Hot Rolled Stainless Steel Pipe Tube UNS S31803 SS Pipe Tube EN 1.4462 Steel Round Pipe
Price:
5.5-15 USD/Kg
MOQ:
500 kgs
Delivery Time:
5 - 14 days based on the quantity
Brand:
DELTA
Product Description
Hot Rolled Stainless Steel Pipe Tube UNS S31803 SS Pipe Tube EN 1.4462 Steel Round Pipe
Products Specification
| Products Name | 329 Stainless Steel Seamless Pipe |
Grade: |
304 304L 309S 310S 314 315 316L 316Ti 317L 321 329 347H 410 2205 2507 S32760 904L 254SMO and equal grade in GB JIS EN DIN Standard |
| Standards: | ASTM A213M-94b ASTM A249M-94a ASTM A269-94a ASTM A312M-94b,ect. ASTM A790 |
| DIN 17456-85 DIN 17458-85 DIN 17459-92.ect | |
| JIS G3446-1994 JIS G3448-1997 JIS G3459-1997 JIS G3463-1994,ect. | |
| GB13296-1991 GB14975-2002 GB14976-2002,ect. | |
| Size: | ND5 - DN400 |
| Length: | 6m length or cutting any length as request |
| Applications: | fluid and gas transport, structure , boiler, heat exchanger, super heater |
UNS S31803, also widely recognized by its European equivalent EN 1.4462, is a premium duplex stainless steel seamless pipe celebrated for its exceptional balance of strength, corrosion resistance, and versatility. Hot-rolled to achieve optimal mechanical properties, this round pipe is engineered to perform in demanding industrial environments, making it a staple in sectors requiring both durability and reliability. Below is a detailed overview of its key attributes:
Parameters (Chemical Composition & Mechanical Properties)
Chemical Composition (Typical, % by weight)
- 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): ≤ 0.03
- Manganese (Mn): ≤ 2.0
- Silicon (Si): ≤ 1.0
- Phosphorus (P): ≤ 0.03
- Sulfur (S): ≤ 0.02
Mechanical Properties (Hot-Rolled, Seamless)
- Tensile Strength: ≥ 620 MPa
- Yield Strength (0.2% Offset): ≥ 450 MPa
- Elongation (in 50 mm): ≥ 25%
- Hardness: ≤ 290 HBW (Brinell) or ≤ 30 HRC (Rockwell)
Standards
UNS S31803/EN 1.4462 hot-rolled seamless pipes are manufactured and tested in compliance with international standards to ensure quality and consistency, including:
- ASTM A789/A790 (Standard Specification for Seamless and Welded Ferritic/Austenitic Duplex Stainless Steel Pipe and Tube)
- EN 10216-5 (Seamless Steel Tubes for Pressure Purposes – Part 5: Ferritic/Austenitic Duplex Stainless Steel Tubes)
- ASME SA789/SA790 (for pressure vessel and boiler applications)
- ISO 1127 (General Requirements for Stainless Steel Tubes)
Performance Characteristics
The unique duplex microstructure (austenite + ferrite, roughly 50:50) of UNS S31803/EN 1.4462 endows it with a combination of properties unmatched by single-phase stainless steels:
- High Strength: Significantly higher yield strength than austenitic grades (e.g., 304, 316), reducing material thickness requirements and lowering overall weight.
- Excellent Corrosion Resistance: Resistant to general corrosion, pitting, and crevice corrosion (especially in chloride-rich environments) due to its high chromium, molybdenum, and nitrogen content. It performs well in seawater, acidic solutions, and industrial effluents.
- Stress Corrosion Cracking (SCC) Resistance: Outperforms austenitic stainless steels in environments prone to SCC, such as high-temperature chloride solutions.
- Good Weldability: Can be welded using standard techniques (e.g., TIG, MIG) with proper post-weld heat treatment to maintain ductility and corrosion resistance.
- Moderate Formability: Suitable for bending, flanging, and other forming operations, though less malleable than fully austenitic grades.
Equivalent Grades
UNS S31803/EN 1.4462 is globally recognized under various designations, including:
- ASTM: 2205 (duplex stainless steel)
- UNS: S32205 (updated designation, often used interchangeably with S31803)
- JIS: SUS 329J3L
- GB/T (China): 022Cr22Ni5Mo3N
- DIN: W. Nr. 1.4462
Packaging
To ensure protection during transportation and storage, hot-rolled UNS S31803/EN 1.4462 seamless pipes are packaged as follows:
- Pipes are bundled with steel straps, separated by wooden or plastic spacers to prevent scratching.
- Each bundle is wrapped in moisture-resistant plastic film or hessian cloth to avoid corrosion from humidity.
- Pipe ends are capped with plastic or metal protectors to prevent debris ingress.
- Labels include grade, size, length, heat number, and compliance standards for easy identification.
Applications
Thanks to its robust performance, UNS S31803/EN 1.4462 hot-rolled seamless pipes are widely used in:
- Oil & Gas Industry: Offshore platforms, subsea pipelines, and onshore refineries (resistant to sour gas and brine).
- Chemical Processing: Tanks, reactors, and pipelines handling acids (e.g., sulfuric acid), chlorides, and organic solvents.
- Water Treatment: Desalination plants, seawater intake systems, and wastewater processing.
- Marine Engineering: Ship hulls, ballast tanks, and offshore structures exposed to saltwater.
- Pulp & Paper Industry: Equipment for bleaching processes (resistant to chlorine-based chemicals).
- Food & Beverage: Processing lines requiring corrosion resistance and hygiene.
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Company
JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
Location
No.283-1, Youyi Middle Road, Xishan District, Wuxi City, Jiangsu Province
Contact Person
Gao Ben