Yuhong Group Co.,Ltd
| Payment Terms | T/T,L/C |
| Delivery Time | according to quantity |
| Packaging Details | Plywood Case/Woven bag in bundle |
| Supply Ability | 1000 tons per month |
| Standard | ASTM A789/ASME SA789 |
| Material | UNS S31803; 1.4462 |
| Type of Tube | Straight seamless tube |
| Application | Heat Exchanger |
| Length | 6m or as required |
| Delivery Condition | Solution Annealed & Pickled |
| Packing | Plywood case/Woven bag in bundle |
| Mill Test Certificate | EN10204 3.1/EN10204 3.2 |
| Brand Name | YUHONG |
| Model Number | ASTM SA789 Duplex 2205 Seamless Tube |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2015 |
| Place of Origin | China |
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Product Specification
| Payment Terms | T/T,L/C | Delivery Time | according to quantity |
| Packaging Details | Plywood Case/Woven bag in bundle | Supply Ability | 1000 tons per month |
| Standard | ASTM A789/ASME SA789 | Material | UNS S31803; 1.4462 |
| Type of Tube | Straight seamless tube | Application | Heat Exchanger |
| Length | 6m or as required | Delivery Condition | Solution Annealed & Pickled |
| Packing | Plywood case/Woven bag in bundle | Mill Test Certificate | EN10204 3.1/EN10204 3.2 |
| Brand Name | YUHONG | Model Number | ASTM SA789 Duplex 2205 Seamless Tube |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2015 | Place of Origin | China |
| High Light | duplex stainless steel pipes astm a789 ，uns s31803 super duplex pipe ，48" duplex stainless steel pipes | ||
Overview:
S31803 is a duplex stainless steel often used for seamless tubes. This grade combines the best features of both austenitic and ferritic steels, resulting in excellent mechanical properties and corrosion resistance. The typical composition includes approximately 22% chromium, 5% nickel, and 3% molybdenum, which enhances its ability to withstand pitting and crevice corrosion, especially in harsh environments.
In applications where strength and corrosion resistance are crucial, S31803 excels, making it a popular choice in the chemical processing, oil and gas, and marine industries. The duplex microstructure provides a good balance of toughness and strength, allowing it to perform well at both ambient and elevated temperatures.
Additionally, S31803 exhibits favorable weldability, although some precautions are necessary to avoid issues like sigma phase formation during high-temperature welding processes. Its excellent mechanical properties include a high yield strength compared to standard austenitic grades, which allows for thinner walls in tube applications, reducing weight without compromising safety or integrity.
Specification:
| Specification | ASTM A789 & Its equivalent ASME, DIN & EN Standard. |
| Grades | UNS S31803; 1.4462 |
| Type | U-bend & Straight seamless tube |
| Outer Diameter | 1/4'' to 2'' or custom size |
| Wall Thickness | BWG25;BWG22;BWG20;BWG18;BWG16;BWG14;BWG12;BWG10 |
| Length | Up to 6 meters, custom cut lengths |
| Delivery Condition | Solution Annealed & Pickled; Bright Annealed |
| Ends | Plain End, Beveled End |
| Other Testing | Product Analysis, Eddy Current Test, Hydrostatic Test, Ultrasonic Test, Flattening Test, Hardness Test, Tensile Test etc. |
| Dimension | All Pipes & Tube Is Manufactured and Inspected / Tested to the Relevant standards including ASTM and ASME |
| Packing | Plywood case/Woven bag in bundle |
Chemical Composition:
| Grade | C | Mn | P | S | Si | Cr | Ni | Mo | N |
| UNS S31803 | 0.03 max | 2.00 max | 0.03 max | 0.02 max | 1.00 max | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 0.08-0.2 |
Mechanical Properties:
| Grade | Tensile Strength, min, ksi (MPa) | Yield Strength, min, ksi (MPa) | Elongation in 2 in. or 50mm, min (%) | Hardness | Solutioning Temperature, min, °F(°C) | |
| Rockwell | Brinell/Vickers | |||||
| UNS S31803 | 90(620) | 65(450) | 25 | 30HRC | 290HBW/290HV | 1870–2010 (1020–1100) |
Applications:
1. Oil and Gas Industry
- Used in offshore platforms, subsea pipelines, and heat exchangers due to resistance to chloride stress corrosion.
2. Chemical Processing
- Suitable for equipment handling aggressive chemicals, including reactors, heat exchangers, and storage tanks.
3. Marine Applications
- Ideal for components exposed to seawater, such as pump shafts, valves, and piping systems.
4. Power Generation
- Used in cooling systems, especially in nuclear and fossil fuel plants where corrosion resistance is critical.
5. Pulp and Paper Industry
- Employed in chemical recovery systems and other processing equipment that face corrosive conditions.
6. Food and Beverage Processing
- Utilized in components that require high sanitation standards and resistance to corrosion.
7. Desalination Plants
- Perfect for seawater reverse osmosis facilities, where durability and corrosion resistance are essential.
8. Pharmaceuticals
- Used in equipment where hygienic conditions and resistance to cleaning agents are crucial.
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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