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 | Duplex Stainless Steel Pipe Seamless ，Duplex Stainless Steel Pipe Welded ，ASTM A790 Stainless Steel Pipe | ||
ASTM A790 duplex stainless steel pipe is manufactured in accordance with the American standard for seamless and welded ferritic-austenitic duplex stainless steel pipe. This specification covers pipe intended for general corrosive service, with particular emphasis on applications requiring high strength and excellent resistance to pitting, crevice corrosion, and stress corrosion cracking.
Our ASTM A790 duplex pipes are available in standard duplex grades (2205), super duplex grades (2507), and lean duplex grades (2304), offering solutions for a wide range of demanding environments.
| Parameter | Details |
|---|---|
| Standard | ASTM A790 / ASME SA790 |
| Grades | 2205 (UNS S31803, S32205), 2507 (UNS S32750), S32760, 2304 (UNS S32304) |
| Size (OD) | 6.0 mm – 610 mm (1/8" – 24") |
| Wall Thickness | Schedule 5S, 10S, 40S, 80S, 160, XXS (0.5 mm – 25.0 mm) |
| Length | 3000 mm, 6000 mm, random lengths 6m – 12m (custom cut available) |
| Pipe Type | Seamless (SMLS) or Welded (ERW / EFW / DSAW) |
| Surface Finish | Mill finish, Pickled, Annealed |
| Type | Description | Size Range | Best For |
|---|---|---|---|
| Seamless (SMLS) | Extruded from solid billet, no weld seam | Up to 610 mm OD | High pressure, sour service, critical applications |
| Welded (ERW) | Electric resistance welded | Up to 610 mm OD | General corrosive service, lower cost |
| Welded (EFW/DSAW) | Fusion welded with filler | Large diameters | Large diameter, high volume applications |
| Element | 2205 (S31803) | 2205 (S32205) | 2507 (S32750) | 2304 (S32304) |
|---|---|---|---|---|
| Carbon (C) ≤ | 0.030 | 0.030 | 0.030 | 0.030 |
| Silicon (Si) ≤ | 1.00 | 1.00 | 0.80 | 1.00 |
| Manganese (Mn) ≤ | 2.00 | 2.00 | 1.20 | 2.50 |
| Phosphorus (P) ≤ | 0.030 | 0.030 | 0.035 | 0.035 |
| Sulfur (S) ≤ | 0.020 | 0.020 | 0.020 | 0.020 |
| Chromium (Cr) | 21.0 – 23.0 | 22.0 – 23.0 | 24.0 – 26.0 | 21.5 – 24.5 |
| Nickel (Ni) | 4.5 – 6.5 | 4.5 – 6.5 | 6.0 – 8.0 | 3.0 – 5.5 |
| Molybdenum (Mo) | 2.5 – 3.5 | 3.0 – 3.5 | 3.0 – 5.0 | 0.05 – 0.60 |
| Nitrogen (N) | 0.08 – 0.20 | 0.14 – 0.20 | 0.24 – 0.32 | 0.05 – 0.20 |
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| 2205 (S31803) | ≥ 620 | ≥ 450 | ≥ 25 | ≤ 290 |
| 2205 (S32205) | ≥ 620 | ≥ 450 | ≥ 25 | ≤ 290 |
| 2507 (S32750) | ≥ 730 | ≥ 550 | ≥ 20 | ≤ 310 |
| 2304 (S32304) | ≥ 600 | ≥ 400 | ≥ 25 | ≤ 290 |
Note: The values above are minimum requirements per ASTM A790. Please refer to the mill test certificate for actual data.
| Grade | PREN | Pitting Resistance |
|---|---|---|
| 2304 (Lean Duplex) | 24 – 26 | Good |
| 2205 (Standard Duplex) | 33 – 35 | Excellent |
| 2507 (Super Duplex) | 41 – 45 | Superior |
PREN = %Cr + 3.3(%Mo) + 16(%N). Higher value indicates better pitting resistance.
| Grade | Typical Applications |
|---|---|
| 2304 (Lean Duplex) | Cost effective alternative to 316L, fresh water, food processing, structural |
| 2205 (Standard Duplex) | Oil and gas flow lines, chemical processing, marine, heat exchangers, desalination |
| 2507 (Super Duplex) | Deepwater subsea, seawater cooling, sour service (H₂S), FGD systems, offshore |
Need duplex pipe to ASTM A790 specifications? We are ready to supply.
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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