Materials

SUPERDUPLEX SAF®25071.4410 – UNS S32750 – X2CrNiMoN 25 7 4

Super Duplex alloy UNS S32750 (F53 / 1.4410 / 32750 / Alloy 2507) has excellent corrosion resistance to a wide variety of media, with outstanding resistance to pitting and crevice corrosion in seawater and other chloride containing environments, with Critical Pitting Temperature exceeding 50°C.
UNS S32750 (F53 / 1.4410 / Alloy 32750) exhibits a low coefficient of thermal expansion and higher heat conductivity than austenitic steels and is suitable for working temperatures up to 300°C.
Alloy 32750 can be used in a wide variety of applications

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Products

SUPERDUPLEX SAF®2507
Availability
seamless-pipe Seamless Tubes

  stock
welded-pipe Welded Tubes
plate Plates  stock
bar Bars  stock
flanges Flanges  stock
accessories Fittings  stock

Applications

  • Pulp and paper industry
  • Desalination plants
  • Flue-gas cleaning
  • Cargo tanks and pipe systems in chemical tankers
  • Seawater systems
  • Firewalls and blast walls on offshore platforms
  • Bridges
  • Components for structural design
  • Storage tanks
  • Pressure vessels
  • Heat exchangers
  • Water heaters
  • Pollution control
  • Mining & mineral industries
  • Marine industries
  • Pipework systems
  • Rotors, impellers and shafts

General characteristics

  • Good to very good resistance to uniform corrosion
  • Good to very good resistance to pitting and crevice corrosion
  • High resistance to stress corrosion cracking and corrosion fatigue
  • High mechanical strength
  • Good abrasion and erosion resistance
  • Good fatigue resistance
  • High energy absorption
  • Low thermal expansion
  • Good weldability

Technical information

Specifications

 

Superduplex 32750 – UNS S32750
Product Norm ASTM
Seamless Tubes A-789 A-790
Welded Tubes  
Plates A-240
Bars A-276 A-479
Flanges A-182 A-988
Fittings A-815 A-988

Chemical specifications %

 

Superduplex 32750 – UNS S32750
Element Simbol Maximum %
Carbon C 0,030
Manganese Mn 1,20
Phosphorus P 0,035
Sulfur S 0,020
Silicon Si 0,80
Nickel Ni 6,0-8,0
Chrome Cr 24,0-26,0
Molybdenum Mo 3,0-5,0
Nitrogen N 0,24-0,32
Copper Cu 0,50

Mechanical Properties

Superduplex 32750 – UNS S32750
Norm Rm min. Rp 0,2% min. E4d min.% Z min.% T.I.(J) HR B HB
A-182 116 (800) 80 (550) 15 310
A-240 116 (795) 80 (550) 15 310
A-789 116 (800) 80 (550) 15 310
A-790 116 (800) 80 (550) 15 310
A-815 116-140 (800-965) 80 (550) 15 310
A-988 116 (800) 80 (550) 15 310
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