Super Duplex UNS S32550

Super Duplex UNS S32550 offers high strength along with good resistance to pitting, crevice and stress corrosion cracking, as well as high energy absorption and good workability & weldability. UNS S32550 offers good resistance to nitric, sulphuric and phosphoric conditions, as well as showing excellent resistance to organic acid. UNS S32550 shows superior corrosion resistance to other austenitic alloys, such as 304, 316 and 317 stainless steels.

West Special Fasteners are manufacturers of Super Duplex UNS S32550 Fasteners.

Super Duplex UNS S32550 Fasteners such as Nuts, Bolts, Studs, Washers, Studbolts, Socket Capscrews, Socket Setscrews, Socket Countersunk screws & machined components to drawings or hot forged items can all be produced at West Special Fasteners Limited.

We can also supply round bar in Super Duplex UNS S32550.

Super Duplex UNS S32550, with its excellent mechanical properties, resistance to corrosion and wear resistance, better than that of austenitic stainless steels, it is the ideal material for components which are in contact with seawater, for example, offshore oil & gas. In addition, UNS S32550 is used in a variety of applications including marine, chemical processing, nuclear, pulp & paper and flue gas desulphurisation.

West Special Fasteners specialise in exotic metals and have supplied major UK, European, International companies with Super Duplex UNS S32550 bolts, nuts, and components etc.

We look forward to helping with your Super Duplex UNS S32550 requirements and would welcome any enquiries by telephone on + 44 (0)1246 291111 or email

Typical Chemical Analysis

C Si Mn P S Cr Ni Mo
0.040 1.000 1.500 0.040 0.030 24.0-27.0 4.5-6.5 2.9-3.9
W N2 Nb Ti Co Cu Al B
0.10-0.25 1.5-2.5
V Fe Mg Ta Nb + Ta Ca O2 Bi
Se Sn Zn Pb

Typical Mechanical Properties

Tensile Strength: 760N/mm² Min Impacts:
0.2% Proof Stress: 550N/mm² Min
Elongation: 15% Min Stress Rupture:
Reduction of Area:
Hardness: 297 BH Max
Other Remarks: