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 Fe% Ni% Cr% Mo% N% C% Mn% Si% S% P% Cu%
Super Duplex S32750 Bal. 6.0-8.0 24.0-26.0 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


Grade UNS ASTM Werkstoff
Super Duplex S32750 S32750 F53 1.4410

Physical Properties

Grade Density
Super Duplex S32750 7.8 g/cm3

Mechanical Properties

Form Tensile Strength Yield Strength σp0.2/MPa Elongation
Reduction% Brinell Hardness
Sheet/Plate Min 750 Mpa Min 550 Mpa Min 25% Min 55% Max 270
Bar Min 750 Mpa Min 550 Mpa Min 25% Max 290

Our Production Standard

Standard Bar Forging Sheet/Plate

Size Range

Super Duplex S32750 bar, rod, forging, plate, sheet are available.

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