Zeron Fastners
Duplex and Super Duplex UNS S31803 Slip-On Flanges
Duplex and Super Duplex UNS S31803 Slip-On Flanges (SOF) are easily recognizable by their larger internal diameter, allowing them to slip over the pipe. The flange is then welded both inside and outside to ensure sufficient strength and prevent leaks. Manufactured from Duplex Stainless Steel (Alloy 2205 / UNS S31803), these flanges offer a cost-effective and easy-to-install alternative to weld neck flanges in applications where space is limited or where quick alignment is needed. They provide excellent resistance to localized corrosion and high strength, making them suitable for moderate pressure and temperature applications in the chemical, water treatment, and industrial cooling systems. Zeron Fastners guarantees dimensional accuracy and material integrity for optimal performance.
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Duplex and Super Duplex UNS S31803 Slip-On Flanges 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 Slip-On Flanges 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 |