Yuhong Group Co.,Ltd
| Payment Terms | L/C, T/T |
| Delivery Time | 7 DAYS |
| Packaging Details | Ply-wooden Case, Bundle with plastic Cap |
| Standard | ASTM A790, ASME SA790 |
| Grade | UNS S31803, S32750, S32205, S32760 |
| O.D. | 1/8"-48" can custom |
| W.T. | SCH10 - SCH160 |
| Length | Single Random, Double Random & Cut Length |
| End | Plain End, Beveled End |
| Type | Seamless or Welded |
| Packing | Ply-wooden Case, Bundle with plastic Cap |
| Application | Power plant, Oil and gas refining, Marine environments, Pollution control equipment |
| High Light | ASTM A790 UNS S31803 Duplex Stainless Steel Pipe , Pickled and Annealed Seamless Steel Pipe |
| Brand Name | YUHONG |
| Model Number | ASTM A790 UNS S31803 Duplex Stainless Steel Pipe |
| Certification | ABS, LR, GL, DNV, NK, TS, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
| Place of Origin | CHINA |
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Product Specification
| Payment Terms | L/C, T/T | Delivery Time | 7 DAYS |
| Packaging Details | Ply-wooden Case, Bundle with plastic Cap | Standard | ASTM A790, ASME SA790 |
| Grade | UNS S31803, S32750, S32205, S32760 | O.D. | 1/8"-48" can custom |
| W.T. | SCH10 - SCH160 | Length | Single Random, Double Random & Cut Length |
| End | Plain End, Beveled End | Type | Seamless or Welded |
| Packing | Ply-wooden Case, Bundle with plastic Cap | Application | Power plant, Oil and gas refining, Marine environments, Pollution control equipment |
| High Light | ASTM A790 UNS S31803 Duplex Stainless Steel Pipe , Pickled and Annealed Seamless Steel Pipe | Brand Name | YUHONG |
| Model Number | ASTM A790 UNS S31803 Duplex Stainless Steel Pipe | Certification | ABS, LR, GL, DNV, NK, TS, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
| Place of Origin | CHINA | ||
| High Light | Annealed Duplex Steel Pipe ，ASTM A790 Duplex Steel Pipe ，Pickled Duplex Steel Pipe | ||
ASTM A790 UNS S31803 Duplex Stainless Steel Seamless Pipe
ASTM A790 covers seamless and welded ferritic/austenitic (duplex) stainless steel pipes for corrosion-resistant applications. S31803 refers to the UNS number designating a standard duplex stainless steel grade, often compared to alloy 2205 (UNS S32205), though with slight compositional differences. ASTM A790 S31803 duplex stainless steel seamless pipes excel in demanding environments due to their unique dual-phase structure, offering a blend of strength, corrosion resistance, and cost efficiency. Proper handling during fabrication and application-specific evaluation are crucial to leveraging their full potential.
Economic & Comparative Advantages:
Cost-Effective: Lower nickel content than austenitic steels (e.g., 316L), beneficial when nickel prices surge.
Versus Super Duplex: S31803 offers a balance between cost and performance, whereas grades like S32750 (PREN >40) provide superior corrosion resistance at higher cost.
Lesser-Known Facts:
Nitrogen’s Role: Enhances strength and stabilizes austenite phase, improving weldability.
Abrasion Resistance: Superior to austenitic steels, ideal for slurry transportation.
Phase Balance: Critical for performance; improper processing can skew the ferritic-austenitic ratio, reducing corrosion resistance.
Chemical Composition of of ASTM A790 Duplex Stainless Steel Pipes
| Grade | C max | Si max | Mn max | P max | S max | Cr | Ni | Mo | N |
| UNS S32750 | 0.030 | 0.8 | 1.2 | 0.030 | 0.015 | 24.0-26.0 | 6.0-8.0 | 3.0-5.0 | 0.24-0.32 |
| UNS S31803 | 0.030 | 1.0 | 2.0 | 0.020 | 0.020 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 0.08-0.20 |
| UNS S31500 | 0.030 | 1.0 | 1.2-2.0 | 0.030 | 0.030 | 18.0-19.0 | 4.5-5.5 | 2.5-3.5 | 0.05-0.10 |
Physical Properties of ASTM A790 Duplex Stainless Steel Pipes
| Grade | Y.S.MPa min | T.S.Mpa min | Elongation % | Hardness HRC |
| UNS S32750 | 550 | 800 | 15 | 20 |
| UNS S31803 | 450 | 620 | 25 | 20 |
| UNS S31500 | 440 | 630 | 30 | 20 |
Applications
Oil & Gas: Offshore platforms, subsea pipelines (resists sour gas/H₂S environments).
Chemical Processing: Reactors, tanks handling corrosive chemicals.
Desalination Plants: Resistance to saltwater pitting.
Pulp & Paper Industry: Handling corrosive bleaching agents.
Marine Engineering: Shipbuilding, heat exchangers.
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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