Seamless Stainless Steel TP314 |UNS S31400|1.4841 Pipe
Distinguished by its high Silicon (Si) content, our TP314 (AISI 314) tubing develops a protective oxide layer that ensures exceptional stability at service temperatures up to 1150°C (2100°F). This makes them indispensable for mission-critical applications in radiant tubes, furnace components, and high-temperature petrochemical processing. Through advanced cold-drawing and precise solution annealing, Tengqi guarantees uniform microstructure and optimized creep strength, providing a reliable alternative to standard heat-resistant grades in aggressive thermal cycling conditions.
"Our optimized chemical balance, specifically the high Si levels, provides superior resistance to carburizing atmospheres compared to TP310S."
Seamless Stainless Steel TP314 Pipe (TP314 / UNS S31400 / W.Nr. 1.4841) is a high-silicon austenitic grade for severe high-temperature oxidation and carburizing environments. 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
TP314 (UNS S31400) — Composition %
| UNS | C | Mn | P | S | Si | Cr | Ni |
|---|---|---|---|---|---|---|---|
| S31400 | ≤ 0.25 | ≤ 2.00 | ≤ 0.045 | ≤ 0.030 | 1.50 – 3.00 | 23.0 – 26.0 | 19.0 – 22.0 |
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 | 7.8 g/cm3 |
| Thermal Conductivity | 15.0 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) | 25.0-28.0 |
Industry Applications
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Browse the complete ranges: All Stainless Steel Pipes | Explore Stainless Steel Tubes
CONTACT US
Lidun Industrial Park, Lidun Town, Zhouning County, Ningde City, Fujian Province，355400，China
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