Shanxi Zhongcheng Metal Co., Ltd.
| Payment Terms | T/T，D/P，D/A，Western Union，PayPal |
| Supply Ability | 10000tons |
| Delivery Time | 15-25days |
| Packaging Details | Wooden pallets, wooden crates, woven bags, etc. |
| Country of Origin | MADE IN CHAINA |
| Brand | Baosteel，TISCO |
| Certifications | ISO/EN 10204 Type 3.1 / 3.2 available |
| Grade | 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507 / 630 (17-4PH) |
| MOQ | 100kg |
| Packaging | Wooden Case / Wooden Pallet / Steel Frame / Carton / Woven Bag |
| Supply Capacity | 10000tons |
| Brand Name | Baosteel，TISCO |
| Model Number | 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507 |
| Certification | EN 10204 Type 3.1 / 3.2 available |
| Place of Origin | MADE IN CHAINA |
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Product Specification
| Payment Terms | T/T，D/P，D/A，Western Union，PayPal | Supply Ability | 10000tons |
| Delivery Time | 15-25days | Packaging Details | Wooden pallets, wooden crates, woven bags, etc. |
| Country of Origin | MADE IN CHAINA | Brand | Baosteel，TISCO |
| Certifications | ISO/EN 10204 Type 3.1 / 3.2 available | Grade | 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507 / 630 (17-4PH) |
| MOQ | 100kg | Packaging | Wooden Case / Wooden Pallet / Steel Frame / Carton / Woven Bag |
| Supply Capacity | 10000tons | Brand Name | Baosteel，TISCO |
| Model Number | 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507 | Certification | EN 10204 Type 3.1 / 3.2 available |
| Place of Origin | MADE IN CHAINA | ||
| High Light | S31803 Duplex Stainless Steel Sheet ，Duplex Stainless Steel Sheet Plate | ||
S31803 plate is a duplex stainless steel grade defined under UNS S31803, corresponding to EN 1.4462 and commonly known as Duplex 2205. It features a balanced austenitic-ferritic microstructure (approximately 50% austenite / 50% ferrite), delivering approximately twice the yield strength of standard austenitic grades like 304L or 316L, combined with excellent resistance to chloride stress corrosion cracking (SCC), pitting, and crevice corrosion.
S31803 is one of the original duplex stainless steel specifications and remains widely used in chemical processing, oil & gas, marine, and desalination applications where both high strength and superior corrosion resistance are required.
| Feature | Description |
|---|---|
| Microstructure | Austenitic + Ferritic (≈50/50 dual-phase) |
| Yield Strength | ≥450 MPa (~2× stronger than 316L) |
| PREN | ~35 (excellent pitting resistance) |
| Corrosion Resistance | Superior against SCC, pitting, crevice corrosion |
| Temperature Range | -50°F to 600°F (-46°C to 316°C) continuous service |
| Magnetic | Yes (due to ferrite phase) |
| Weldability | Good with proper procedures |
| Standard | Grade |
|---|---|
| ASTM | UNS S31803 |
| EN | 1.4462 |
| AISI | 2205 |
| JIS | SUS329J3L |
| DIN | X2CrNiMoN22-5-3 |
| ISO | 2205 |
Note: UNS S32205 is a newer specification with tighter composition ranges. S31803 remains acceptable for many applications but may have slightly broader allowable ranges for chromium (21.0-23.0% vs 22.0-23.0%) and molybdenum (2.5-3.5% vs 3.0-3.5%).
| Parameter | Range |
|---|---|
| Thickness | 0.3 mm – 100 mm (custom up to 200 mm available) |
| Width | 50 mm – 3500 mm |
| Length | 1000 mm – 12000 mm (custom available) |
| Standard Coil Widths | 1000 mm, 1219 mm, 1240 mm, 1500 mm, 2000 mm |
| Standard | ASTM A240 / A480, ASME SA240, EN 10088-2, JIS G4304/G4305 |
| Finish | Code | Characteristics | Application |
|---|---|---|---|
| No.1 | Hot rolled, annealed & pickled | Original industrial surface | Pressure vessels, industrial equipment |
| 2B | Cold rolled, bright finish | Smooth, reflective | General fabrication, tanks |
| BA | Bright annealed | Mirror-like reflectivity | Decorative applications |
| No.4 | Brushed | Matte, fine satin finish | Architectural, food processing |
| HL | Hairline | Continuous linear streaks | Building facades, elevators |
| 8K | Mirror | Highly reflective | Luxury decorative finishes |
| Feature | S31803 | S32205 |
|---|---|---|
| Chromium (Cr) | 21.0 – 23.0% | 22.0 – 23.0% |
| Molybdenum (Mo) | 2.5 – 3.5% | 3.0 – 3.5% |
| Nitrogen (N) | 0.08 – 0.20% | 0.14 – 0.20% |
| PREN (typical) | 32 – 38 | 35 – 38 |
| Property Consistency | Broader range | Tighter control |
| Status | Original specification | Modern preferred spec |
S32205 offers tighter composition control and more consistent properties. However, S31803 remains widely accepted and readily available in the market.
| Corrosion Type | Performance |
|---|---|
| Pitting / Crevice | PREN ~35 → excellent resistance in chloride environments; far superior to 304/316 |
| Stress Corrosion Cracking (SCC) | Highly resistant to chloride and H₂S environments; NACE MR0175 compliant for sour service |
| General Corrosion | Superior to 304/316 in organic acids (formic, acetic) and dilute sulfuric acid |
| Intergranular Corrosion | Low carbon content prevents sensitization |
| Seawater Resistance | Excellent; widely used in seawater systems |
Temperature range: 1750 – 2050°F (950 – 1120°C), followed by rapid cooling (water quenching). Avoid working below 1700°F (925°C).
Requires approximately 30-50% higher forming force compared to 316L. Intermediate annealing may be required for severe deformation.
Solution Annealing: 1870 – 2010°F (1020 – 1100°C)
Cooling: Water quench or rapid air cool
Hardening: Not hardenable by heat treatment; only through cold working
Suitable with standard methods (SMAW, GTAW, GMAW, SAW, FCAW)
Recommended filler metal: 2209 (E2209 or ER2209)
Control heat input (0.5 – 2.5 kJ/mm) to maintain phase balance
Preheat is generally not required
Post-weld heat treatment is not typically needed
Avoid overheating to prevent intermetallic phase precipitation
Requires rigid tooling and lower cutting speeds due to higher strength and work hardening tendency.
Get a fast, accurate quote for S31803 Duplex Stainless Steel Plates tailored to your project requirements.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller
Year Established:
2010
Total Annual:
20000000-50000000
Employee Number:
50~100
Ecer Certification：
Verified Supplier
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