UNS S32750 Duplex Stainless Steel

UNS S32750/F53/2507, often referred to as Alloy 2507, contains 25% chromium and 7% nickel in addition to a small percentage of copper to enhance its general corrosion resistance. This super duplex grade offers high strength and excellent resistance to pitting and crevice corrosion and chloride stress corrosion cracking. It is widely used in marine, oil and gas exploration/production, and heat exchangers in petrochemical/chemical processing.

Available Forms and Specifications

S32750 sheet/plate/coil: ASTM A240

S32750 seamless pipe/tube: ASTM A789, ASTM A790

S32750 welded pipe/tube: ASTM A928

S32750round bar:ASTM A479, ASTM A276

S32750 Duplex Flanges: ASTM A182 F53

Chemical composition

Cr Ni Mo N Mn Si C Cu S P
24.0-63.0 6.0-8.0 3.0-3.5 0.14-0.2 1.2








0.02 0.035

Mechanical Properties

Density,g/c㎡ 7.8
Melting range,℃ 1350-1390
Tensile strength, min, Mpa 800
Yield strength, 0.2% offset, min, Mpa 550
Elongation, A5% 15
Hardness, Brinell 310 MAX


It is particularly suited for use in aggressive environments such as warm chlorinated seawater

and acidic, chloride-containing media. It is widely used in marine environments, and petrochemical/chemical processing.

Chemical processing| Chloroethylene production equipment, methanol synthesis reactor, acetic acid transport, and storage.

Oil and gas| Oil and gas exploration and transportation, Catalytic cracking equipment, hydrotreating equipment.

Alloy S32750 is widely used in oil and gas industrial, marine industrial, chemical processing, and nuclear industries due to their excellent strength and good corrosion resistance. LKALLOY is an industry-leading supplier of S32750 and other high-quality stainless steel alloys. LKALLOY supplies S32750 stainless steel pipe, tube, plate, and pipe fittings in the solution treated and quenched condition. Available specifications of S32550 is ASTM A240, ASTM A479 and so on.