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 | Corrosion Resistant Super Duplex Steel Pipe ，Super Duplex Steel Pipe 6.0mm ，Duplex Steel Pipe ASTM A790 | ||
Corrosion resistant duplex steel pipe is specifically engineered for service in aggressive environments where standard stainless steels such as 304 and 316 are prone to failure. The unique two-phase microstructure (austenite + ferrite) combined with elevated levels of chromium, molybdenum, and nitrogen provides exceptional resistance to a wide range of corrosive attack mechanisms.
Our duplex steel pipes offer outstanding protection against pitting, crevice corrosion, stress corrosion cracking (SCC), general corrosion, and erosion-corrosion, making them the preferred choice for chemical, marine, oil and gas, and desalination applications.
| Parameter | Details |
|---|---|
| Standard | ASTM A790, A789, A928, EN 10216-5, EN 10217-7, NACE MR0175 |
| Grades | 2205 (UNS S31803, S32205), 2507 (UNS S32750), 2304 (UNS S32304), S32760 |
| Size (OD) | 6.0 mm – 1829 mm (1/8" – 72") |
| Wall Thickness | 0.5 mm – 50.0 mm |
| Length | 3000 mm, 6000 mm, random lengths, custom cut |
| Process | Seamless or Welded (ERW, EFW, DSAW) |
| Surface Finish | Annealed and pickled, Bright annealed, Mechanically polished |
| Corrosion Type | Duplex Steel Resistance | Mechanism |
|---|---|---|
| Pitting | Excellent to Superior | High Cr, Mo, and N content (PREN 25-45+) |
| Crevice Corrosion | Excellent to Superior | Same alloying elements protect shielded areas |
| Stress Corrosion Cracking (SCC) | Excellent | Ferrite phase arrests crack propagation |
| General Corrosion | Good to Excellent | High Cr content forms stable passive film |
| Erosion-Corrosion | Good | High hardness and strength resist wear |
| Intergranular Corrosion | Excellent | Low carbon content prevents sensitization |
| Galvanic Corrosion | Good | Compatible with austenitic grades when coupled |
| Hydrogen Induced Cracking (HIC) | Good (with NACE) | Suitable for sour service with certification |
| Element | 2205 (S32205) | 2507 (S32750) | 2304 (S32304) | S32760 |
|---|---|---|---|---|
| Carbon (C) ≤ | 0.030 | 0.030 | 0.030 | 0.030 |
| Chromium (Cr) | 22.0 – 23.0 | 24.0 – 26.0 | 21.5 – 24.5 | 24.0 – 26.0 |
| Nickel (Ni) | 4.5 – 6.5 | 6.0 – 8.0 | 3.0 – 5.5 | 6.0 – 8.0 |
| Molybdenum (Mo) | 3.0 – 3.5 | 3.0 – 5.0 | 0.05 – 0.60 | 3.0 – 4.0 |
| Nitrogen (N) | 0.14 – 0.20 | 0.24 – 0.32 | 0.05 – 0.20 | 0.20 – 0.30 |
| Copper (Cu) | — | ≤ 0.50 | — | 0.50 – 1.00 |
| Tungsten (W) | — | — | — | 0.50 – 1.00 |
| Grade | PREN | Corrosion Resistance Level |
|---|---|---|
| 316L (Austenitic - for reference) | 23 – 25 | Standard |
| 2304 (Lean Duplex) | 24 – 26 | Good (alternative to 316L) |
| 2205 (Standard Duplex) | 33 – 35 | Excellent |
| S32760 (Super Duplex) | 40 – 42 | Superior |
| 2507 (Super Duplex) | 41 – 45 | Superior |
PREN = %Cr + 3.3(%Mo) + 16(%N). Higher PREN indicates better pitting resistance.
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| 2304 | ≥ 600 | ≥ 400 | ≥ 25 | ≤ 290 |
| 2205 | ≥ 620 | ≥ 450 | ≥ 25 | ≤ 290 |
| 2507 | ≥ 730 | ≥ 550 | ≥ 20 | ≤ 310 |
| S32760 | ≥ 730 | ≥ 550 | ≥ 25 | ≤ 310 |
Note: The values above are for reference only. Please refer to the mill test certificate for actual data.
| Environment | 304/316 | 2304 | 2205 | 2507 |
|---|---|---|---|---|
| Fresh Water | Good | Excellent | Excellent | Excellent |
| Tap Water / Potable Water | Good | Excellent | Excellent | Excellent |
| Brackish Water | Fair | Good | Excellent | Excellent |
| Seawater (Splash Zone) | Poor | Fair | Good | Excellent |
| Seawater (Full Immersion) | Not recommended | Limited | Good | Excellent |
| Chloride Solutions (<1000 ppm) | Fair | Good | Excellent | Excellent |
| Chloride Solutions (>1000 ppm) | Poor | Fair | Good | Excellent |
| Sour Service (H₂S) | Not recommended | Not recommended | Good (NACE) | Good (NACE) |
| Acidic Environments | Poor | Fair | Good | Good |
| Caustic Environments | Good | Good | Good | Good |
| Corrosion Challenge | Recommended Grade | Typical Application |
|---|---|---|
| Seawater Pitting | 2507 | Seawater cooling pipes, offshore platforms |
| Chloride SCC | 2205 or 2507 | Chemical plants, heat exchangers |
| Crevice Corrosion | 2507 | Flanges, gasketed joints, submerged service |
| Sour Gas (H₂S) | 2205 (NACE) | Oil and gas flow lines, downhole tubing |
| High Chloride + Low pH | 2507 | Desalination, acid chloride service |
| Erosion from Solids | 2205 | Slurry lines, mining applications |
| High Temperature Corrosion | 2507 | FGD systems, geothermal wells |
For sour service applications containing hydrogen sulfide (H₂S), duplex steel pipe can be supplied to NACE MR0175.
| Requirement | 2205 | 2507 |
|---|---|---|
| Maximum Hardness (HRC) | ≤ 28 | ≤ 28 |
| SSC Resistance | Yes | Yes |
| HIC Resistance | Yes | Yes |
| Sour Service Limit (H₂S partial pressure) | Up to 10 psi (70 kPa) | Up to 10 psi (70 kPa) |
| Certification | NACE MR0175 3.1 | NACE MR0175 3.1 |
Need a pipe that can handle your most aggressive corrosive environment? We have the solution
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
Zhongcheng Metal: A professional supplier of stainless steel tubes and plates. We export to 11 countries, including Germany, the United States, the United Kingdom, and Japan. By adopting advanced manufacturing processes and implementing comprehensive 5S management across our operations, we provide... Zhongcheng Metal: A professional supplier of stainless steel tubes and plates. We export to 11 countries, including Germany, the United States, the United Kingdom, and Japan. By adopting advanced manufacturing processes and implementing comprehensive 5S management across our operations, we provide...
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