2205 Duplex Stainless Steel Coil | Dual-Phase Powerhouse for Harsh Environments
✓ SCC Immunity: PREN (Pitting Resistance Equivalent) ≥34, validated by 5,000+ hours in ASTM G48 Method A testing.
✓ Double the Strength: Minimum yield strength 450 MPa (vs 316L’s 170 MPa), enabling lighter, thinner designs.
✓ Acid Warfare Ready: Withstands 10% sulfuric acid at 50°C (122°F) – 3x longer lifespan than 904L.
✓ Welding Precision: Nitrogen-enhanced microstructure maintains phase balance even with 2.5 kJ/mm heat input.
2205 Duplex Stainless Steel Coil (UNS S32205/S31803)
Mastering the synergy of strength and corrosion resistance, 2205 duplex stainless steel coil combines austenitic and ferritic microstructures to deliver 2x the yield strength of 316L with unmatched resistance to chloride stress corrosion cracking (SCC). Certified to ASTM A240/A789 and NACE MR0175, this lean-alloyed duplex grade (22% Cr, 3% Mo, 5% Ni + Nitrogen) is the cost-efficient champion for offshore, chemical processing, and desalination applications.
Thickness: 0.5mm–12mm (cold-rolled ±0.02mm; hot-rolled ±0.5%)
Width: 600mm–2,000mm (slitting tolerance ±0.3mm)
Surface Finishes: 2B, Pickled, Shot Blasted, or Electropolished (Ra ≤0.8μm)
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 (ferritic-austenitic duplex structure) |
| Corrosion Resistance | Exceptional resistance to chloride SCC, pitting (PREN≥34), crevice corrosion; resistant to sulfuric and hydrochloric acids |
| 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 |
| Coil Dimensions | Thickness: 0.5mm-100mm; Width: 1000mm-2000mm; Inner Diameter: 508mm/610mm (standard) |
| 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 components |
2205 Duplex Stainless Steel Coil Applications
| Industry | Critical Use Cases | 2205 Coil Advantage |
|---|---|---|
| Oil & Gas | Subsea X-mas trees, flowline pipes | NACE MR0103 compliance for H2S partial pressures >0.3 psi. |
| Desalination | RO membrane housings, brine heaters | 10x chloride crevice corrosion resistance vs 316L. |
| Chemical Processing | Phosphoric acid reactors, urea strippers | 0.02mm/year corrosion rate in 40% HNO3 at 80°C. |
| Pulp & Paper | Digester vessels, bleach plant equipment | Immune to chloride-induced pitting in 60°C seawater. |
2205 Duplex Stainless Steel Coil Product Packaging
2205 Duplex stainless steel coils are packaged in triple-sealed anti-static polyethylene packaging to prevent scratches, dust and oxidation during transportation. Each package is lined with VCI (vapor rust inhibitor) paper, which releases protective molecules to prevent rust in humid or salty environments, ideal for coastal construction or chemical industries. Bulk orders are secured on ISO-certified heavy-duty pallets with reinforced steel edges and weather-resistant shrink wrap to ensure stability for large-volume shipments. Environmentally conscious customers can choose FSC-certified recycled cardboard boxes or reusable aluminum packaging boxes, which can reduce landfill waste by 90%.
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 Coil 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. Maintain 30-50% ferrite in weld metal (verified by Feritscope®).
Q3: Can 2205 replace titanium in coastal applications?
A: Yes for temps ≤80°C and chlorides ≤50,000ppm. Specify 2B finish + passivation (ASTM A967 Nitric 3) for optimal performance.
Q4: What certifications are included?
Every coil ships with:
- EN 10204 3.1 Certificate
- Impact Test Report (ISO 148-1)
- Intergranular Corrosion Test (ASTM A262 Practice E)
Q5: What’s the minimum order quantity (MOQ)?
Stock sizes: 1000 kg MOQ.
Custom specs: 5 tons MOQ (30-day lead time).
Urgent orders: 15 tons MOQ (15-day express).
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