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  • 2205 Duplex Stainless Steel Plate

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2205 Duplex Stainless Steel Plate
2205 duplex stainless steel is a type of steel containing 22% chromium, 2.5% molybdenum and 4.5% nickel-nitrogen alloy. This material possesses high strength, excellent impact toughness, as well as outstanding overall and local resistance to stress corrosion.
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◉ PRODUCT SPECIFICATION


1. Product Overview


Cold Rolled Stainless Steel Plate

Size

Coil

Thickness 0.1mm-3mm,Width can be customized

Plate

Thickness 0.1mm-3mm,Width and Length can be customized

Hot Rolled Stainless Steel Plate

Size

Coil

Thickness 2.8mm-14mm, Width can be customized

Plate

Thickness 2.8mm-20mm,Width and Length can be customized

Finish

2B,2D,BA,NO.1,NO.4,HL,8K


2. Key Standards & Designations


  • ASTM: UNS S32205 / S31803, ASTM A240/A240M (Pressure Vessel Plates)

  • EURONORM: EN 1.4462

  • CHINA: GB/T 24511 (022Cr22Ni5Mo3N)


3. Chemical Composition (% by weight, Typical)


Element

Carbon (C)

Silicon (Si)

Manganese (Mn)

Phosphorus (P)

Sulfur (S)

Chromium (Cr)

Nickel (Ni)

Molybdenum (Mo)

Nitrogen (N)

Min.

-

-

-

-

-

21.00

4.50

2.50

0.14

Max.

0.030

1.00

2.00

0.030

0.020

23.00

6.50

3.50

0.20


4. Mechanical Properties (at Room Temperature, Typical)


Property

Standard Requirement (Plate)

Typical Value

Tensile Strength (σb)

≥ 620 MPa

700 - 900 MPa

Yield Strength (σ0.2)

≥ 450 MPa

500 - 600 MPa

Elongation (δ)

≥ 25 %

≥ 25 %

Hardness (Brinell)

≤ 293 HBW

~240 HBW


5. Physical Properties (Typical)


Property

Value

Density

7.80 g/cm³

Melting Range

1375 - 1425 °C

Specific Heat Capacity (20°C)

450 J/kg·K

Thermal Conductivity (100°C)

17 W/m·K

Mean Coefficient of Thermal Expansion (20-100°C)

13.7 x 10⁻⁶ /K

Modulus of Elasticity

200 GPa


6. Corrosion Resistance


  • General Corrosion: Good resistance to a wide range of organic and inorganic acids, and alkaline media.

  • Pitting & Crevice Corrosion: Excellent resistance due to high Pitting Resistance Equivalent Number: PREN = %Cr + 3.3×%Mo + 16×%N ≈ 34-36.

  • Stress Corrosion Cracking (SCC): Outstanding resistance to chloride-induced SCC, significantly superior to standard austenitic grades like 304L and 316L.


7. Typical Applications


  • Oil & Gas Industry: Pipes, pressure vessels, heat exchangers.

  • Chemical Process Industry: Tanks, reactors, process pipelines.

  • Marine & Offshore: Seawater desalination plants, shipbuilding components.

  • Power & Environmental: Flue Gas Desulfurization (FGD) systems, wastewater treatment.

  • Pulp & Paper Industry: Digesters, bleach plants.

◉ Surfcae selection

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SURFACE CHARACTERISTIC SUMMARY OF MANUFACTURING METHOD APPLICATION
NO.1 Silvery white Hot rolled to specified thickness Do not need to have a glossy surface use
lackluster
NO.2D Silvery white After cold rolling, heat treatment and pickling are carried out General material, deep material
NO.2B Gloss is stronger than No.2D After No.2D treatment, the final light cold rolling is carried out through the polishing roller The general material
BA As bright as a sixpence No standard, but usually a bright annealed surface with high reflectivity. Building materials, kitchen utensils
NO.3 Rough lapping Grind with 100~200# (unit) strop tape Building materials, kitchen utensils
NO.4 Intermediate grinding Polished surface obtained by grinding with 150~180# strop abrasive tape Building materials, kitchen utensils
NO.240 Fine lapping Grinding with 240# strop abrasive tape kitchenware
NO.320 Very fine grinding Grinding was carried out with 320# strop abrasive tape kitchenware
NO.400 The luster is close to BA Use 400# polishing wheel to grind General timber, building timber, kitchen appliances
HL Hairline grinding Suitable particle material for hair stripe grinding (150~240#) with many grains Building, construction material
NO.7 It's close to mirror grinding Use a 600# rotary polishing wheel to grind For art or decoration
NO.8 Mirror ultrafinish The mirror is ground with a polishing wheel Reflector, for decoration

◉ PRODUCTION AND WAREHOUSING

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