Difference Between Duplex And Super Duplex Steel

Duplex 2205

Duplex Stainless Steel – UNS S31803 / UNS S32205

Duplex Steel also known as Duplex 2205 Stainless Steel is a two-phase, ferritic and austenitic steel with 22% chromium (22cr Duplex) 3% molybdenum, 5 to 6% nickel alloyed stainless steel also known as x2crnimon22-5-3 used extensively in applications that require good corrosion resistance & strength. Heat treatment of Duplex SS 2205 is solution treatment (annealing), between 1020 – 1100°C, followed by rapid cooling. 22 Cr Duplex Stainless Steel cannot be hardened by heat treatment. They can however be work hardened.

1.4462 Stainless Steel Equivalent – 1.4462 | 22Cr Duplex | UNS S31803 (F51) | UNS S32205 (F60) | Alloy 2205 | Sandvik – SAF 2205 | Duplex 2205 | x2crnimon22-5-3 | FALC223 | URANUS 45N (UR 45N) | RA2205 Cronifer® 2205 LCN.

SAF 2205 is Duplex (Austenitic-Ferritic) Stainless Steel characterized by –

  • High resistance to stress corrosion cracking (SCC) in chloride-bearing environments.
  • High resistance to stress corrosion cracking (SCC) in environments containing hydrogen sulfide.
  • High resistance to general corrosion, pitting, and crevice corrosion.
  • High resistance to erosion corrosion and corrosion fatigue.
  • High mechanical strength – roughly twice the proof strength of austenitic stainless steel.
  • Physical properties that offer design advantages.
  • Good weldability.


Super Duplex 2507

Super Duplex Stainless Steel – UNS S32750 / UNS S32760

Super Duplex Steel also is known as SAF 2507 or Super Duplex 2507 with UNS S32750 and UNS S32760 (1.4410 / 1.4501 / F53 / F55 / 2507) is a high alloy duplex stainless steel with a PRE value of min.40*. Super Duplex S32750 and Super Duplex S32760 has 25% chromium (25Cr Duplex), 4% molybdenum, and 7% nickel also known as X2CrNiMoN25 7 4. This high molybdenum, chromium and nitrogen content causes high resistance to chloride pitting and crevice corrosion attack and the duplex structure provides 2507 with exceptional resistance to chloride stress corrosion cracking.

Super Duplex Equivalent names – 25Cr Duplex | 2507 | UNS S32750 (F53) | UNS S32760 (F55) | 1.4410 | Alloy 2507 | SAF 2507 | Super Duplex S32750 | Super Duplex S32760 | X2CrNiMoN25.7.4 | Stainless Steel Super Duplex | 2750 | Duplex 2507 | 1.4501 | Zeron 100 | Super Duplex 2507 | Duplex 2507.

SAF 2507 is a Super Duplex (Austenitic-Ferritic) Stainless Steel is characterized by –

  • Excellent resistance to stress corrosion cracking (SCC) in chloride-bearing environments.
  • Excellent resistance to pitting and crevice corrosion.
  • High resistance to general corrosion.
  • Very high mechanical strength.
  • Physical properties that offer design advantages.
  • High resistance to erosion corrosion and corrosion fatigue.
  • Good weldability.


Duplex Products

Duplex Pipe

  • Duplex Seamless Pipe
  • Duplex Welded Pipe
  • Duplex Round Pipe
  • Duplex Square Pipe
  • Duplex Rectangular Pipe
  • Duplex ERW Pipe
  • Duplex EFW Pipe

Duplex Tube Fittings

  • Duplex Union Tube Fittings
  • Duplex Elbow Tube Fittings
  • Duplex Reducer Tube Fittings
  • Duplex Tee Tube Fittings
  • Duplex Adapter Tube Fittings
  • Duplex Front Ferrule Tube Fittings
  • Duplex Cap Tube Fittings

Duplex Fasteners

  • Duplex Bolts Fasteners
  • Duplex Nuts Fasteners
  • Duplex Screws Fasteners
  • Duplex Washers Fasteners
  • Duplex Stud Bolts Fasteners
  • Duplex Din Bolts
  • 1.4462 Duplex Fasteners

Duplex Tub

  • Duplex Seamless Tube
  • Duplex Welded Tube
  • Duplex Round Tube
  • Duplex Square Tube
  • Duplex Rectangular Tube
  • Duplex ERW Tube
  • Duplex EFW Tube

Duplex Pipe Fittings

  • Duplex Stub Ends Pipe Fittings
  • Duplex Tee Pipe Fittings
  • Duplex Cross Pipe Fittings
  • Duplex Reducer Pipe Fittings
  • Duplex Concentric Reducer
  • Duplex Eccentric Reducer
  • Duplex 3D / 5D Elbow

Duplex Sheet Plate

  • Duplex Diamond Plate
  • Duplex Chequered Plate
  • Duplex Hot Rolled Plates
  • Duplex Shim Sheet
  • Duplex Thin Sheet
  • Duplex Mirror Finish Sheet
  • Duplex Polished Sheet

Duplex Flange

  • Duplex Slip-On Flanges
  • Duplex Threaded Flanges
  • Duplex Weld Neck Flanges
  • Duplex Socket Weld Flanges
  • Duplex Blind Flanges
  • Duplex Reducing Flanges
  • Duplex Lap Joint Flanges

Duplex Forged Fittings

  • Duplex Socket Weld Elbow
  • Duplex Socket Weld Cap
  • Duplex Socket Weld Plug
  • Duplex Threaded Elbow
  • Duplex Threaded Equal Cross
  • Duplex Threaded Union
  • Duplex Threaded Coupling

