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

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Product Detail
Outer Diameter :
10mm - 610mm
Surface :
Pickling, Annealed, 2B Finish, No.4 Polish
Standard :
ASTM A790 / ASME SA790 / EN 10216-5
End Type :
Plain End, Beveled End, Threaded
Type :
Seamless Cold Drawn / Cold Rolled
Delivery Time :
15-30 Workdays
Contact Supplier
video
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

TOBO STEEL GROUP CHINA

Verified Supplier
12 Years
shanghai, shanghai
Since 1998
Business Type :
Manufacturer, Agent, Importer, Exporter, Trading Company, Seller
Main Products :
Butt Weld Fittings, Stainless Steel Elbow, Stainless Steel Tee
Total Annual :
100000-100000000
Employee Number :
200~300
Certification Level :
Verified Supplier
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