ASTM A249 TP304L Tube (Pipe) Supplier & Exporter in India

ASTM A249 TP304L Tube (Pipe) is a low-carbon welded austenitic stainless steel tube manufactured for boilers, superheaters, heat exchangers, and condensers. TP304L is the low-carbon version of TP304, specifically designed to reduce the risk of intergranular corrosion after welding.

With a maximum carbon content of 0.035%, TP304L minimizes chromium carbide precipitation during welding, improving corrosion resistance in welded structures. Manufactured under ASTM A249 specifications, these tubes are supplied in the welded and heat-treated condition to meet mechanical and metallurgical requirements. Although commonly referred to as “pipe” in trade terminology, ASTM A249 technically covers welded stainless steel tubes.

Difference Between TP304 and TP304L

  • TP304 Carbon Content: Maximum 0.08%
  • TP304L Carbon Content: Maximum 0.035%

The lower carbon content in TP304L significantly reduces sensitization during welding, making it more suitable for applications involving heavy fabrication and welded joints.

Key Features of ASTM A249 TP304L

  • Enhanced Weldability
    Low carbon content minimizes carbide formation at welded joints, improving corrosion resistance in fabricated assemblies.
  • Excellent Corrosion Resistance
    Provides strong resistance to atmospheric corrosion, oxidation, and mildly aggressive chemicals in both oxidizing and moderately reducing environments.
  • Reliable High Temperature Performance
    Maintains mechanical strength and oxidation resistance in elevated temperature service such as boilers and heat exchanger systems.
  • Good Fabrication Properties
    Offers excellent formability and is widely used where extensive welding is required.
  • Standard Compliance
    Manufactured in accordance with 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): 18.0 – 20.0%
  • Nickel (Ni): 8.0 – 12.0%
  • 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 TP304L Tube

  • Boilers & Heat Exchangers
    Suitable for high-temperature fluid handling in thermal processing systems.
  • Condenser Systems
    Ensures efficient heat exchange performance even in moderately corrosive environments.
  • Oil & Gas Industry
    Preferred where extensive welding is required in corrosive process conditions.
  • Petrochemical Plants
    Used in fabricated piping systems handling aggressive fluids and gases.
  • Power Generation
    Applied in steam generation and thermal energy systems requiring corrosion resistance.

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Faq's

A: The low carbon content of TP304L minimizes carbide precipitation, improving weldability and durability in boiler applications.

A: Power generation, chemical, and pharmaceutical industries across Mexico, Russia, Brazil, Argentina, and globally.

A: Yes, Yash Impex manufactures and exports ASTM A249 TP304L seamless pipes as per customer specifications.

A: Pipes undergo hydrostatic, hardness, and mechanical testing before export.
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