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{"title":"Hot Rolled Stainless Steel Pipe Tube UNS S31803 SS Pipe Tube EN 1.4462 Steel","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/a1\/2b\/2b96f90857f10557b97ab5afb104-200x200-1\/hot_rolled_stainless_steel_pipe_tube_uns_s31803_ss_pipe_tube_en_1_4462_steel.jpg","attrs":{"Brand Name":"DELTA","Model Number":"S31803","Certification":"ISO","Place of Origin":"China"}}
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:
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.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter
Total Annual:
>1000000
Employee Number:
>100
Ecer Certification：
Verified Supplier
Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative... Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative...
