Zeron Fastners
Duplex and Super Duplex UNS S31803 Tees
Duplex and Super Duplex UNS S31803 Tees are T-shaped pipe fittings used to merge or split fluid flow in a main pipeline, typically at a 90-degree angle. They are classified as either Equal Tees (all three ports are the same size) or Reducing Tees (the branch port is smaller than the run ports). Manufactured from Duplex Stainless Steel (Alloy 2205 / UNS S31803), these tees possess high strength and outstanding resistance to chloride stress corrosion cracking, making them indispensable in complex piping networks found in chemical plants, petrochemical facilities, and offshore applications where reliable fluid distribution is vital under harsh corrosive conditions. Zeron Fastners supplies these in seamless and welded constructions.
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Duplex and Super Duplex UNS S31803 Tees 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 Tees 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 |