ASTM A240/240M UNS S32205 Duplex Stainless Steel Plate Thickness 3.0 - 16.0mm Custom Cutting SS Plate

Specification of our 2205 duplex stainless steel plate

Alloy 2205 duplex stainless steel is an alloy developed from the initial Super Duplex Stainless Steel. It is supplied in the solution annealed condition.

As a form of duplex stainless steel, alloy 2205 was designed as comprising 22% chromium, 3% molybdenum, and 5-6% nickel nitrogen. Alloy 2205 combines the desirable aspect of properties of both austenitic and ferritic grades. The high chromium, molybdenum and nitrogen mixture results in a Pitting Resistance Equivalent number (PREN) of 33-34, providing pitting and crevice corrosion resistance superior to Alloy 316L or Alloy 317L austenitic stainless steels in almost all corrosive media.

As a result of its excellent corrosion properties, it is well-suited to environments containing chlorides and hydrogen sulphide, for use in oil and gas extraction from sour wells, in refineries and in process solutions contaminated with chlorides.

It also has good erosion fatigue properties as well as lower thermal expansion and higher thermal conductivity than austenitic steels. The yield strength is about twice that of austenitic stainless steels, allowing a designer to save weight and make the alloy more cost-competitive when compared to Alloy 316L or Alloy 317L.

Composition ranges for 2205 grade stainless steels

Mechanical properties of 2205 grade stainless steels

Grade specification comparisons for 2205 grade stainless steels

Features of Duplex 2205 Stainless Steel

• 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

Applications of duplex 2205 stainless Plate

• 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

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