Duplex Round Bar

  • Duplex Square Bar
  • Duplex Hex Bar
  • Duplex Hexagon Bar
  • Duplex Flat Bar
  • Duplex Round Bar
  • Duplex Threaded Bar
  • Duplex Cold Drawn Bar

Super Duplex Products

Super Duplex Pipe

  • Super Duplex Seamless Pipe
  • Super Duplex Welded Pipe
  • Super Duplex Round Pipe
  • Super Duplex Square Pipe
  • Super Duplex Rectangular Pipe
  • Super Duplex ERW Pipe
  • Super Duplex EFW Pipe

Super Duplex Tube Fittings

  • Super Duplex Union Tube Fittings
  • Super Duplex Elbow Tube Fittings
  • Super Duplex Reducer Tube Fittings
  • Super Duplex Tee Tube Fittings
  • Super Duplex Adapter Tube Fittings
  • Super Duplex Front Ferrule
  • Super Duplex Cap Tube Fittings

Super Duplex Fasteners

  • Super Duplex Bolts Fasteners
  • Super Duplex Nuts Fasteners
  • Super Duplex Screws Fasteners
  • Super Duplex Washers Fasteners
  • Super Duplex Stud Bolts Fasteners
  • Super Duplex Din Bolts
  • 1.4410 Super Duplex Fasteners

Super Duplex Tub

  • Super Duplex Seamless Tube
  • Super Duplex Welded Tube
  • Super Duplex Round Tube
  • Super Duplex Square Tube
  • Super Duplex Rectangular Tube
  • Super Duplex ERW Tube
  • Super Duplex EFW Tube

Super Duplex Pipe Fittings

  • Super Duplex Stub Ends
  • Super Duplex Tee Pipe Fittings
  • Super Duplex Cross Pipe Fittings
  • Super Duplex Reducer Pipe Fittings
  • Super Duplex Concentric Reducer
  • Super Duplex Eccentric Reducer
  • Super Duplex 3D / 5D Elbow

Super Duplex Sheet Plate

  • Super Duplex Diamond Plate
  • Super Duplex Chequered Plate
  • Super Duplex Hot Rolled Plates
  • Super Duplex Shim Sheet
  • Super Duplex Thin Sheet
  • Super Duplex Mirror Finish Sheet
  • Super Duplex Polished Sheet

Super Duplex Flange

  • Super Duplex Slip-On Flanges
  • Super Duplex Threaded Flanges
  • Super Duplex Weld Neck Flanges
  • Super Duplex Socket Weld Flanges
  • Super Duplex Blind Flanges
  • Super Duplex Reducing Flanges
  • Super Duplex Lap Joint Flanges

Super Duplex Forged Fittings

  • Duplex Socket Weld Elbow
  • Duplex Socket Weld Cap
  • Duplex Socket Weld Plug
  • Duplex Threaded Elbow
  • Duplex Threaded Equal Cross
  • Duplex Threaded Union
  • Duplex Threaded Coupling

Super Duplex Round Bar

  • Super Duplex Square Bar
  • Super Duplex Hex Bar
  • Super Duplex Hexagon Bar
  • Super Duplex Flat Bar
  • Super Duplex Round Bar
  • Super Duplex Threaded Bar
  • Super Duplex Cold Drawn Bar

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Other Products

Duplex 2205 Pipe
Duplex 2205 Seamless Pipe
Duplex 2205 Welded Pipe
Duplex 2205 Tube
Duplex 2205 Seamless Tube
Duplex 2205 Welded Tube
Duplex 2205 Pipe Fittings
Duplex 2205 Buttweld Fittings
Duplex 2205 Tube Fittings
Duplex 2205 Compression Fittings
Duplex 2205 Forged Fittings
Duplex 2205 Flange
Duplex 2205 Bolts Fasteners
Duplex 2205 Nuts Fasteners
Duplex 2205 Screw Fasteners
Duplex 2205 Washers Fasteners
Duplex 2205 Round Bar
Duplex 2205 Sheet Plate
Duplex 2205 Vlaves
Super Duplex S32750 Pipe
Super Duplex S32750 Seamless Pipe
Super Duplex S32750 Welded Pipe
Super Duplex S32750 Tube
Super Duplex S32750 Seamless Tube
Super Duplex S32750 Welded Tube
Super Duplex S32750 Pipe Fittings
Super Duplex S32750 Buttweld Fittings
Super Duplex S32750 Tube Fittings
Super Duplex S32750 Compression Fittings
Super Duplex S32750 Forged Fittings
Super Duplex S32750 Flange
Super Duplex S32750 Bolts Fasteners
Super Duplex S32750 Nuts Fasteners
Super Duplex S32750 Screw Fasteners
Super Duplex S32750 Washers Fasteners
Super Duplex S32750 Round Bar
Super Duplex S32750 Sheet Plate
Super Duplex S32760 Pipe
Super Duplex S32760 Seamless Pipe
Super Duplex S32760 Welded Pipe
Super Duplex S32760 Tube
Super Duplex S32760 Seamless Tube
Super Duplex S32760 Welded Tube
Super Duplex S32760 Pipe Fittings
Super Duplex S32760 Buttweld Fittings
Super Duplex S32760 Tube Fittings
Super Duplex S32760 Compression Fittings
Super Duplex S32760 Forged Fittings
Super Duplex S32760 Flange
Super Duplex S32760 Bolts Fasteners
Super Duplex S32760 Nuts Fasteners
Super Duplex S32760 Screw Fasteners
Super Duplex S32760 Washers Fasteners
Super Duplex S32760 Round Bar
Super Duplex S32760 Sheet Plate

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