High-Strength Duplex Stainless Steel Sheet, Combining Superior Corrosion Resistance with Structural Strength, Ideal for Demanding Offshore Platforms and Chemical Vessels
| Element | Content (%) | Role in Duplex Stainless Steel |
|---|---|---|
| Cr | 21.0–23.0 | Forms passive film, enhances corrosion resistance, synergizes with Mo to improve pitting resistance. |
| Ni | 4.5–6.5 | Stabilizes austenite phase, ensures toughness, balances ferrite-austenite ratio at ~50:50 for optimal performance. |
| Mo | 2.0–3.0 | Enhances chloride corrosion resistance, contributes to PREN = Cr% + 3.3×Mo% + 16×N% ≥34. |
| N | 0.14–0.20 | Provides interstitial strengthening, improves strength and corrosion resistance, suppresses intergranular corrosion. |
Physical Properties: Density 7.8 g/cm³, melting point 1300–1390℃, thermal conductivity 25 W/(m·K) (30% higher than 304).
Mechanical Properties: Impact energy ≥27J at –40℃, excellent weldability, welded joints achieve ≥90% of base metal strength.
Grade: 2205 Duplex Stainless Steel (ASTM A240, UNS S32205)
Thickness: 4–30mm (stock: 4–16mm, 30mm available on order)
Width: 1500–2000mm
Length: up to 6000mm
Surface Finish: Pickling (2B), mechanical polishing, sandblasting (anti-slip surface available)
Stainless Steel Plate Bending/Stamping Process
Stainless Steel Plates on Storage Rack
Palletized Stainless Steel Plates
Stainless Steel Plate Rolling Line
Precision Thickness Inspection of Stainless Steel Plate
Forklift Loading Stainless Steel Plates for Shipment
Specification: 8mm × 2000mm
Performance: Corrosion allowance ≤0.05mm after 15 years of seawater exposure
Case: Dalian Heavy Industry offshore wind power foundation structures
Specification: 10mm × 1800mm
Performance: Pressure resistance ≥10MPa, fatigue life ≥500,000 cycles
Case: Sinopec natural gas transmission pipeline
Solution treatment at 1020–1040℃ followed by water quenching to ensure uniform duplex structure and prevent σ-phase precipitation.
15–20% higher than 316L, but with much higher strength, overall project cost is reduced by 10–15%.
Walmay will help match the right stainless product form and specification for your application, confirm quantities and packing needs, and provide requested documents based on order requirements.
