Duplex and Super Duplex UNS S31803 Elbows

Duplex and Super Duplex UNS S31803 Elbows are pipe fittings used to change the direction of fluid flow in a piping system, typically at 45 or 90 degrees. These elbows are manufactured from Duplex Stainless Steel (Alloy 2205 / UNS S31803), providing exceptional mechanical strength and superior corrosion resistance, particularly against chloride-induced stress corrosion cracking and pitting corrosion. Zeron Fastners supplies these elbows in various forms (long radius, short radius, butt-weld, and forged) for demanding applications in chemical, oil & gas, marine, and pulp and paper industries where maintaining high flow integrity and preventing corrosion-related failures are paramount.

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Duplex S31803 Hex Bolts Duplex S32205 Stud Bolts Super Duplex S32750 Nuts Duplex S31803 Flanges Duplex S31803 Tees Duplex S31803 Reducers
UNS S31803 Elbows

Duplex and Super Duplex UNS S31803 Elbows 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 Elbows 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 Elbows Feature Products

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

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