Duplex Steel

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Duplex Steel were originally created to combat corrosion problems caused by chloride-bearing cooling waters and other aggressive chemical process fluids. Called Duplex because of its mixed microstructure with about equal proportions of ferrite and austenite, duplex stainless steels are a family of grades, which range in corrosion performance depending on their alloy content. The chemical composition based on high contents of Cr and Mo, improves intergranular and pitting corrosion resistance, respectively. Additions of nitrogen can promote structural hardening by interstitial solid solution mechanism, which raises the yield strength and ultimate strength values without impairing toughness. Moreover, the two-phase microstructure guarantees higher resistance to pitting and stress corrosion cracking in comparison with conventional stainless steels.

Available forms are Duplex Steel Pipes & Tubes, Duplex Steel Round Bars, Duplex Steel Fasteners, Duplex Steel Sheet, Duplex Steel Plate, Duplex Steel Forged Fittings, Duplex Steel Valves, Duplex Steel pipe fittings, Duplex Steel flanges.

Types Of Duplex Steel

Duplex Steel Pipes & Tubes Specification
  • Standard : ASTM A790 / ASME SA790
  • Size : 1/8" NB upto 48" NB in Sch. 5, 10, 40, 80, 160, Xs, XXS
  • Grade : UNS NO. S31803, S32205, 2205
Duplex Steel Pipe Fittings Specification
  • Standard : ASTM / ASME A815 / SA815
  • Size : 1/8" NB upto 48" NB in Sch. 5, 10, 40, 80, 160, Xs, XXS
  • Grade : UNS NO. S31803, S32205, 2205
Duplex Steel Forged Fittings Specification
  • Standard : ASTM A182 / ASME SA182
  • Size : 1/2"NB TO 4"NB IN(Socketweld & Screwed-Threaded)
  • Grade : UNS NO. S31803, S32205, 2205
Duplex Steel Sheets And Plates Specification
  • Standard : ASTM A240 / ASME SA240
  • Width : 600mm ~ 2000mm
  • Thickness : 0.1 mm to 12 mm Thk.
  • Form : Coils, foils, shim sheet, perforated sheet, strip, flats, blank (circle), ring (flange), etc.
  • Grade : UNS NO. S31803, S32205, 2205
Duplex Steel Bars and Rods Specification
  • Standard : ASTM / ASME SA276/ SA479
  • Range : 10 mm To 100 mm Dia in 100 mm TO 6000 mm Length.
  • Size : Tolerance: H8, H9, H10, H11, H12, H13K9, K10, K11, K12 or as per clients’ requirements
  • Form : Round Square Hex (A/F) Bush Rectangle Flat
  • Grade : UNS NO. S31803, S32205, 2205
Duplex Steel Fasteners Specification
  • Standard : ASTM A193 / A194, ASME SA193/ SA194
  • Size : M02 to M30
  • Grade : UNS NO. S31803, S32205, 2205
Duplex Steel Flanges Specification
  • Standard : ASTM A182 /ASME SA182
  • Size : 1/8" NB upto 24" NB in Sch. 150#, 300#, 600#, 900#, 1200#, 1500#, Table D, Table E
  • Class : 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS DIN Standard ND-6,10, 16, 25, 40 Etc.
  • Grade : UNS NO. S31803, S32205, 2205

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