Yuhong Group Co.,Ltd
| Payment Terms | T/T,L/C |
| Supply Ability | 1000 tons per month |
| Delivery Time | Depends on quantity |
| Packaging Details | Ply-wooden Case /Iron Case/ Bundle with plastic Cap/Woven Case |
| Specification | ASTM A789 / ASME SA789 |
| Grade | UNS S32750 / DUPLEX 2507 |
| Type | SEAMLESS / WELDED |
| Non Destructive Test | ET, HT, UT |
| Brand Name | YUHONG |
| Model Number | ASTM A789 S32750 |
| Certification | ABS, GL, DNV, NK, PED, AD2000, ISO 9001 |
| Place of Origin | China |
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Product Specification
| Payment Terms | T/T,L/C | Supply Ability | 1000 tons per month |
| Delivery Time | Depends on quantity | Packaging Details | Ply-wooden Case /Iron Case/ Bundle with plastic Cap/Woven Case |
| Specification | ASTM A789 / ASME SA789 | Grade | UNS S32750 / DUPLEX 2507 |
| Type | SEAMLESS / WELDED | Non Destructive Test | ET, HT, UT |
| Brand Name | YUHONG | Model Number | ASTM A789 S32750 |
| Certification | ABS, GL, DNV, NK, PED, AD2000, ISO 9001 | Place of Origin | China |
| High Light | Seawater Corrosion UNS S32750 Tube ，Offshore Oil Gas UNS S32750 Tube ，ASTM A789 UNS S32750 Tube | ||
ASTM A789 UNS S32750 Super Duplex Steel Tube , For Surviving Seawater Application
ASTM A789 S32750 duplex stainless steel tubes are a premium-grade solution engineered for industries requiring exceptional corrosion resistance,high strength, and durability. Combining the best properties of austenitic and ferritic stainless steels, Duplex 2507 (UNS S32750) is a hyper-duplex alloy ideal for harsh environments such as offshore oil & gas, chemical processing, and marine applications.
Chemical Composition of A789 UNS S32750 Tube
| ELEMENT | CONTENT(%) |
| Cr | 24.0-26.0 |
| Ni | 6.0-8.0 |
| Mo | 3.0-4.0 |
| N | 0.24-0.32 |
| Mn | ≤1.2 |
| Si | ≤0.8 |
| Cu | 0.5-1.0 |
| PREN | ≥40(Cr+3.3Mo+6N) |
PREN (Pitting Resistance Equivalent Number) ensures outstanding resistance to localized corrosion.
Mechanical Properties of A789 UNS S32750 Tube
| PROPERTY | VALUE |
| Tensile Strength | ≥ 800 MPa (116 ksi) |
| Yield Strength (0.2% offset) | ≥ 550 MPa (80 ksi) |
| Elongation (% in 50 mm) | ≥ 15% |
| Hardness (Rockwell C) | ≤ 32 HRC |
| Impact Toughness (Charpy V) | ≥ 100 J (-50°C) |
Combines high strength with excellent toughness, even at sub-zero temperatures.
Physical Properties
| Property | Value |
| Density | 7.8 g/cm³ |
| Melting Range | 1325–1440°C (2420–2625°F) |
| Thermal Expansion (20–100°C) | 13.0 ×10⁻⁶/°C |
| Thermal Conductivity | 15 W/m·K |
| Electrical Resistivity | 80 μΩ·cm |
Optimized for thermal stability and energy efficiency in extreme conditions.
Key Advantages
✅ Double the Strength of 316L
✅ Cost-Effective Longevity
✅ Weldability & Fabrication
Application Fields
1. Oil & Gas Industry
2. Chemical & Petrochemical
3. Marine Engineering
4. Power Generation
5. Pulp & Paper
Certifications & Compliance
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller,Other
Year Established:
2007
Total Annual:
50M-70M
Employee Number:
50~850
Ecer Certification：
Verified Supplier
YUHONG HOLDING GROUP is one of the largest Procurement, Engineering & Contracting Group companies in China. Our group branch company and factory have been already approved by : ABS, LR, DNV, GL, BV, CCS, KR, PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9... YUHONG HOLDING GROUP is one of the largest Procurement, Engineering & Contracting Group companies in China. Our group branch company and factory have been already approved by : ABS, LR, DNV, GL, BV, CCS, KR, PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9...
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