ASTM A790 UNS S31803 Pipes & Tubes

ASTM A790 UNS S31803 Pipes & Tubes

ASTM A790 UNS S31803 Pipes & Tubes

Meta Aerospace is a leading ASTM A790 UNS S31803 Pipes & Tubes Manufacturer and Supplier in India, providing the highest quality corrosion and temperature resistance. As a PED-approved manufacturer and Govt. of India recognized Export House, Rexton Steel & Alloys is committed to delivering precision smooth bore duplex steel UNS S31803 Pipe/tubing for various applications, including marine environments, brackish water, bleaching operations, closed-loop water systems, and certain food processing applications. These ASTM A790 UNS S31803 Duplex Pipes & Tubes are nitrogen-enhanced duplex pipes designed to address the limitations of 300 series seamless stainless steel pipes, falling within the range of 316 L and 317 L of the 300 series. The term “duplex” signifies the dual structure of these pipes, which possess characteristics of both ferritic and austenitic stainless steel structures, unlike standard ferritic pipes or fully austenitic SS structures found in 304 stainless steel pipes. At Meta Aerospace, we ensure the highest quality Duplex Steel UNS S31803 seamless pipe for use in extreme environments. Committed to meeting both material and supplier relationship needs, our Duplex Steel UNS S31803 Welded Pipe/tubing, made from cold-formed stainless steel, boasts a smooth finish and strong mechanical traits, along with closer tolerances compared to hot-formed coil-based welded pipes.

Uses and Applications of ASTM A 790 UNS S31803 Pipes & Tubes

Specifications of ASTM A790 UNS S31803 Pipes & Tubes

SpecificationASTM A790 / ASME SA790
StandardASTM, ASME and API

Seamless – 1/2″ NB TO 18″ NB

Welded / ERW- 1″ NB TO 16″ NB

EFW – 8″ NB TO 110″ NB

TypesSeamless / Welded / ERW / EFW / Cold Draw / Hot Finish / Cold Finish
Length01 Meter to 12.5 Meters, Single Random Length, Double Random Length And Customize Size.
Outer Diameter6.00 mm OD up to 914.4 mm OD, Sizes up to 24” NB
Wall Thickness(3 mm to 100 mm Thickness) SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
FormRound Pipes, Square Pipes, Rectangular Pipe
EndPlain End, Beveled End, Treaded

ASTM A790 UNS S31803 Duplex Pipes & Tubes Equivalent Grades

StandardDuplex S31803
Werkstoff Nr.1.4462

ASTM A790 UNS S31803 Pipes & Tubes Chemical Properties

Grade CMnSiPSCrMoNiN
2205 (UNS S31803)Min Max– 0.030– 2.00– 1.00– 0.030– 0.02021.0 23.02.5 3.54.5 6.50.08 0.20

ASTM A790 UNS S31803 Pipes & Tubes Mechanical Properties


Tensile Strength

(MPa) min

Yield Strength

0.2% Proof

(MPa) min


(% in 50mm) min

Rockwell C (HR C)Brinell (HB)
UNS S31803 / 22056214482531 max293 max

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