Duplex and Super Duplex UNS S32205 Hex Bolts

Duplex and Super Duplex UNS S32205 Hex Bolts are externally threaded fasteners featuring a six-sided (hexagonal) head, widely recognized as the industry standard for high-strength bolting. Manufactured from Duplex Stainless Steel UNS S32205 (Alloy 2205), these bolts are characterized by a higher nitrogen content than the older S31803 specification, enhancing their strength and resistance to pitting corrosion. They offer superior yield strength—roughly double that of 316L stainless steel—combined with excellent resistance to chloride stress corrosion cracking. Zeron Fasteners supplies these critical bolts for structural applications, pressure vessels, chemical tankers, and offshore platforms where maximum corrosion protection and robust mechanical integrity are required.

Related Products

Duplex S31803 Stud Bolts Super Duplex S32760 Hex Bolts Duplex S32205 Nuts Duplex S32205 Washers Duplex S31803 Flanges Duplex S31803 Pipe Fittings
UNS S32205 Hex Bolts

Duplex and Super Duplex UNS S32205 Hex Bolts 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 Hex Bolts 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 Hex Bolts Feature Products

Super Duplex S32750 Flanges Monel 400 Socket Cap Screws SS 316 Pipe Fittings Alloy Steel Cap Screws

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