Duplex and Super Duplex UNS S32205 Socket Head Cap Screws

Duplex and Super Duplex UNS S32205 Socket Head Cap Screws are high-precision fasteners characterized by a cylindrical head and an internal hexagonal (Allen) drive, allowing them to be fully recessed. Manufactured from the enhanced Duplex Stainless Steel UNS S32205 (Alloy 2205), these screws are favored for applications requiring high clamping force and minimal protrusion. They combine the superior yield strength of duplex stainless steel with its excellent resistance to chloride stress corrosion cracking, making them indispensable for machine tool assemblies, actuators, and precision equipment used in corrosive environments like marine, chemical, and petrochemical processing.

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UNS S32205 Socket Head Cap Screws

Duplex and Super Duplex UNS S32205 Socket Head Cap Screws Chemical Composition

Element Content (%)
Carbon (C) 0.030 max
Manganese (Mn) 2.00 max
Silicon (Si) 1.00 max
Phosphorus (P) 0.030 max
Sulfur (S) 0.020 max
Chromium (Cr) 21.0 – 23.0
Nickel (Ni) 4.5 – 6.5
Molybdenum (Mo) 2.5 – 3.5
Nitrogen (N) 0.08 – 0.20

Duplex and Super Duplex UNS S32205 Socket Head Cap Screws Mechanical Properties

Property Value
Tensile Strength (min) 620 MPa (90 ksi)
Yield Strength (0.2% Offset min) 450 MPa (65 ksi)
Elongation in 4D (min) 25%
Hardness (Brinell max) 290 HB

Duplex and Super Duplex UNS S32205 Socket Head Cap Screws Feature Products