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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 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.
Duplex Steel Rings

Duplex Steel Rings

Duplex Steel Pipe Fittings

Duplex Steel Pipe Fittings

Forged Fittings

Duplex Steel Forged Fittings

Duplex Steel Flanges

Duplex Steel Flanges

Duplex Steel Ring Specification

Specifications : ASTM A240 / ASME SA240

Dimensions : ASTM, ASME and API

Thickness : 1 Mm To 100 Mm

Diameter : Upto 2000 Mm

Inner Dia : Minimum 50mm-1000mm(tool cut) above that plazma cut.

Cutting : Plazma, Machined Cut & Punch Cutting.

Ring Diameter : 3" OD up to 48" OD Up to 900 lbs max



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

Size : Tolerance: H8, H9, H10, H11, H12, H13K9, K10, K11, K12 or as per clients’ requirements

Range : 10 mm To 100 mm Dia in 100 mm TO 6000 mm Length

Form : Round Square Hex (A/F) Bush Rectangle Flat

Grade : UNS NO. S31803, S 32205, S32550, S32750, S32760


Duplex Steel Flat / Angle / Channel Specification

Standard : ASTM / ASME SB 182

Size : 1 MM To 250MM Width 100MM To 6000 MM Length

Type : HR, CR, MAT, Polish

Thickness : 3mm to 50 mm

Grade : UNS NO. S31803, S 32205, S32550, S32750, S32760


Duplex Steel Pipes & Tubes Specification

Standard : ASTM A790 / ASME SA790

Size : 1/2" TO 48" NB & OD Both (Welded Thickness : 1MM TO 40 MM )

Grade : UNS NO. S31803, S 32205, S32550, S32750, S32760


Duplex Steel Flanges Specification

Standard : ASTM A182 /ASME SA182

Size : 1/2” to 48”

Pressure Ratings : 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.

Grade : UNS NO. S31803, S 32205, S32550, S32750, S32760


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 : UNS NO. S31803, S 32205, S32550, S32750, S32760L


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, S 32205, S32550, S32750, S32760L


Duplex Steel Fasteners Specification

Standard : ASTM A182 / A240, ASME SA182 / SA240

Size : M02 to M30

Grade : UNS NO. S31803, S 32205, S32550, S32750, S32760