Duplex and Super Duplex UNS S32760 Flanges

The Duplex and Super Duplex UNS S32760 Flange is a specialized forging component essential for creating secure, leak-proof, and removable connections within a piping system. These flanges are used to join pipes, valves, pumps, and other equipment. Manufactured from the superior Super Duplex UNS S32760 alloy (also known as F55 or Zeron 100), they offer unmatched performance. The material's dual-phase structure and high alloy content, including Tungsten and Copper, result in both high mechanical strength and an exceptionally high Pitting Resistance Equivalent Number. This provides supreme defense against pitting, crevice corrosion, and stress corrosion cracking (SCC) in the harshest chloride and sour gas environments. Zeron Fasteners manufactures and supplies these critical flanges in various types (Weld Neck, Slip-On, Blind, etc.), ensuring compliance with standards such as ASME B16.5 and the material specification ASTM A182 F55 for use in petrochemical, offshore, and desalination facilities.

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UNS S32760 Flanges

Chemical Composition (UNS S32760 / F55)

Element Composition (%)
Chromium (Cr) 24.0 to 26.0
Nickel (Ni) 6.0 to 8.0
Molybdenum (Mo) 3.0 to 4.0
Tungsten (W) 0.5 to 1.0
Copper (Cu) 0.5 to 1.0
Nitrogen (N) 0.20 to 0.30
Carbon (C) Max 0.030
Silicon (Si) Max 1.00
Manganese (Mn) Max 1.00
Phosphorus (P) Max 0.035
Sulfur (S) Max 0.010

Mechanical Properties (UNS S32760 / F55)

Property Minimum Value
Ultimate Tensile Strength 750 MPa Min
Yield Strength (0.2% Proof) 550 MPa Min
Elongation (A) 15 % Min
Hardness (HBW Max) 270
Impact Energy Charpy V-Notch 45 J at -50°C Min
Pitting Resistance Equivalent Number (PREN) 40 Min

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