Alloy Grade UNS: CD3MN, 4A – Seawater Corrosion Resistance

  • Overview

    J92205 is a duplex stainless steel. It features excellent seawater corrosion resistance and has nearly twice the strength of common stainless steels. This alloy also goes by the name CD3MN. As an alloy it is one of the more commonly used duplex stainless steels.

  • Typical Uses

    Centrifuge and dewatering equipment, couplings, heat exchangers, offshore piping systems, paper rolls, pulp digesters, pump and valve components, pressure vessels.

  • MetalTek Grade

    MTEK 2205

Similar Specifications

Cast UNS: J92205

Wrought UNS: S31803

Wrought Grade: 2205

Cast Grade: CD3MN, 4A

Cast ASTM: A890, A995

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: 0.03

Chromium: 21.0-23.5

Manganese: 1.5

Iron: n/a

Copper: 1.0 MAX

Nickel: 4.5-6.5

Lead: n/a

Tin: n/a

Silicon: 1

Zinc: n/a

Other: Mo 2.5-3.5; N 0.10-0.30

Minimum Mechanical Properties

Tensile, ksi

0

Tensile, MPa

0

Yield, ksi

0

Yield, MPa

0

Elongation

0%

Heat Treatment: Solution Anneal

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Stainless steels owe their ability to resist corrosion primarily to the presence of a passive film on their surface. Chromium is chiefly responsible for formation of the passive film. Iron ceases to rust at approximately 12% chromium content and resistance to oxidizing corrosives increases rapidly with chromium content up to approximately 20%.
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