Seamless Stainless Steel TP310MoLN |UNS S31050|1.4466 Pipe
Enriched with 2% Molybdenum and 0.12% Nitrogen, our 310MoLN pipes offer superior structural stability and resistance to pitting and crevice corrosion compared to standard 310S or 316L grades. These pipes are indispensable for high-pressure urea synthesis, nitric acid production, and aggressive chemical processing. Through advanced cold-drawing and specialized solution annealing, Tengqi ensures every pipe achieves a high-purity surface finish and precise dimensional accuracy for critical industrial operations.
"Our TP310MoLN pipes exhibit excellent resistance in the Huey Test (ASTM A262 Practice C), ensuring long-term integrity in nitric acid services."
Seamless Stainless Steel TP310MoLN Pipe (TP310MoLN / UNS S31050 / W.Nr. 1.4466) is a 25/22 austenitic grade with molybdenum and nitrogen additions, designed for continuous high-temperature service in oxidizing atmospheres and for urea / nitric-acid service where enhanced pitting and intergranular corrosion resistance is required. 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
TP310MoLN (UNS S31050) — Composition %
| UNS | C | Mn | P | S | Si | Cr | Ni | Mo | N | Cu |
|---|---|---|---|---|---|---|---|---|---|---|
| S31050 | ≤ 0.020 | ≤ 2.00 | ≤ 0.020 | ≤ 0.010 | ≤ 0.40 | 24.0 – 26.0 | 20.5 – 23.5 | 1.60 – 2.60 | 0.09 – 0.15 | ≤ 0.50 |
Mechanical Properties
| Property | Value |
|---|---|
| Delivery Condition | Solution annealed, pickled & polished |
| Tensile Strength | ≥ 540 MPa |
| Yield Strength (0.2% offset) | ≥ 240 MPa |
| Elongation in 2 in. / 50 mm | ≥ 35% |
Physical Properties
| Property | Value |
|---|---|
| Density | 7.98 g/cm3 |
| Thermal Conductivity | 14.2 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) | 24.0-26.0 |
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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