Seamless Duplex Steel S31500 |UNS S31500|1.4417 Tube
Our S31500 duplex tubes are specifically designed to provide a strategic combination of high mechanical strength and exceptional resistance to chloride-induced stress corrosion cracking (SCC). With a yield strength nearly double that of conventional 300-series stainless steels, these tubes allow for thinner wall designs and increased pressure ratings in heat exchangers and chemical processing systems. Through advanced cold-drawing and precise solution annealing at our modern facilities, Tengqi ensures every tube maintains optimal phase balance and a high-integrity surface finish for the most demanding industrial environments.
"Our S31500 tubes offer a PREN value that ensures long-term durability in brackish water and mildly corrosive chemical media."
Seamless Duplex Steel S31500 Tube (S31500 / UNS S31500 / W.Nr. 1.4417) is a lean duplex grade balancing high strength with good chloride stress corrosion resistance. Manufactured by Tengqi in Fujian, China, every heat is fully traceable, hydro-tested and available with third-party inspection (SGS / BV / TUV) on request.
Product Specifications
- ASTM A789 / ASME SA789 — Seamless & Welded
- ASTM A790 / ASME SA790 — Seamless Pipe
- ASTM A1016 / A1016M — General Requirements
- Finishing: solution annealed, pickled & polished; bright annealed available on request
Size Range
| Outside Diameter (OD) | Wall Thickness | Length |
|---|---|---|
| 6.35 mm – 257 mm (1/4"– 10.1") | 0.5 mm – 12.7 mm | ≤ 22 m |
Chemical Composition
S31500 (UNS S31500) — Composition %
| UNS | C | Mn | P | S | Si | Cr | Ni | Mo | N |
|---|---|---|---|---|---|---|---|---|---|
| S31500 | ≤ 0.030 | 1.20 – 2.00 | ≤ 0.030 | ≤ 0.030 | 1.40 – 2.00 | 18.0 – 19.0 | 4.2 – 5.2 | 2.50 – 3.00 | 0.05 – 0.10 |
Mechanical Properties
| Property | Value |
|---|---|
| Delivery Condition | Solution annealed, pickled & polished |
| Tensile Strength | ≥ 630 MPa |
| Yield Strength (0.2% offset) | ≥ 440 MPa |
| Elongation in 2 in. / 50 mm | ≥ 30% |
Physical Properties
| Property | Value |
|---|---|
| Density | 7.8 g/cm3 |
| Thermal Conductivity | 15.0 W/m·K |
| Specific Heat Capacity | 480 J/kg·K |
| Elastic Modulus | 200 GPa |
| Magnetic Properties | Magnetic |
| PREN (Pitting Resistance Equivalent) | 28.0-30.0 |
Industry Applications
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CONTACT US
Lidun Industrial Park, Lidun Town, Zhouning County, Ningde City, Fujian Province，355400，China
+86-577-88877003
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