Duplex Steel

Duplex Steel

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.





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 :Duplex 2205, Duplex 2507, Duplex 31803


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 : Duplex 2205, Duplex 2507, Duplex 31803


Duplex Steel Forged Fittings Specification

Standard : ASTM A182 / ASME SA182

Size : : 1/2"NB TO 4"NB IN(Socketweld & Screwed-Threaded)

Grade : Duplex 2205, Duplex 2507, Duplex 31803


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, S 32205, S32550, S32750, S32760


Duplex Steel Bars and Rods Specification

Standard :ASTM / ASME SA A582, A276, A564, ASTM A484, 484M

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, S 32205, S32550, S32750, S32760


Duplex Steel Fasteners Specification

Standard : ASTM A182 / A240, ASME SA182 / SA240

Size : M02 to M30

Grade : Duplex 2205, Duplex 2507, Duplex 31803


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 : Duplex 2205, Duplex 2507, Duplex 31803

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