ASTM A249 TP316L Tube (Pipe) Supplier & Exporter in India

ASTM A249 TP316L Tube (Pipe) is a low-carbon, molybdenum-bearing austenitic stainless steel welded tube manufactured for boilers, superheaters, heat exchangers, and condensers. TP316L is the low-carbon version of TP316, containing a maximum of 0.035% carbon to minimize the risk of sensitization during welding.

The addition of 2.0–3.0% molybdenum enhances resistance to pitting and crevice corrosion, particularly in chloride-containing environments. Due to its reduced carbon content, TP316L offers improved resistance to intergranular corrosion after welding, making it highly suitable for heavily fabricated and welded structures. Although commonly referred to as “pipe” in trade terminology, ASTM A249 technically covers welded stainless steel tubes.

Difference Between TP316 and TP316L

  • TP316 Carbon Content: Maximum 0.08%
  • TP316L Carbon Content: Maximum 0.035%

The lower carbon content in TP316L significantly reduces carbide precipitation during welding, preventing intergranular corrosion in the heat-affected zone and improving long-term durability in corrosive environments.

Key Features of ASTM A249 TP316L

  • Improved Weldability
    Low carbon content prevents chromium carbide formation during welding, protecting against intergranular corrosion.
  • Superior Corrosion Resistance
    Molybdenum addition enhances resistance to pitting and crevice corrosion in chloride-rich environments.
  • Excellent High Temperature Performance
    Maintains strength and oxidation resistance under elevated temperature service conditions.
  • Good Fabrication Characteristics
    Suitable for forming, bending, and welding in complex industrial assemblies.
  • ASTM A249 Compliance
    Manufactured according to ASTM A249 requirements for welded austenitic stainless steel boiler and heat exchanger tubes.

Chemical Composition

  • Carbon (C): ≤ 0.035%
  • Manganese (Mn): ≤ 2.00%
  • Phosphorus (P): ≤ 0.045%
  • Sulfur (S): ≤ 0.030%
  • Silicon (Si): ≤ 1.00%
  • Chromium (Cr): 16.0 – 18.0%
  • Nickel (Ni): 10.0 – 14.0%
  • Molybdenum (Mo): 2.0 – 3.0%
  • Iron (Fe): Balance

Mechanical Properties (Annealed Condition – Minimum)

  • Tensile Strength: ≥ 485 MPa
  • Yield Strength (0.2% Proof): ≥ 170 MPa
  • Elongation: ≥ 35%

Applications of ASTM A249 TP316L Tube

  • Heat Exchangers & Condensers
    Reliable handling of corrosive fluids in chemical and marine environments.
  • Boilers & Superheaters
    Suitable for high temperature and pressure steam generation systems.
  • Process Piping Systems
    Ideal for transportation of corrosive media where welding integrity is critical.
  • Marine & Offshore Equipment
    Excellent resistance to saline and chloride-rich conditions.
  • Chemical & Pharmaceutical Plants
    Used in hygienic and corrosion-sensitive processing applications.

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Faq's

A: Their low carbon content makes them resistant to sensitization, ideal for welded applications in harsh environments.

A: Yes, Yash Impex supplies ASTM A249 TP316L pipes to Mexico, Russia, India, Brazil, and worldwide.

A: Yash Impex acts as a manufacturer, supplier, and exporter, serving clients globally.

A: Yes, they are manufactured as seamless pipes for superior strength and durability.
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