Yuhong Group Co.,Ltd
| Payment Terms | L/C, T/T |
| Supply Ability | According to client requirements |
| Delivery Time | Depends on the quantity |
| Packaging Details | Ply-wooden Case / Iron Case / Bundle with plastic Cap |
| Material | S31803 |
| Certificate | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
| Third Party Inspection | BV, SGS, ASP |
| High Light | Seamless Tubes / Welded Tubes |
| Brand Name | YUHONG |
| Model Number | S31803 |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
| Place of Origin | CHINA |
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Product Specification
| Payment Terms | L/C, T/T | Supply Ability | According to client requirements |
| Delivery Time | Depends on the quantity | Packaging Details | Ply-wooden Case / Iron Case / Bundle with plastic Cap |
| Material | S31803 | Certificate | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
| Third Party Inspection | BV, SGS, ASP | High Light | Seamless Tubes / Welded Tubes |
| Brand Name | YUHONG | Model Number | S31803 |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 | Place of Origin | CHINA |
| High Light | ASTM A789 S31803 duplex stainless steel tubing ，seamless welded ferritic austenitic tubing ，stainless steel welded pipe with warranty | ||
ASTM A789 S31803 Seamless And Welded Ferritic/Austenitic (Duplex) Stainless Steel Tubing
ASTM A789 is the standard specification for seamless and welded ferritic/austenitic (duplex) stainless steel tubing for general service. The S31803 grade, commonly referred to as Duplex 2205, is a widely used duplex stainless steel alloy. It combines the properties of austenitic and ferritic stainless steels, offering excellent strength, corrosion resistance, and durability. Below is a detailed introduction to ASTM A789 S31803 duplex steel seamless pipes:
1. Chemical Composition
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 21.0 - 23.0 |
| Nickel (Ni) | 4.5 - 6.5 |
| Molybdenum (Mo) | 2.5 - 3.5 |
| Nitrogen (N) | 0.08 - 0.20 |
| Carbon (C) | ≤ 0.030 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.020 |
| Iron (Fe) | Balance |
2. Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (min) | 620 MPa (90 ksi) |
| Yield Strength (min) | 450 MPa (65 ksi) |
| Elongation (min) | 25% |
| Hardness (max) | 290 HBW |
3. Corrosion Resistance
S31803 duplex stainless steel offers excellent resistance to a wide range of corrosive environments due to its carefully balanced chemistry:
Pitting and Crevice Corrosion Resistance:
Stress Corrosion Cracking (SCC):
General Corrosion Resistance:
4. Manufacturing Process
5. Key Features and Benefits
6. Applications
ASTM A789 S31803 duplex steel seamless pipes are widely used in various industries due to their excellent properties. Common applications include:
7. Comparison with Other Grades
S31803 is often compared with other duplex grades like S32205, which is a closely related variant with slightly higher nitrogen content for improved corrosion resistance. It also competes with austenitic grades like 316L, with S31803 offering better mechanical strength and corrosion resistance.
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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