Seamless Stainless Steel TP309 |UNS S30900|1.4828 Tube
Distinguished by its high Chromium (22-24%) and Nickel (12-15%) content, our TP310MoLN tubing offers superior creep strength and thermal stability at continuous service temperatures up to 1038°C (1900°F). These tubes are indispensable for mission-critical components in industrial furnaces, boiler baffles, and thermo-wells. Through advanced cold-drawing and precise solution annealing, Tengqi ensures a stable austenitic microstructure that maintains maximum durability under aggressive thermal cycling and mildly carburizing atmospheres.
"While TP310S offers higher heat resistance, TP309 provides a more cost-effective solution for environments up to 1900°F, especially in sulfur-bearing atmospheres where its corrosion resistance is superior."
Seamless Stainless Steel TP309 Tube (TP309 / UNS S30900 / W.Nr. 1.4828) is a high-chromium, high-nickel grade designed for elevated-temperature oxidation and thermal cycling. 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 A213 / ASME SA213 — Seamless
- ASTM A269 / A269M — Seamless & Welded
- ASTM A270 / A270M — Sanitary Tubing
- ASTM A1016 / A1016M — General Requirements
- EN 10216-5 — Seamless Pressure Tubing
- 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
TP309 (UNS S30900) — Composition %
| UNS | C | Mn | P | S | Si | Cr | Ni |
|---|---|---|---|---|---|---|---|
| S30900 | ≤ 0.20 | ≤ 2.00 | ≤ 0.045 | ≤ 0.030 | ≤ 1.00 | 22.0 – 24.0 | 12.0 – 15.0 |
Mechanical Properties
| Property | Value |
|---|---|
| Delivery Condition | Solution annealed, pickled & polished |
| Tensile Strength | ≥ 515 MPa |
| Yield Strength (0.2% offset) | ≥ 205 MPa |
| Elongation in 2 in. / 50 mm | ≥ 35% |
Physical Properties
| Property | Value |
|---|---|
| Density | 7.9 g/cm3 |
| Thermal Conductivity | 15.6 W/m·K |
| Specific Heat Capacity | 500 J/kg·K |
| Elastic Modulus | 200 GPa |
| Magnetic Properties | Non-magnetic (slightly magnetic when cold worked) |
| PREN (Pitting Resistance Equivalent) | 22.0-24.0 |
Industry Applications
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CONTACT US
Lidun Industrial Park, Lidun Town, Zhouning County, Ningde City, Fujian Province，355400，China
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