Product Overview – ASTM A213 TP316LN Seamless Tubes
ASTM A213 TP316LN is an advanced low carbon, nitrogen-alloyed stainless steel grade designed for applications requiring higher mechanical strength and improved resistance to localized corrosion.
The addition of nitrogen increases yield strength while enhancing resistance to chloride pitting — making TP316LN ideal for offshore platforms, marine processing, pressure vessels, and critical heat exchanger systems.
Manufactured using seamless hot finished or cold drawn processes, these tubes ensure consistent wall thickness, smooth internal surface finish, and superior pressure handling capacity.
Compared to TP316L, TP316LN provides higher strength and improved structural stability under demanding operating conditions.
Standard & International Identification - ASTM A213 TP316LN Seamless Tubes
Technical Specifications – TP316LN Seamless Tubes
| Tube Type: | Seamless / Cold Drawn / Hot Finished |
| Outer Diameter Range: | 6 mm to 273 mm |
| Wall Thickness: | 1 mm to 30 mm |
| Length: | Random / Cut Length / U-Bend Tubes |
| Surface Finish: | Bright Annealed / Pickled & Annealed |
| Testing: | Plain End (PE), Beveled End (BE) |
| Testing: | Hydrostatic Test, Eddy Current Test,Ultrasonic Testing, PMI |
| Certification : | EN 10204 3.1 / 3.2 MTC |
Suitable for High Pressure, Marine & Offshore Applications
All specifications are in accordance of ASTM A213 / ASME SA213 standards. Mechanical and chemical values are as per standard limits. Mill Test Certificates (MTC) available upon request.
Chemical Composition of ASTM A213 TP316L Seamless Tubes
(As per ASTM specification)
| Element | Max (%) |
|---|---|
| Carbon (C): | 0.03% |
| Manganese (Mn): | 2.00 % |
| Silicon (Si): | 1.00% |
| Phosphorus (P): | 0.045 % |
| Sulfur (S): | 0.030 % |
| Chromium (Cr): | 16.0-18.0% |
| Nickel (Ni): | 10.0-14.0% |
| Molybdenum (Mo): | 2.0 – 3.0% |
| Nitrogen (N): | 0.10 – 0.16% |
| Iron : | Balance |
Note: Nitrogen enhances mechanical strength and pitting resistance.
Mechanical Properties – TP316LN Seamless Tubes
| Property | Minimum Value |
|---|---|
| Tensile Strength | 515 MPa |
| Yield Strength | 240 MPa |
| Elongation | 35% |
Higher yield strength compared to 316L makes it suitable for structural and pressure-intensive systems.
Performance Advantages in Critical Environments- ASTM A213 TP316LN Seamless Tubes
SS 316LN seamless tubes provide:
For offshore oil & gas and nuclear-grade applications, TP316LN is frequently specified due to its enhanced strength profile.
Major Industrial Applications of TP316LN Seamless Tubes
- 🔸Offshore oil and gas platforms
- 🔸Marine pipelines and systems
- 🔸High pressure heat exchangers
- 🔸Nuclear and power generation plants
- 🔸Chemical and petrochemical processing units
- 🔸Cryogenic processing systems
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