Seamless Stainless Steel TP316L |UNS S31603|1.4404 Pipe
Distinguished by its extra-low carbon content (0.03% max) and strategic Molybdenum (2.0–3.0%) addition, our TP316L tubing effectively prevents carbide precipitation during welding, eliminating the risk of intergranular corrosion in the heat-affected zone (HAZ). These pipes are indispensable for mission-critical applications in pharmaceutical processing, marine infrastructure, and high-pressure petrochemical systems. Through advanced cold-drawing and precise solution annealing,we ensures every pipe maintains a stable austenitic microstructure and superior surface finish for demanding global industrial needs.
TP316L PREN ≈ 24-26,higher than TP304L PREN ≈ 18
Seamless Stainless Steel TP316L Pipe (TP316L / UNS S31603 / W.Nr. 1.4404) is a molybdenum-bearing austenitic grade with extra-low carbon content for chloride-rich, welded service. 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
TP316L (UNS S31603) — Composition %
| UNS | C | Mn | P | S | Si | Cr | Ni | Mo |
|---|---|---|---|---|---|---|---|---|
| S31603 | ≤ 0.035 | ≤ 2.00 | ≤ 0.045 | ≤ 0.030 | ≤ 1.00 | 16.0 – 18.0 | 10.0 – 14.0 | 2.00 – 3.00 |
Mechanical Properties
| Property | Value |
|---|---|
| Delivery Condition | Solution annealed, pickled & polished |
| Tensile Strength | ≥ 485 MPa |
| Yield Strength (0.2% offset) | ≥ 170 MPa |
| Elongation in 2 in. / 50 mm | ≥ 35% |
Physical Properties
| Property | Value |
|---|---|
| Density | 8.0 g/cm3 |
| Thermal Conductivity | 16.3 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) | 24.0-26.0 |
Industry Applications
Related Products
Related Seamless Pipes & Tubes
Explore more grades and sizes from XTD Special Steel — related seamless pipe and tube products:
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- Seamless Stainless Steel TP316 Pipe
- Seamless Stainless Steel TP317 Pipe
- Seamless Stainless Steel TP317L Pipe
- Seamless Stainless Steel TP316Ti Pipe
- Seamless Stainless Steel TP347 Pipe
Browse the complete ranges: All Stainless Steel Pipes | Explore Stainless Steel Tubes
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