Duplex 2205

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Duplex 2205

Written by Super User Hits: 1317 Created on Monday, 09 June 2014 08:10
Inventory Spotlight: Duplex 2205
Type Seamless & Welded Pipe Butt Weld Fittings Flanges & Pressure Fittings
Sizes 1/4" thru 16" 1/2" thru 12" All descriptions
Schedules Sch 10, 40, 80, 160 & XXH Sch 10, 40, 80, 160, & XXH  
ASTM Standards
Bar Butt Weld Fittings Forgings Pipe, Welded & Seamless Tube, Welded Plate
A276, A479 A815 A182 A790 A789 A240
Minimum Physical Properties
Tensile Strength Yield Strength
90 KSI Min. 65 KSI Min.
Chemical Composition (wt%)
C Mn P S Si Ni Cr Fe Mo N
0.03 Max 2.00 Max 0.03 Max. 0.02 Max. 1.00 Max. 4.50 - 6.50 21.0 - 23.0 Balance 2.50 - 3.50 0.14 - 0.20

 

Properties

Duplex 2205 is a dual-phase stainless steel whose grain structure is about 45% ferritic and 55% austenitic, hence the name "duplex". With twice the mechanical strength and corrosion resistance of common austenitics, 2205 offers some advantages over 316L and 317L:

* Lower coefficient of thermal expansion and a higher thermal conductivity
* Resists chloride stress corrosion cracking
* Pitting and crevice corrosion resistance
* Excellent choice for high chloride environments
* Lower cost than high alloyed austenitics

Applications

Industries taking advantage of the lower cost and higher mechanical properties of 2205 include:

* Heat exchangers
* Marine construction
* Oil and gas industry
* Chemical processing

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