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 |
View Detail Information
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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 Precision Pipe ，ASTM A789 Stainless Steel Precision Pipe | ||
ASTM A789 duplex tube is a standard specification for seamless and welded duplex stainless steel tubes intended for general corrosion-resistant and high-strength applications. Duplex stainless steel offers a balanced austenitic-ferritic microstructure (approximately 50% austenite / 50% ferrite), delivering approximately twice the yield strength of common austenitic grades like 304 or 316, combined with excellent resistance to chloride stress corrosion cracking (SCC), pitting, and crevice corrosion.
These tubes are widely used in heat exchangers, condensers, instrumentation lines, hydraulic systems, process piping, and oil & gas exploration, where both strength and corrosion resistance are critical.
| Feature | Description |
|---|---|
| Standard | ASTM A789 / ASME SA789 |
| Construction Types | Seamless and longitudinally welded |
| Microstructure | Austenitic + Ferritic (≈50/50 dual-phase) |
| Yield Strength | 400 – 550 MPa (depending on grade) |
| PREN | 25 – 42 (depending on grade) |
| Corrosion Resistance | Excellent against SCC, pitting, and crevice corrosion |
| Temperature Range | -50°F to 600°F (-46°C to 316°C) |
| Magnetic | Yes |
| Weldability | Good with proper procedures |
| Grade | UNS | Type | Yield Strength (min) | PREN | Key Application |
|---|---|---|---|---|---|
| 2304 | S32304 | Lean Duplex | ≥400 MPa | ~25 | Cost-effective alternative to 304/316 |
| 2205 | S32205 / S31803 | Standard Duplex | ≥450 MPa | ≥35 | Most widely used: heat exchangers, process lines |
| 2507 | S32750 | Super Duplex | ≥550 MPa | ≥42 | Extreme environments; subsea, high chloride |
| S32760 | S32760 | Super Duplex (Z100) | ≥550 MPa | ≥40 | Offshore, seawater, sour service |
| Grade | ASTM UNS | EN | JIS |
|---|---|---|---|
| 2304 | S32304 | 1.4362 | SUS329J3L |
| 2205 | S32205 / S31803 | 1.4462 | SUS329J3L |
| 2507 | S32750 | 1.4410 | SUS329J4L |
| S32760 | S32760 | 1.4501 | — |
| Feature | Seamless Tube | Welded Tube |
|---|---|---|
| Construction | No weld seam | Longitudinal weld |
| Pressure Rating | Higher | Slightly lower |
| Cost | Higher | Lower (10-20% less) |
| Lead Time | Longer | Shorter |
| Size Availability | Limited in large diameters | More flexible |
| Weld Integrity | N/A | 100% NDT tested |
| Best For | High pressure, sour service, critical applications | General service, heat exchangers, cost-sensitive projects |
| Corrosion Type | 2205 Performance | 2507 Performance |
|---|---|---|
| Pitting / Crevice | Excellent (PREN ≥35) | Very High (PREN ≥42) |
| Stress Corrosion Cracking | Highly resistant | Very highly resistant |
| General Corrosion | Superior to 316L | Superior to 2205 |
| Seawater Resistance | Good | Excellent |
| H₂S Sour Service | NACE MR0175 compliant | NACE MR0175 compliant |
Get a fast, accurate quote for ASTM A789 Duplex Tubes 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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