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ASTM A790 UNS S31803 Seamless Duplex Steel Pipe Pickled Annealed

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ASTM A790 UNS S31803 Seamless Duplex Steel Pipe Pickled Annealed

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Brand Name : YUHONG

Model Number : ASTM A790 UNS S31803 Duplex Stainless Steel Pipe

Certification : ABS, LR, GL, DNV, NK, TS, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008

Place of Origin : CHINA

MOQ : 500kgs

Payment Terms : L/C, T/T

Delivery Time : 7 DAYS

Packaging Details : Ply-wooden Case, Bundle with plastic Cap

Standard : ASTM A790, ASME SA790

Grade : UNS S31803, S32750, S32205, S32760

O.D. : 1/8"-48" can custom

W.T. : SCH10 - SCH160

Length : Single Random, Double Random & Cut Length

End : Plain End, Beveled End

Type : Seamless or Welded

Packing : Ply-wooden Case, Bundle with plastic Cap

Application : Power plant, Oil and gas refining, Marine environments, Pollution control equipment

High Light : ASTM A790 UNS S31803 Duplex Stainless Steel Pipe , Pickled and Annealed Seamless Steel Pipe

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ASTM A790 UNS S31803 Duplex Stainless Steel Seamless Pipe


ASTM A790 covers seamless and welded ferritic/austenitic (duplex) stainless steel pipes for corrosion-resistant applications. S31803 refers to the UNS number designating a standard duplex stainless steel grade, often compared to alloy 2205 (UNS S32205), though with slight compositional differences. ASTM A790 S31803 duplex stainless steel seamless pipes excel in demanding environments due to their unique dual-phase structure, offering a blend of strength, corrosion resistance, and cost efficiency. Proper handling during fabrication and application-specific evaluation are crucial to leveraging their full potential.


Economic & Comparative Advantages:

  • Cost-Effective: Lower nickel content than austenitic steels (e.g., 316L), beneficial when nickel prices surge.

  • Versus Super Duplex: S31803 offers a balance between cost and performance, whereas grades like S32750 (PREN >40) provide superior corrosion resistance at higher cost.

Lesser-Known Facts:

  • Nitrogen’s Role: Enhances strength and stabilizes austenite phase, improving weldability.

  • Abrasion Resistance: Superior to austenitic steels, ideal for slurry transportation.

  • Phase Balance: Critical for performance; improper processing can skew the ferritic-austenitic ratio, reducing corrosion resistance.


Chemical Composition of of ASTM A790 Duplex Stainless Steel Pipes

Grade

C

max

Si

max

Mn

max

P

max

S

max

CrNiMoN
UNS S327500.0300.81.20.0300.01524.0-26.06.0-8.03.0-5.00.24-0.32
UNS S318030.0301.02.00.0200.02021.0-23.04.5-6.52.5-3.50.08-0.20
UNS S315000.0301.01.2-2.00.0300.03018.0-19.04.5-5.52.5-3.50.05-0.10



Physical Properties of ASTM A790 Duplex Stainless Steel Pipes

GradeY.S.MPa minT.S.Mpa minElongation %Hardness HRC
UNS S327505508001520
UNS S318034506202520
UNS S315004406303020

Applications

  • Oil & Gas: Offshore platforms, subsea pipelines (resists sour gas/H₂S environments).

  • Chemical Processing: Reactors, tanks handling corrosive chemicals.

  • Desalination Plants: Resistance to saltwater pitting.

  • Pulp & Paper Industry: Handling corrosive bleaching agents.

  • Marine Engineering: Shipbuilding, heat exchangers.

ASTM A790 UNS S31803 Seamless Duplex Steel Pipe Pickled Annealed


Product Tags:

Annealed Duplex Steel Pipe

      

ASTM A790 Duplex Steel Pipe

      

Pickled Duplex Steel Pipe

      
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