2205 Duplex Stainless Steel Plate｜Dual-Phase Excellence for Harsh Environments
✓ Unbeatable SCC Resistance: PREN (Pitting Resistance Equivalent) ≥34, surviving 5,000+ hours in ASTM G48 Method A salt spray testing.
✓ Double the Strength: Minimum yield strength 450 MPa (vs 170 MPa for 316L), enabling thinner/lighter designs.
✓ Acid Warfare Ready: Withstands 10% sulfuric acid at 50°C (122°F), 3x better than 904L.
✓ Weld-Smart Design: Nitrogen-enhanced microstructure maintains phase balance even with high heat input (up to 2.5 kJ/mm).
2205 Duplex Stainless Steel Plate (UNS S32205/S31803)
Mastering the balance of strength and corrosion resistance, 2205 duplex stainless steel plate combines austenitic and ferritic microstructures to deliver 2x yield strength of 316L with superior resistance to chloride stress corrosion cracking (SCC). Certified to ASTM A240/A480 and NACE MR0175 for sour service, this lean-alloyed duplex grade (22% Cr, 5% Ni, 3% Mo + Nitrogen) is the cost-efficient champion for offshore, chemical processing, and desalination applications.
– Thickness Range: 3mm to 100mm (hot-rolled) / 0.8mm to 12mm (cold-rolled, ±0.03mm tolerance)
– Surface Finishes: 2B, Pickled, Shot Blasted, or Electropolished (Ra 0.8μm max)
– Mechanical Properties: Yield Strength ≥450 MPa | Tensile Strength ≥620 MPa | Impact Toughness ≥100J (-40°C)
| Parameter Category | Value/Description |
|---|---|
| Material Grade | UNS S32205/S31803 (per ASTM A240) |
| Composition (%) | C≤0.03, Cr 22.0-23.0, Ni 4.5-6.5, Mo 3.0-3.5, Mn≤2.0, Si≤1.0, N 0.14-0.20, P≤0.03, S≤0.02 |
| Tensile Strength (MPa) | ≥620 (Solution Annealed) |
| Yield Strength (MPa) | ≥450 (Solution Annealed) |
| Elongation (%) | ≥25 (50mm gauge length) |
| Hardness | Brinell (HB): 290-350; Rockwell (HRC): ≤32 (Solution Annealed) |
| Density (g/cm³) | 7.80 |
| Melting Range | 1380-1440℃ |
| Thermal Conductivity (W/m·K) | 15.0 (20℃) |
| Thermal Expansion (10⁻⁶/℃) | 13.0 (20-100℃) |
| Electrical Resistivity (Ω·m) | 0.80×10⁻⁶ (20℃) |
| Elastic Modulus (GPa) | 200 |
| Magnetic Properties | Weakly magnetic (due to ferritic-austenitic duplex structure) |
| Corrosion Resistance | Excellent resistance to chloride stress corrosion cracking (SCC), pitting, crevice corrosion; PREN≥34 |
| Heat Treatment | Solution Annealing: 1020-1100℃ followed by rapid cooling (water or air quenching) |
| Surface Finishes | 2B (Cold-rolled bright annealed), No.1 (Hot-rolled annealed), Sandblasted, Pickling & Passivation |
| Dimension Range | Thickness: 0.5mm-100mm; Width: 1000mm-2000mm; Length: Custom |
| Standards | ASTM A240/A240M, EN 10088-2, JIS G4303, GB/T 3280 |
| Applications | Offshore platforms, oil & gas pipelines, chemical tanks, desalination plants, pulp & paper machinery, bridge structures |
2205 Duplex Stainless Steel Plate Applications
| Industry | Critical Use Cases | 310S Value Proposition |
|---|---|---|
| Petrochemical | Ethylene cracking tubes, reformer furnace internals | Resists metal dusting up to 600°C (1112°F) in syngas environments. |
| Heat Treatment | Annealing trays, carburizing fixtures | 10,000+ thermal cycles lifespan at 1100°C (2012°F). |
| Power Generation | Boiler combustion chambers, superheater tubes | Withstands 25MPa stress rupture strength at 650°C (1202°F). |
| Aerospace | Jet engine combustion liners, afterburner rings | CTE (Coefficient of Thermal Expansion) optimized for thermal shock resistance. |
2205 Duplex Stainless Steel Plate Product Packaging
2205 Duplex Stainless Steel Plates are encased in triple-sealed, anti-static polyethylene wraps to safeguard against scratches, dust, and oxidation during transit. Each plate is interleaved with VCI (Vapor Corrosion Inhibitor) paper, which releases protective molecules to prevent rust formation in humid or saline environments—ideal for coastal construction or chemical industries. Bulk orders are secured on heavy-duty, ISO-certified pallets with reinforced steel edges and weather-resistant shrink wrapping, ensuring stability for high-volume shipments. Eco-conscious customers can choose FSC-certified recycled cardboard sleeves or reusable aluminum crates, reducing landfill waste by 90%. Customizable packaging includes QR-code labels for instant access to ASTM A240 compliance certificates and handling tutorials.
