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2205 Duplex Stainless Steel Sheet & Plate

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2205 Duplex Stainless Steel Sheet & Plate (UNS S32205, 1.4462)

2205 Duplex Stainless Steel Sheet & Plate is a highly versatile material, known for its excellent combination of strength, corrosion resistance, and durability. As a duplex stainless steel, it offers a microstructure composed of approximately equal parts austenite and ferrite, making it stronger than traditional austenitic or ferritic steelsThis dual-phase structure ensures better mechanical properties and greater resistance to stress corrosion cracking. Widely used in industries like oil and gas, marine, chemical processing, and desalination, 2205 Duplex is ideal for environments where harsh conditions prevail.

 

Key Properties 2205 Duplex Sheet & Plate

  • Corrosion Resistance: Exceptional resistance to pitting, crevice corrosion, and chloride-induced stress corrosion cracking, especially in marine or chloride-rich environments.
  • Strength: Twice the yield strength of conventional austenitic stainless steels like 304 or 316, enabling reduced material thickness and cost savings.
  • Thermal Resistance: Maintains high strength and corrosion resistance at temperatures up to 300°C (572°F).
  • Durability: Good toughness, even at low temperatures, while maintaining ductility and weldability.

 

Technical Specifications

  • UNS: S32205
  • DIN: 1.4462

Available Thickness

3/16″1/4″5/16″3/8″1/2″5/8″3/4″7/8″1″1 1/8″1 1/4″1 3/8″1 1/2″
4.8mm6.3mm7.9mm9.5mm12.7mm15.9mm19mm22.2mm25.4mm28.6mm31.8mm34.9mm38.1mm
1 5/8″1 3/4″2″2 1/4″2 1/2″2 3/4″3″3 1/4″3 1/2″4″5″6″
41.3mm44.5mm50.8mm57.2mm63.5mm69.9mm76.2mm82.6mm88.9mm101.6mm127mm152.4mm
2205-duplex-stainless-steel-sheet-plate

Application

  • Automotive
  • Chemical and Pharmaceutical
  • Fertilizer
  • Food Processing and Handling
  • Manufacturing
  • Mining
  • Oil & Gas
  • Phosphate Mining

Standard

  • ASTM A240 / A240M
  • ASTM A276 / A276M
  • ASTM A312 / A312M
  • ISO 15510
  • EN 10088-2
  • IN 10204
  • HE G4304
  • HE G4305
  • ASME SA240 / SA240M

Duplex 2205 Stainless Steel Equivalent

CountryStandard NameEquivalent Grade
United StatesASTM A240UNS S32205
EuropeEN 10088-2X2CrNiMoN22-5-3
GermanyDIN1.4462
United KingdomBS3255S
FranceNFZ3CND22-5-3
ItalyUNI1.4462
JapanJISSUS 329J3L
ChinaGBS32205

Corrosion Resistance

  • General Corrosion: Duplex 2205 offers excellent resistance to general corrosion in a variety of environments, including acidic and alkaline conditions. Its balanced microstructure helps to maintain integrity and resist degradation over time.
  • Pitting and Crevice Corrosion: The alloy’s high chromium and molybdenum content provide significant resistance to pitting and crevice corrosion, especially in chloride-containing environments. This makes it suitable for applications where localized corrosion can be a concern.
  • Stress Corrosion Cracking (SCC): Duplex Steel 2205 is particularly effective against stress corrosion cracking, a common issue in austenitic stainless steels. Its ferritic phase helps to mitigate the risk of SCC, making it reliable in environments that stress materials.
  • Intergranular Corrosion: The alloy’s microstructure minimizes the risk of intergranular corrosion, a type of localized corrosion that occurs along the grain boundaries of the metal. This is particularly important in high-temperature applications.
  • Corrosion Fatigue: Duplex 2205 also exhibits good resistance to corrosion fatigue, which is the weakening of the material due to cyclic stress combined with a corrosive environment.

Duplex 2205 (1.4462) Chemical Composition

Element Composition (%)
Carbon (C) 0.03 max
Manganese (Mn) 2.0 max
Silicon (Si) 1.0 max
Chromium (Cr) 22.0 – 23.0
Nickel (Ni) 4.5 – 6.5
Molybdenum (Mo) 3.0 – 5.0
Nitrogen (N) 0.08 – 0.20
Phosphorus (P) 0.03 max
Sulfur (S) 0.02 max

Duplex 2205 (1.4462) Physical Properties

PropertyValue
Density7.8 g/cm³
Melting Point~1425-1500°C (2597-2732°F)
Young’s Modulus~200 GPa (29 x 10⁶ psi)
Poisson’s Ratio~0.3
Thermal Conductivity~15 W/m·K (8.7 BTU/hr·ft·°F)
Coefficient of Thermal Expansion~15 x 10⁻⁶/°C (8.3 x 10⁻⁶/°F)
Electrical Resistivity~0.74 µΩ·m

Duplex 2205 (1.4462) Mechanical Properties

Property Value
Tensile Strength 620 – 800 MPa (90 – 116 ksi)
Yield Strength 450 – 650 MPa (65 – 94 ksi)
Elongation 25 – 40%
Hardness (Rockwell B) 260 – 330 HB
Impact Toughness 100 – 200 J (at -50°C)

Fabrication Data

  • Welding: Duplex 2205 can be welded using conventional methods, but it’s important to use appropriate filler materials and welding techniques to avoid issues such as sensitization and embrittlement. Preheating is generally not required, but interpass temperatures should be controlled to avoid overheating.
  • Machining: The high strength of Duplex 2205 makes it more challenging to machine compared to austenitic stainless steels. Use sharp tools and lower cutting speeds to achieve good results.
  • Heat Treatment: Duplex 2205 is generally not heat treated but is instead supplied in the solution-annealed condition. It should be annealed at 1020-1100°C (1870-2010°F) and rapidly cooled to ensure the optimal microstructure.
  • Forming: The material has good formability in the solution-annealed condition, but care should be taken to avoid cold working that might lead to increased hardness or the formation of undesirable microstructures.
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