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Duplex 2205 Sheet​

Thickness 4–30mm | ASTM A240 Certified

Engineered with twice the yield strength of 304 and superior resistance to chloride stress corrosion (PREN ≥34). Designed for offshore platforms, desalination plants, and chemical pressure vessels. Full MTC traceability and third-party inspection support (SGS/BV) for global engineering projects.

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  • Double the Strength of 304

    Yield strength is twice that of standard austenitic stainless steels, enabling up to 30% structural weight reduction in offshore and heavy-load frameworks, substantially lowering logistics and installation costs.

  • Superior Chloride Resistance

    Offers twice the pitting resistance (PREN ≥34) of 316L in high-chloride seawater environments (up to 30,000ppm), preventing premature failure in marine atmospheres.

  • High Fatigue Strength

    Fatigue strength ≥280MPa ($10^7$ cycles), outperforming conventional stainless grades and ensuring long-term structural integrity under continuous dynamic loads.

Product Specifications

Chemical Composition
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 & Mechanical Properties

  • 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.

Specifications & Supply Range

  • 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)

Pricing Calculation

Workshop & Manufacturing Machine

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

Product Applications

  • Offshore Platform

    Specification: 8mm × 2000mm

    Performance: Corrosion allowance ≤0.05mm after 15 years of seawater exposure

    Case: Dalian Heavy Industry offshore wind power foundation structures used in shipbuilding yards.

  • High-Pressure Pipeline

    Specification: 10mm × 1800mm

    Performance: Pressure resistance ≥10MPa, fatigue life ≥500,000 cycles

    Case: Sinopec natural gas transmission pipeline used in energy production plants.

Additional Information

Heat Treatment

Solution treatment at 1020–1040℃ followed by water quenching to ensure uniform duplex structure and prevent σ-phase precipitation.

Price Reference

15–20% higher than 316L, but with much higher strength, overall project cost is reduced by 10–15%.

Why Choose Walmay for Your 2205 Duplex Stainless Steel?

We combine advanced metallurgical precision with cost-optimized engineering. Choosing Walmay means securing high-performance 2205 duplex steel that reduces your structural weight by 30% while delivering superior corrosion resistance in the harshest environments.

  • Manufacturing Excellence: solution treatment (1020–1040℃) and precise water quenching
  • Engineering Value:   provide technical support.
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FAQs

What makes duplex 2205 different from austenitic stainless steel?
Duplex 2205 features a balanced ~50:50 austenite-ferrite micro-structure, offering double the yield strength of 304/316L and exceptional resistance to stress corrosion cracking in chloride environments.
Do you support third-party inspections for 2205 plates?
Yes, we fully cooperate with third-party agencies such as SGS, BV, and TUV prior to export to guarantee compliance with international engineering standards.
Can duplex 2205 sheets be customized for industrial projects?
Yes, we supply custom thicknesses from 4mm to 30mm, with precision cutting, edge preparation, and full MTC documentation tailored to your project requirements.
What are typical applications of duplex 2205 sheets?
They are commonly used in offshore structures, pressure vessels, heat exchangers, and chemical tanks.
Does duplex 2205 offer better strength than 316L?
Yes. Duplex 2205 typically has nearly twice the yield strength of 316L stainless steel.
Is duplex 2205 sheet corrosion resistant?
Yes. It provides excellent resistance to chloride-induced pitting and crevice corrosion.

Need more details on stainless steel products? Feel free to contact Walmay anytime.

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.

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