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DUPLEX 2205

While regular steel contains a small amount of chromium to improve its strength and hardness, stainless steel alloys exhibit superior corrosion resistance due to their ability to form a passivation layer of chromium oxide on their outer surface, effectively coating the steel and protecting it from harmful oxidation that occurs between exposed iron and oxygen molecules in the atmosphere. Apex Metal India is a leading supplier and stockiest of Stainless Steel in all grades.

Duplex 2205 is a two-phase, ferritic, austenitic 22% chromium, 3% molybdenum, 5 to 6% nickel alloyed stainless steel. It is the most widely used duplex stainless steel grade and is characterized by high yield strength, double that of the standard austenitic stainless steel grades. It also demonstrates good fatigue strength, as well as outstanding resistance to stress corrosion cracking, crevice, pitting, erosion, and general corrosion in severe environments.
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Chemical Analysis :
Weight% (all values are maximum unless arange is otherwise indicated)


C Mn Si P S Cr Mo Ni N
2205
(S31803)
0.03
max
2.0
max
1.00
max
0.03
max
0.02
max
min: 21.0
max: 23.0
min: 2.5
max: 3.5
min: 4.5
max: 6.5
min: 0.08
max: 0.20
2205(S32205) 0.03
max
2.0
max
1.0
max
0.03
max
0.02
max
min: 22.0
max: 23.0
min: 3.0
max: 3.5
min: 4.5
max: 6.5
min: 0.14
max: 0.20


Mechanical Properties :


Grade Tensile Strength ksi (min) Yield Strength 0.2% ksi (min) Elongation % Hardness( HB ) Max(
2205 90 65 25 217





APPLICATION :

  • Chemical processing, transport and storage – pressure vessels, tanks, piping, and heat exchangers
  • Oil and gas exploration and processing equipment – piping, tubing, and heat exchangers
  • Marine and other high chloride environments
  • Effluent scrubbing systems
  • Pulp and paper industry – digesters, bleaching equipment, and stock-handling systems
  • Cargo tanks for ships and trucks
  • Food processing equipment
  • Biofuels plants
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