Seamless Stainless Steel TP321 |UNS S32100|1.4541 Pipe
Distinguished by the strategic addition of Titanium (Ti), our TP321 tubing prevents chromium carbide precipitation during prolonged exposure to temperatures in the 427°C - 816°C (800°F - 1500°F) range. This makes them indispensable for mission-critical applications in heat exchanger tubes, petrochemical refinery infrastructure, and power plant boilers. Through advanced cold-drawing and precise solution annealing, ensures every pipe maintains a uniform microstructure and optimized mechanical strength for demanding thermal cycling conditions.
"For applications requiring higher creep resistance at temperatures above 1000°F, we recommend TP321H (UNS S32109) with optimized carbon content."
Seamless Stainless Steel TP321 Pipe (TP321 / UNS S32100 / W.Nr. 1.4541) is a titanium-stabilized austenitic grade for elevated-temperature service between 425 °C and 815 °C. 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 A312 / ASME SA312 — Seamless & Welded
- ASTM A999 / A999M — General Requirements
- ASTM A213 / ASME SA213 — Seamless
- 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 mm – 1016 mm (1/4"– 40") | 0.5 mm – 65 mm | 6 m / 12 m, or as required |
Chemical Composition
TP321 (UNS S32100) — Composition %
| UNS | C | Mn | P | S | Si | Cr | Ni | Ti |
|---|---|---|---|---|---|---|---|---|
| S32100 | ≤ 0.08 | ≤ 2.00 | ≤ 0.045 | ≤ 0.030 | ≤ 1.00 | 17.0 – 19.0 | 9.0 – 12.0 | 5(C+N)-0.70 |
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 | 16.1 W/m·K |
| Specific Heat Capacity | 500 J/kg·K |
| Elastic Modulus | 193 GPa |
| Magnetic Properties | Non-magnetic (slightly magnetic when cold worked) |
| PREN (Pitting Resistance Equivalent) | 18.0-20.0 |
Industry Applications
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