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Stockist & Producers Of Nickel Alloys Steel
Duplex & Super Duplex Steel Standard UNS Werkstoff Nr.
Duplex 2205 S31803 / S32205 1.4462
Super Duplex 2207 S32750 / S32950 1.4410
Duplex & Super Duplex :

Duplex alloys 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.

We manufacturers and exports wide range of duplex wire and super duplex wire, duplex Round bar and super duplex Round bar, duplex Forged bar and super duplex Forged bar, duplex hex wire and super duplex hex bar, duplex flat wire and super duplex Flat bar, duplex circles and super duplex Circles, duplex ring and super duplex Ring, duplex tube and super duplex Tube, duplex Seamless Pipe and super duplex Seamless Pipe, duplex Welded/ERW Pipe and super duplex Welded / ERW Pipe, duplex Sheet and super duplex Sheet, duplex plate and super duplex Plate, duplex coil and super duplex Coil, duplex flanges and super duplex Flanges, duplex fasteners and super duplex fasteners, duplex socket weld fittings and super duplex Socket weld Fittings, duplex ferrule fittings and super duplex ferrule fittings, duplex buttweld fittings and super duplex Buttweld fittings Like cap, elbow, tee.

Chemical Composition :
  Ni Cr Mo C N Mn Cu Si P S Fe
Duplex 2205 4.5-6.5 22-23 3.0-3.5 0.030 0.14-0.20 2.00 - 0.80 0.030 0.020 Bal
Super Duplex 2207 6.0-8.0 24-26 3.0-5.0 0.030 0.24-0.32 1.20 0.50 0.10 0.035 0.020 Bal
Mechanical Properties :

 

Tensile Strength Yield Strength
(0.2% Offset)
Elongation Density Melting Point
Duplex 2205 Psi – 90000,
MPa – 620
Psi – 65000,
MPa – 450
30 % 7.8 g/cm3 1440 °C
(2625 °F)
Super Duplex 2207 Psi – 116000,
MPa – 800
Psi – 80000,
MPa – 550
15 % 7.8 g/cm3 1350 °C
(2460 °F)