Duplex and Super Duplex UNS S32205 Couplings

The Duplex and Super Duplex UNS S32205 Coupling is a vital pipe fitting used to connect two pieces of pipe or tubing permanently, either through welding (Socket-Weld Coupling) or threading (Threaded Coupling). Manufactured by Zeron Fasteners, these couplings are specified for systems requiring outstanding resistance to chloride stress corrosion cracking and pitting, primarily due to their dual-phase microstructure. Their high mechanical strength, approximately twice that of standard stainless steel, allows for thinner, lighter pipeline construction without compromising integrity. The primary application of these couplings is in highly corrosive industrial sectors, including desalination plants, chemical tankers, and upstream oil & gas operations, where maintaining joint integrity against aggressive media is non-negotiable. Zeron Fasteners ensures all couplings adhere strictly to ASTM A815 or A182 standards for forged and wrought fittings, guaranteeing durability and reliability.

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UNS S32205 Couplings

Duplex and Super Duplex UNS S32205 Couplings

Manufacturing Specifications
Standard ASME B16.11, MSS SP-79, MSS SP-83, MSS SP-95
Grades Duplex UNS S32205 (2205), Super Duplex UNS S32750 (2507)
Size Range 1/8 inch to 4 inch
Pressure Class 2000 LBS, 3000 LBS, 6000 LBS, 9000 LBS
Type Full Coupling, Half Coupling, Reducing Coupling
End Connection Socket Weld (SW), Threaded (NPT, BSPT)
Duplex S32205 Socket Weld and Threaded Coupling Diagram

Chemical Composition (UNS S32205)

Element Weight
Carbon (C) Max 0.030
Chromium (Cr) 22.0 to 23.0
Nickel (Ni) 4.50 to 6.50
Molybdenum (Mo) 3.00 to 3.50
Nitrogen (N) 0.14 to 0.20
Manganese (Mn) Max 2.00
Silicon (Si) Max 1.00

Mechanical Properties (UNS S32205)

Property Value
Tensile Strength (Min) 655 MPa
Yield Strength (Min) 450 MPa
Elongation (Min) 25% Min
Hardness (Max) 290 HBW Max
Impact Energy 100 J Min

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