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ASTM A335 T5 Alloy Steel Seamless Tubes – Heat Resistant Boiler Tubes

ASTM A335 T5 seamless tubes are chromium molybdenum alloy steel tubes designed for high temperature applications in boilers, heat exchangers, and industrial piping systems. These tubes offer excellent heat resistance, strength, and durability under thermal stress.

Product Overview – ASTM A335 T2 Seamless Tubes

ASTM A335 T5 seamless tubes are alloy steel tubes engineered for elevated temperature service and demanding heat transfer applications.With higher chromium content than lower T grades, T5 offers improved oxidation resistance and strength at high temperatures.

These tubes are widely used in applications where consistent thermal performance and pressure resistanceare essential. The seamless manufacturing process ensures uniform structure, excellent dimensional accuracy, and enhanced durability.

To achieve optimal mechanical properties, these tubes undergo heat treatment processes such as normalizing and tempering.

ASTM A335 T5 tubes are commonly used in boilers, superheaters, heat exchangers, and refinery systems.

Standard & International Identification - ASTM A335 T5 Seamless Tubes

Standard ASTM A335 / ASME SA335
Grade T5
UNS K41545
Material Type : Chromium Molybdenum Alloy Steel

Technical Specifications – ASTM A335 T5 Tubes

Tube Type: Seamless Alloy Steel Tubes
Manufacturing Process: Hot Rolling → Cold Drawing → Heat Treatment → Inspection
Outer Diameter: 6 mm – 325 mm
Wall Thickness: 1 mm – 40 mm
Length Options: Single Random Length/Cut Length / U-Bend Tubes Available
Surface Finish: Black Finish / Pickled Surface /Bright Annealed
Testing & Inspection: Hydrostatic Test,Ultrasonic Testing,Eddy Current Testing,Hardness Testing
Certification : EN 10204 3.1 / 3.2 MTC

Third Party Inspection Available

All specifications are in accordance of ASTM A335 / ASME SA335 standards. Mechanical and chemical values are as per standard limits. Mill Test Certificates (MTC) available upon request.

Chemical Composition – ASTM A335 T5

(As per ASTM specification)
Element Max (%)
Carbon (C): 0.15%
Manganese (Mn): 0.30 – 0.60%
Silicon (Si): 0.50%
Chromium (Cr): 4.00 – 6.00%
Molybdenum (Mo): 0.44 – 0.65%
Phosphorus (P): Max 0.025%
Sulfur (S): Max 0.025%
Iron : Balance
Note: This composition provides excellent high-temperature strength and oxidation resistance.

Mechanical Properties – ASTM A335 T5 Tubes

Property Minimum Value
Tensile Strength 415 MPa
Yield Strength 205 MPa
Elongation 30%
These properties make T5 suitable for high temperature heat transfer systems.

Heat Resistance & High Temperature Performance

ASTM A335 T5 tubes are designed for elevated temperature environments.

Key performance benefits include:

🔸 Excellent resistance to oxidation
🔸 Reliable strength at high temperatures
🔸 Good creep resistance
🔸 Stable performance under thermal stress

Because of these properties, T5 tubes are widely used in boilers and high-temperature industrial systems.

Major Industrial Applications of ASTM A335 T5 seamless tubes

    ASTM A335 T5 seamless tubes are commonly used in:
  • 🔸Boilers and Superheaters
  • 🔸Heat Exchangers
  • 🔸Power Plants
  • 🔸Petrochemical Plants
  • 🔸Heat Recovery Systems
  • 🔸Mechanical Systems

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Key Advantages of ASTM A335 T5 Seamless Tubes

Excellent heat resistance Good oxidation resistance Reliable performance under pressure Suitable for high temperature applications Long service life

Looking for a reliable ASTM A335 T5 seamless tube supplier in India?

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Frequently Asked Questions

–ASTM A335 T5 Tubes

What is ASTM A335 T5 tube?
ASTM A335 T5 is an alloy steel seamless tube used for high temperature applications in boilers and industrial systems.
What is the UNS number for T5 alloy steel?
The UNS designation for T5 is K41545.
Where are ASTM A335 T5 tubes used?
They are used in boilers, heat exchangers, power plants, and refinery systems.
Is T5 suitable for high temperature applications?
Yes, T5 offers excellent oxidation resistance and strength at elevated temperatures.
Do you supply ASTM A335 T5 seamless tubes in India?
Yes. ASTM A335 T5 seamless tubes are supplied from Mumbai with full certification and inspection support.