ASTM A269 TP 904L Seamless Tubes

ASTM A269 TP 904L Seamless Tubes

ASTM A269 TP 904L Seamless Tubes are high-alloy austenitic stainless steel tubes specifically designed for superior corrosion resistance in highly aggressive chemical environments. With high chromium, nickel, and molybdenum content, 904L provides outstanding resistance to strong acids, pitting, and crevice corrosion.

These tubes are widely used in instrumentation systems, heat exchangers, and chemical processing applications where conventional stainless steels may not provide adequate corrosion protection.

Specifications

Standard	ASTM A269
Grade	TP 904L
Manufacturing Process	Seamless (Cold Drawn)
Outside Diameter	6 mm to 50.8 mm
Wall Thickness	0.5 mm to 6 mm
Length	Up to 6 Meters / Custom Length
Surface Finish	Annealed & Pickled, Bright Annealed
End Type	Plain End

Key Benefits

• Excellent Resistance to Strong Acids: Performs exceptionally well in sulfuric and phosphoric acid environments.
• Superior Pitting & Crevice Corrosion Resistance: Ideal for chloride-rich conditions.
• High Nickel Content: Enhances stress corrosion cracking resistance.
• Low Carbon Content: Reduces risk of intergranular corrosion after welding.
• Outstanding Fabricability: Good formability and weldability.
• Long Service Life: Designed for demanding industrial applications.

Chemical Composition (Typical)

Element	904L (%)
Carbon	0.02 Max
Chromium	19.0 – 23.0
Nickel	23.0 – 28.0
Molybdenum	4.0 – 5.0
Copper	1.0 – 2.0

Applications

• Chemical Processing Equipment
• Heat Exchangers
• Oil & Gas Industry
• Marine Applications
• Pharmaceutical Industry
• Pollution Control Equipment

Quality Testing

• Hydrostatic or Air Underwater Testing
• Ultrasonic Testing (UT)
• Eddy Current Testing
• Hardness & Tensile Testing
• Dimensional Inspection

Conclusion

ASTM A269 TP 904L Seamless Tubes provide exceptional corrosion resistance, particularly in highly aggressive chemical environments. Their high alloy composition and reliable mechanical properties make them a premium choice for critical industrial applications requiring long-term durability and performance.