Duplex and Super Duplex UNS S32750 Weld Neck Flanges

The Duplex and Super Duplex UNS S32750 Weld Neck Flange is a superior forging component explicitly designed for the most demanding piping applications involving high pressure, sub-zero, or elevated temperatures, and severe corrosive media. The key feature of the Weld Neck flange is its long tapered hub, which provides crucial reinforcement and allows for a butt-weld connection to the pipe. This butt-weld minimizes stress concentration and reduces erosion at the joint, ensuring the highest level of joint integrity and strength in the system. Manufactured from Super Duplex UNS S32750 (F53), these flanges offer exceptional mechanical strength and unparalleled resistance to environmental degradation, including chloride stress corrosion cracking and pitting. Zeron Fasteners manufactures and supplies these specialized flanges in strict compliance with standards like ASME B16.5 and ASTM A182, making them the preferred choice for critical pipelines in the offshore, petrochemical, and power generation sectors.

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UNS S32750 Weld Neck 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

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