Duplex and Super Duplex UNS S32750 Blind Flanges

The Duplex and Super Duplex UNS S32750 Blind Flange is a solid, circular metal forging designed without a bore, used to terminate the end of a piping system, valve opening, or pressure vessel nozzle. As a crucial component for isolation, future expansion, or inspection access, it must withstand the entire pressure and temperature rating of the pipeline, which makes material strength paramount. Manufactured from Super Duplex UNS S32750 (F53), these flanges possess a dual-phase microstructure that provides superior strength and outstanding corrosion resistance, particularly against chloride stress corrosion cracking and pitting in harsh environments. Zeron Fasteners manufactures and supplies these essential isolation flanges to comply strictly with specifications like ASME B16.5 and ASTM A182, ensuring a complete, leak-proof seal for critical applications in offshore oil and gas, chemical processing, and desalination plants.

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UNS S32750 Blind Flanges

Chemical Composition (UNS S32750)

Element Composition (%)
Chromium (Cr) 24.0 to 26.0
Nickel (Ni) 6.0 to 8.0
Molybdenum (Mo) 3.0 to 5.0
Nitrogen (N) 0.24 to 0.32
Carbon (C) Max 0.030
Silicon (Si) Max 0.80
Manganese (Mn) Max 1.20
Phosphorus (P) Max 0.035
Sulfur (S) Max 0.020

Mechanical Properties (UNS S32750)

Property Minimum Value
Ultimate Tensile Strength 800 MPa Min
Yield Strength (0.2% Proof) 550 MPa Min
Elongation (A) 15 % Min
Hardness (HBW Max) 310
Impact Test Charpy V 54 J at -46 °C Min

Features Product

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