Super Duplex Steel Socket Head Cap Screws

Zeron Fasteners offers high-quality Super Duplex Steel Socket Head Cap Screws designed for critical applications requiring exceptional strength, toughness, and superior resistance to aggressive environments. With a higher alloy content than standard duplex grades, super duplex steel provides outstanding resistance to chloride-induced stress corrosion cracking, pitting, and crevice corrosion. These screws are widely used in offshore, marine, desalination, petrochemical, and power generation industries.

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Super Duplex Steel Socket Head Cap Screws

Super Duplex Steel Socket Head Cap Screws Chemical Composition

ElementTypical Range (%)
Chromium (Cr)24 – 26
Nickel (Ni)6 – 8
Molybdenum (Mo)3 – 5
Nitrogen (N)0.24 – 0.35
Carbon (C)≤ 0.03
Manganese (Mn)≤ 2.00

Super Duplex Steel Socket Head Cap Screws Mechanical Properties

PropertyValue
Tensile Strength800 – 1000 MPa
Yield Strength550 – 750 MPa
Elongation≥ 25 %
Hardness≤ 310 HB

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