Duplex and Super Duplex UNS S31803 Threaded Rods

Duplex and Super Duplex UNS S31803 Threaded Rods are long, continuously threaded bars made from Duplex Stainless Steel (Alloy 2205 / UNS S31803). These rods are critical for applications demanding high tensile strength and superior resistance to environmental degradation, especially chloride-induced stress corrosion cracking and pitting. Zeron Fasteners manufactures these rods in various lengths and diameters, which are commonly used as anchor bolts, tie bars, or fully threaded studs when assembled with corresponding Duplex Nuts. The material's ferritic-austenitic microstructure grants it a yield strength significantly higher than conventional austenitic stainless steels like 316. They are essential in chemical processing, oil & gas industry equipment, power generation, and structural components exposed to seawater or high-chloride media.

Related Products

Duplex S31803 Hex Bolts Duplex S32205 Stud Bolts Super Duplex S32750 Nuts Super Duplex S32760 Screws Duplex S31803 Washers Duplex S31803 Pipe Fittings
UNS S31803 Threaded Rods

Duplex and Super Duplex UNS S31803 Threaded Rods 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 S31803 Threaded Rods 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 S31803 Threaded Rods Feature Products

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

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