Duplex 2205

Description

With exceptionally high amounts of molybdenum and chromium, Avesta Sheffield 2205, or Duplex 2205, offers strength, improved pitting and consistent stress corrosion cracking resistance. 2205 integrates the best features of austenitic and ferritic steels (as well as nearly equal amounts of austenite and ferrite) and can be welded with common stainless steel welding techniques – its uniform composition minimizes localized corrosion.

Design features

  • Strength
  • Exceptional uniform corrosion resistance
  • Better heat conductivity and lower thermal expansion than austenitic steels
  • Resistance to:
    • Stress corrosion cracking
    • Erosion
    • Corrosion fatigue
    • Pitting
    • Crevice corrosion
    • Sulfide stress corrosion cracking

Applications

  • Petrochemical – tubes, pipes and heat exchangers
  • Desalination plants – pipes and heat exchangers
  • Chemical processing and transportation (including chemical tankers) – tanks, pipes, pressure vessels, heat exchangers, welding consumables
  • Chloride-handling industries – pipes, pressure vessels and tanks
  • Rotors
  • Shafts
  • Fans
  • Press rolls
Product Type Size Range Wall/Pressure Class
Seamless Pipe 1/2” through 8” 10S, 40S (Std.), 80S (XH), 160
Welded Pipe 8” through 16” 10S, 40S
Butt Weld Fittings 1/2” through 16” 10S, 40S (Std.), 80S (XH)
Pressure Fittings 1/2” through 2” 3000
Flanges 1/2” through 16” 150, 300

Duplex 2205 Chemical Composition %

C Cr Fe Mn Mo N Ni P S Si
MAX     MAX       MAX MAX MAX
0.030 21.0-23.0 BAL 2.0 2.5-3.50 0.08-0.20 4.50-6.50 0.03 0.02 1.0

 

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