Anti-rust packaging
VCI gas phase anti-rust film + desiccant (12 months moisture-proof for sea transportation)
Reinforcement method
Steel strapping + wooden pallet (load-bearing ≤ 5 tons)
Surface protection
Polyethylene film layered isolation (anti-scratch)
Customization options
IPPC fumigation wooden box (compliant with ISPM15 standard)
Why Choose Us
Where Precision Meets Partnership，25 years of focus on metal material science，Not only a supplier, but also your engineering consultant，Fast and zero compromise，Sustainable trust cycle。
Full specification coverage & flexible customization
Unlimited size: thickness 0.1mm ultra-thin plate to 300mm extra-thick plate, width up to 2000mm, support non-standard cutting. Various surface treatments: 2B, BA mirror, brushed (No.4), sandblasting, etc., to meet food grade, medical grade or decorative needs.
Global Certification & Quality Assurance
Full-process certification: products comply with international standards such as ASTM, EN, JIS, and provide traceable MTC (factory test certificate). Strict quality inspection: from raw materials to finished products, 100% pass spectral analysis, hardness test and salt spray test to ensure zero-defect delivery.
Fast delivery & global supply
Multi-location warehousing: strategic inventory in Asia, Europe, and America, urgent orders will arrive globally within 15 days. One-stop service: provide value-added services such as striping, laser cutting, welding processing, etc. to shorten customer production cycle.
Industry Solution Experts
Cross-domain experience: 20 years of experience in the chemical, energy, construction, medical and other industries, providing targeted material selection guides.
Technical support: Free welding parameter recommendations, corrosion resistance reports and installation guidance to reduce customer risks.
Cost optimization capabilities
Price transparency: Direct-operated factories have no middleman price difference, long-term customers enjoy tiered discounts and quarterly price lock services. Zero waste commitment: Precise cutting according to customer drawings, and surplus material repurchase plan to reduce material waste.
Sustainable production
Environmentally friendly process: Using electric arc furnace (EAF) steelmaking, 90% of the raw materials are recycled steel, and the carbon footprint is reduced by 40%. Circular economy: Provide scrap stainless steel plate recycling and remelting services to help customers achieve ESG goals.
2205 Duplex Stainless Steel Plate Shipping
Sea transport
40HQ container (loading capacity 28 tons) / bulk carrier (LCL minimum 1 ton)
Air transport
reach major airports around the world within 7 days (DDP/DAP terms)
Land transport
door-to-door within China (qualification for dangerous goods transportation)
Our Services
We guarantee global door-to-door delivery within 7–15 business days via partnerships with DHL, Maersk, and UPS.
FAQ
Q1: How does 2205 compare to 2507 super duplex steel?
A: 2205 offers 85% of 2507’s strength at 60% cost, with sufficient corrosion resistance for most applications. Upgrade to 2507 only when PREN >40 is mandatory.
Q2: What filler metals are recommended for welding?
A: Use ER2209 (GMAW) or E2209-17 (SMAW) electrodes. Always maintain 30-50% ferrite content in weld metal (verified by Feritscope®).
Q3: Can 2205 be used in coastal architectural applications?
A1: Yes, but specify 2B finish with passivation (ASTM A967 Nitric 3) for optimal salt spray resistance. Optional PVDF coating available for decorative surfaces.
Q4: What certifications do you provide?
Standard MTC includes:
– EN 10204 3.1 Certificate
– Impact Test Report (ISO 148-1 Charpy V-notch)
– Intergranular Corrosion Test per ASTM A262 Practice E
Q5: What’s the minimum order quantity (MOQ)?
Stock sizes: 1000 kg MOQ.
Custom sizes/heat treatments: 5 tons MOQ with 30-day lead time.
Urgent orders: 10-ton MOQ with 25-day express production.
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