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Duplex Stainless Steel UNS S31803 Corrosion Resistant Blind Flange and Forged Flange
Duplex Stainless Steel UNS S31803 Corrosion Resistant Blind Flange and Forged Flange
Duplex Stainless Steel UNS S31803 Corrosion Resistant Blind Flange and Forged Flange
Duplex Stainless Steel UNS S31803 Corrosion Resistant Blind Flange and Forged Flange
Specifications
Description
UNS S31803 / 1.4462 / F51 Duplex Stainless Steel Blind Flanges
Material Overview

UNS S31803 duplex stainless steel features a balanced 50:50 microstructure of austenite and ferrite, delivering exceptional mechanical strength (yield strength typically exceeding 480 MPa) combined with good ductility and moderate to excellent corrosion resistance across various environments.

Available with PREN (Pitting Resistance Equivalent) >34 by agreement, this alloy provides maximum pitting corrosion resistance for its grade class. The material also offers superior resistance to stress corrosion cracking and maintains excellent notch ductility at both ambient and subzero temperatures.

This duplex steel serves as an effective alternative to 300 series stainless steels in applications requiring higher mechanical strength, reduced weight, and enhanced stress corrosion cracking resistance.

Fabrication Characteristics

This duplex stainless steel grade presents no significant challenges for machining or welding operations. Comprehensive guidance notes are available upon request.

Typical Applications
  • Pumps, valves, chokes, and Xmas trees
  • Pipework, flanges, bolting, connectors & manifolds
  • Oil and gas industry equipment
  • Brewing, power generation, and chemical engineering equipment
Chemical Composition (Weight %)
Element C Mn Si S P Cr Ni Mo N
Min 21.0 4.5 2.5 0.10
Max 0.03 2.00 1.00 0.015 0.035 23.0 6.5 3.5 0.22
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Duplex Stainless Steel UNS S31803 Corrosion Resistant Blind Flange and Forged Flange

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Duplex Stainless Steel UNS S31803 Corrosion Resistant Blind Flange and Forged Flange
Duplex Stainless Steel UNS S31803 Corrosion Resistant Blind Flange and Forged Flange

BEST PIPELINE EQUIPMENT CO.,LTD

Verified Supplier
9 Years
jiangsu, suzhou
Since 2010
Business Type :
Manufacturer, Distributor/Wholesaler, Agent, Importer, Exporter, Trading Company, Seller, Other
Main Products :
Alloy Steel Seamless Pipes, Boiler Steel Pipe, Heat Resistant Stainless Steel Pipe
Total Annual :
1000000-5000000
Employee Number :
116~209
Certification Level :
Verified Supplier
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