1.4462 (S32205) F51

A duplex austenitic-ferritic chromium-nickel-molybdenum stainless steel.

Duplex stainless steels are extremely corrosion resistant, work hardenable alloys. Their microstructures consist of a mixture of austenite and ferrite phases. As a result, duplex stainless steels display properties characteristic of both austenitic and ferritic stainless steels. This combination of properties can mean some compromise when compared with pure austenitic and pure ferritic grades.

Duplex stainless steels are in most cases, tougher than ferritic stainless steels. Strengths of duplex stainless steels can in some cases be double that for austenitic stainless steels.
Whilst duplex stainless steels are considered resistant to stress corrosion cracking, they are not as resistant to this form of attack as ferritic stainless steels. However, the corrosion resistance of the least resistant duplex stainless steels is greater than that for the most commonly used grades of stainless steels, i.e. 304 and 316.

Duplex steels are also magnetic, a property that can be used to easily differentiate them from common austenitic grades of stainless.

Property data given in this document is typical for bar products covered by EN standards. ASTM, EN or other standards may cover products sold. It is reasonable to expect specifications in these standards to be similar but not necessarily identical to those given in this datasheet.

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Range

Product FormImperial SizesMetric Sizes
Round Bar Peeled K124"100mm
If you do not see what you are looking for, please contact your local service centre with your specific requirements.

Related Specifications

Grade 1.4462/2205 is similar to but may not be a direct equivalent:

  • UNS S31803
  • UNS S32205
  • BS 318S13

Properties

Chemical Composition

Applications

  • Process industry components in sulphuric acid, nitric acid, phosphoric acid, ethylene oxide, polypropylene & PVC production
  • Equipment handling organic & fatty acids, chemical storage, tankers, heat exchangers
  • Marine industry and shipbuilding propellers, shafts, rudders, shaft seals, pumps, bolts, fasteners, valves, instrumentation
  • Oil and chemical tankers
  • Oil & Gas industry pumps, valves, pipe, vessels, wellhead equipment, subsea equipment, separators, heat exchangers
  • Pollution control systems, effluent scrubbing, flue gas desulphurisation (FGD)
  • Waste water treatment, sour water purification
  • Pulp & paper industry applications such as pulp liquor heaters, bleach tower linings, digesters, brownstock washers
  • Food industry applications including brewery piping, evaporators, hot liquor tanks, presses

Characteristics

  • Higher strength than standard stainless steels
  • Higher corrosion resistance than Alloy 316L stainless steel in a wide variety of corrosive chemicals including sulphuric, phosphoric and nitric acids
  • Good resistance to pitting and crevice corrosion in seawater
  • High stress corrosion resistance
  • Lower thermal expansion than austenitic stainless steels
  • Higher thermal conductivity than austenitic stainless steels

Additional Information

Fabrication

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