Super Duplex UNS S32750 Stud Bolts

The Super Duplex UNS S32750 Stud Bolt is the ideal choice for creating secure, high-integrity joints in pipeline and pressure vessel flanges. A stud bolt is essentially a threaded rod, typically supplied with two nuts, and is designed to distribute the clamping force evenly across the flange faces. Manufactured by Zeron Fasteners, these stud bolts use the UNS S32750 (Super Duplex 2507) material, which possesses an exceptionally high Pitting Resistance Equivalent Number (PREN) above 40. This provides unparalleled resistance to chloride stress corrosion cracking and localized corrosion in aggressive media. Their primary application is in mission-critical, high-pressure, and high-temperature service, especially in chemical processing, offshore oil and gas, and shipbuilding, where bolting failure due to corrosion is unacceptable. Zeron Fasteners ensures these products meet the stringent requirements of ASTM A193 Grade B8S (a specialized Super Duplex equivalent).

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UNS S32750 Stud Bolts

Super Duplex UNS S32750 Stud Bolts

Manufacturing Specifications
Standard ASME B16.5, ASME B18.2.1, API 20E
Material Grade Super Duplex UNS S32750 (F53, SAF 2507)
Applicable Specs ASTM A193 / A193M (B8S), NACE MR0175, ISO 15156
Size Range 1/4 inch to 4 inches (M6 to M100)
Thread Type UNC, 8UN, Metric Coarse or Fine
Configuration Continuous Thread, Double End, Tap End (Supplied with A194 Gr 8S Nuts)

Chemical Composition (UNS S32750)

Element Composition (%)
Carbon (C) Max 0.030
Chromium (Cr) 24.0 to 26.0
Nickel (Ni) 6.00 to 8.00
Molybdenum (Mo) 3.00 to 5.00
Nitrogen (N) 0.24 to 0.32
Copper (Cu) Max 0.50
Tungsten (W) Max 1.00

Mechanical Properties (UNS S32750)

Property Value
Tensile Strength (Min) 750 MPa Min
Yield Strength (Min) 550 MPa Min
Elongation (Min) 15% Min
Hardness (Max) 320 HBW Max
Impact Energy 40 J Min

Features Product

SS 304L Blind Flanges Nickel Alloys Incoloy 825 Hex Bolts Duplex and Super Duplex UNS S32205 Tees ASTM A193 B8M Flanges

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