F53 (UNS S32750 / W.Nr. 1.4410)

F53 (UNS S32750 / W.Nr. 1.4410) is a superduplex stainless steel characterized by higher contents of chrome, molybdenium and nickel than standard duplex steels, resulting in increased corrosion resistance. These steels were developed for applications in aggressive chloride environments. They also have high mechanical strength and low thermal expansion due to the duplex structure.

Equivalent Grades

TrademarkGBGOSTASTMUNSDINW.Nr.NFBSJISSS
F53
URANUS 47N
F53S32750X2CrNiMoN25-7-41.4410Z3CND25.07Az2507

Chemical Composition, %

AlloyCSiMnPSCrNiMoNFe
F53≤0.03≤0.8≤1.2≤0.02≤0.0324.0-26.06.0-6.83.0-5.00.24-0.32Bal

Typical Physical and Mechanical Properties (RT, Annealed)

Density, g/cm3Melting Point, ℃Tensile Strength, MPaYield Strength, MPaELongation, %Hardness, HRB
8.01130-1280≥730≥53025/

Available Products and Specifications

Rod, Bar, Wire and ForgingsASTM A182
Plate, Sheet and StripASTM A312
Pipe and TubeASTM A167, 240
Welding Product
OthersASTM A403

Features

F53 has excellent resistance to pitting and crevice corrosion resistance compared with the ordinary austenitic or duplex types. Due to this F53 stainless steel is used primarily in highly corrosive conditions.

Applications

  • Propeller- and Pumpshafting
  • Pump- and Valveparts
  • Oil- and gas industry
  • Sea water systems
  • Pulp- and Paper industry
  • Chemical Industry