0-3.5 Fe– Balance, Nitrogen– 0.14– 0.2

 

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