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  • TOBO STEEL GROUP CHINA
    Brazil---Aimee
    In the latest vendor rating, TOBO won the excellent rating, it is good, will continue to cooperate.
  • TOBO STEEL GROUP CHINA
    Thailand ---Dave Mulroy
    ASTM A213 T9 Alloy steel pipe ,Stable quality , good price, excellent serive, TOBO GROUP is our trustworthy partner .
  • TOBO STEEL GROUP CHINA
    USA ---Alfaro
    ASTM A182 F55 Super Duplex Flange ,Good quality , we like that ! And delivery time in time also ,very professional.
Contact Person : Joy Wang
Phone Number : 0086-21-31261985
WhatsApp : +8613524668060

UNS S31803 Duplex Stainless Steel Pipe ASTM A790 Seamless Tube with Corrosion Resistance

  • UNS S31803 Duplex Stainless Steel Pipe ASTM A790 Seamless Tube with Corrosion Resistance
  • UNS S31803 Duplex Stainless Steel Pipe ASTM A790 Seamless Tube with Corrosion Resistance
  • UNS S31803 Duplex Stainless Steel Pipe ASTM A790 Seamless Tube with Corrosion Resistance
  • UNS S31803 Duplex Stainless Steel Pipe ASTM A790 Seamless Tube with Corrosion Resistance
  • UNS S31803 Duplex Stainless Steel Pipe ASTM A790 Seamless Tube with Corrosion Resistance
Place of Origin Shanghai, China
Brand Name TOBO
Certification ISO/TUV/SGS
Model Number UNS S31803 / F51 / 1.4462
Minimum Order Quantity 1 PC
Price Negotiable
Packaging Details Standard Shipping Package
Delivery Time 15-30 Workdays
Payment Terms T/T,Western Union
Supply Ability 10 Ton/Month
Product Details
Grade UNS S31803 (F51 / 1.4462) Outer Diameter 10mm - 610mm
Wall Thickness 0.5mm - 45mm Length 5.8m / 6m Or Custom Cut Length
Standard ASTM A790 / ASME SA790 / EN 10216-5 Type Seamless Cold Drawn / Cold Rolled
Surface Pickling, Annealed, 2B Finish, No.4 Polish Application Chemical Processing, Marine Environments, Pulp & Paper, Oil Refining, Structural Components
End Type Plain End, Beveled End, Threaded
Highlight

Duplex F51 1.4462 Seamless Pipe

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ASTM A790 S31803 Certified

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ISO TUV SGS Corrosion Resistant
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Product Description
UNS S31803 Duplex Stainless Steel Pipe ASTM A790 F51 1.4462 Seamless Tube ISO TUV SGS Certified
UNS S31803 Duplex Stainless Steel Pipe ASTM A790 F51 DIN 1.4462

UNS S31803 (F51 / DIN 1.4462) is the original duplex stainless steel grade offering a balanced austenitic-ferritic microstructure with approximately equal phase proportions. It provides a compelling combination of high strength, excellent corrosion resistance, and cost-effectiveness compared to super duplex and high-nickel alloys.

Chemical Composition
Grade C max Si max Mn max P max S max Cr Ni Mo N
UNS S31803 0.030 1.00 2.00 0.030 0.020 21.0-23.0 4.5-6.5 2.5-3.5 0.08-0.20
Mechanical Properties
Grade Yield Strength (MPa) Tensile Strength (MPa) Elongation (%) Hardness (HRC)
UNS S31803 ≥450 ≥620 ≥25 ≤20
Key Features
  • Yield strength approximately double that of 304/316 austenitic stainless steels
  • Excellent resistance to stress corrosion cracking in chloride-bearing environments
  • Good resistance to pitting and crevice corrosion
  • Superior thermal conductivity and lower thermal expansion than austenitic grades
  • Cost-effective solution with proven performance across multiple industries
Applications

Commonly used in chemical process piping, marine and coastal equipment, pulp and paper digesters, oil and gas flow lines, pressure vessels, heat exchangers, and structural applications where weight savings from higher strength enable material cost reduction.

Quality Assurance
Comprehensive quality testing includes dimensional inspection, chemical analysis, tensile testing, flattening testing, hydrostatic pressure testing, and non-destructive eddy current testing. Certified to ISO TUV SGS standards with full traceability documentation.
Tags:

duplex ss pipe

super duplex stainless steel pipe

thin wall stainless steel tubing