Duplex and Super Duplex UNS S31803 Reducers

Duplex and Super Duplex UNS S31803 Reducers are pipe fittings used to connect piping sections of different diameters. They are typically categorized as Concentric Reducers (cone-shaped, used vertically) or Eccentric Reducers (side is flat, used horizontally). Manufactured from Duplex Stainless Steel (Alloy 2205 / UNS S31803), these reducers ensure the material integrity of the line remains intact, offering high mechanical strength and exceptional resistance to chloride-induced stress corrosion cracking. Zeron Fastners supplies these critical components for various process industries, including oil & gas, chemical processing, and desalination, where secure and corrosion-resistant transitions in pipeline dimensions are required.

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

Duplex and Super Duplex UNS S31803 Reducers 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 Reducers 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 Reducers Feature Products

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

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