General Description

Super Duplex S32750 is with 25% chromium, 4% molybdenum and 7% nickel, designed for demanding applications which require exceptional strength and corrosion resistance, such as chemical process, petrochemical, and seawater equipments. UNS S32750 has excellent resistance to chloride stress corrosion and high thermal conductivity, with a low coefficient of thermal expansion. It also has outstanding resistance to pitting and crevice corrosion in seawater and other chloride containing environments, with critical pitting temperature exceeding 50°C.

F53 can be used in applications such as oil and gas industry equipments, offshore platforms, chemical process industries, desalination plants, mechanical and structural components, power industry FGD systems and so on.

Chemical Composition

Grade Ni% Cr% Fe% Mo% N% C% Mn% Si% S% P% Cu%
F53 6.0-8.0 24.0-26.0 Bal. 3.0-5.0 0.24-0.32 Max 0.03 Max 1.2 Max 0.8 Max 0.02 Max 0.035 Max 0.5


UNS S32750


Werkstoff Nr. 1.4410


F53 Bar/Forging: ASTM A276/A479

F53 Sheet/Plate: ASTM A240

F53 Pipe/Tube: ASTM A790

Physical Properties

Density:7.8 g/cm3

Mechanical Properties

Solution Annealed

Tensile: Min 750 MPa

Yield: Min 550 MPa

Elongation: Min 25%

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