Super Duplex UNS S32760 Fasteners

Super Duplex UNS S32760 has a microstructure of approximately 50% austenite and 50% ferrite and has been designed to cope well in aggressive and harsh environments. UNS S32760 contains high molybdenum, chromium and nitrogen which help towards the outstanding resistance to pitting and crevice corrosion in seawater as well as other chloride containing environments, and excellent resistance to SCC (stress corrosion cracking).

West Special Fasteners are manufacturers of Super Duplex UNS S32760 Fasteners.

UNS S32760 Fasteners such as Socket Capscrews, Washers, Nuts, Bolts, Studs, Studbolts, Socket Setscrews, Socket Countersunk screws & machined components to drawings and hot forged items can all be produced at West Special Fasteners Limited.

We can also supply Plates, Strips, Profile cut plate, and round bar in Super Duplex UNS S32760. We have one of the largest stocks of fastener sized UNS S32760 material in the UK today.

Super Duplex UNS S32760 provides higher strength than both austenitic and 22% Cr Duplex and is suitable in a variety of applications and industries such as Chemical Plants, oil & gas pipelines and rigs, power generation and marine environments. UNS S32760 products in these industries would include heat exchangers, pressure vessels, deep sea risers, flue gas desulfurization equipment, swimming pools (good SCC resistance) Subsea Cable Laying, Cable Protection, Flanges, Pumps & Valves and pulp & paper.

West Special Fasteners specialises in exotic metals and have supplied major UK companies with Super Duplex UNS S32760 bolts, nuts etc.

We look forward to helping with your Super Duplex UNS S32760 requirements and would welcome any enquiries by telephone on 0044(0)1246291111, facsimile 0044(0)1246 291177, email [email protected] or via the enquiry page on this website.


Duplex and Super Duplex - Ensuring your fastener is correct by Tim Wilson

Super Duplex UNS S32760 Material Data Sheet

Typical Chemical Analysis

PREN = %Cr + 3.3xMo + 16x%N = ≥40

C Si Mn P S Cr Ni Mo
0.030 1.000 1.000 0.030 0.010 24.0-26.0 6.00-8.00 3.00-4.00
W N2 Nb Ti Co Cu Al B
0.50-1.00 0.20-0.30 0.50-1.00
V Fe Mg Ta Nb + Ta Ca O2 Bi
Se Sn Zn Pb

Typical Mechanical Properties

S32760 Condition A -
Maximum 28 HRC, meets NACE MR0103-2005 for the solution annealed condition.

S32760 Condition S -
Tensile properties of ASTM A193-B7/ASTM A320-L7, plus Charpy impacts, maximum 36 HRC meets NACE MR0175/ISO 15156-3 for the solution annealed & cold worked condition.

- Condition A bolting can be forged and solution annealed prior to final testing, or machined from condition A bar.

- Condition S bolting must be machined from the appropriate grade of bar.