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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 Duplex 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
Duplex Steel Pipe & Tubes
Duplex Steel Flanges
Duplex Steel Flanges
Duplex Steel Forged Fittings
Duplex Steel Forged Fittings
Duplex Steel Pipe Fittings
Duplex Steel Pipe Fittings

Duplex Steel Pipes and Tubes Specification
Standard : ASTM A790 / ASME SA790
Size : 1/2" TO 48" NB & OD Both (Welded Thickness : 1MM TO 40 MM )
Grade :Duplex 2205, Duplex 2507, Duplex 31803
Duplex Steel Flanges Specification
Standard : ASTM A182 /ASME SA182
Size : 1/2” to 48”
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
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 Pipe Fittings Specification
Standard : ASTM / ASME A815 / SA815
Size : 1/2" to 24" NB to 24″NB in Sch 10S, 40S, 80S, 160s, XXS
Grade : Duplex 2205, Duplex 2507, Duplex 31803
Duplex Steel Sheets and Plates Specification
Standard : ASTM A240 / ASME SA240
Size : 1 MM To 200 MM Thk In 1000 MM To 3000 MM Width x 2500 MM/ 5000 MM / 10000 MM Length & In Coil Form
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