Alloy 2201 Duplex Stainless Steel Chemical Composition Properties, Grades, Charts and Online Pdf

Duplex stainless steel Alloy 2205, which has a reputation for extraordinary corrosion resistance and mechanical features, is a good choice for many industry applications. The chemical composition that consist of approximately 22% chromium, 5% nickel, and 3% molybdenum makes it inimitable in strength and durability even in harsh environments. This grade exhibits superior resistance to chloride stress corrosion cracking and pitting than other known grades, thereby making it a preferred option for the marine and chemical processing industries. This success of Alloy 2201 micro structure was as a balanced makeup of austenitic and ferritic substructures with good weld-ability and toughness delivered. Charts and online resources offer comprehensive information on the same determining the fitness of the material for projects ranging from engineering to manufacturing by providing numerous properties, grades and specifications.

Alloy 2201 Duplex Stainless Steel Chemical Composition And Grade Table

2201 Alloy Duplex steel composed by the combination of austenitic and ferritic phases possesses better resistance in the corrosion and toughness. This alloy has an impressive ability to resist different types of corrosive agents such as chloride-bearing media, thanks to balanced proportions of chromium, molybdenum, and nickel. Its grading table usually has specifications labeled as ASTM A240 and ASTM A276 that identify its use in sectors like chemical processing, marine applications and oil and gas extraction. Such alloy's composition table highlights the extraordinary durability and performance under intense conditions of application that it ranks to be top of its league choice for critical engineering works.

Alloy 2201 Duplex Stainless Steel
Elements Fe Cr Mn Ni Mo N C
Min (%) - - - - - - -
Max (%) 71.45 21.45 5 1.5 0.3 0.220 0.03

Advantages and Disadvantages of Alloy 2201 Duplex Stainless Steel


  • High Strength: It is stronger than austenitic or ferritic stainless steel materials offer.

  • Improved Corrosion Resistance: Offers improved chemical resistance compared to the conventional grades of austenitic stainless steels.

  • Good Weldability: Has a good weldability and it can go through welding in tandem with current processes.

  • Cost-Effective: Typically, the material is more economical and less expensive than certain high nickel alloys.


  • Limited Availability: Some forms may not be as easily accessed as other standard types of stainless steel materials.

  • Sensitivity to Chloride Stress Corrosion Cracking: Like other duplex stainless steels, it may also develop the tendency of chloride indicted stress corrosion cracking.

  • Fabrication Challenges: Has to be processed carefully because it accumulates its specific characteristics by virtue of its dual-phase microstructure.

  • Machining Difficulty: May be difficult to machine versus austenitic stainless steel.

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